阅读说明：本技术 油雾抑制剂、含有油雾抑制剂的润滑剂及油雾减少方法 (Mist suppressant, lubricant containing mist suppressant and mist reduction method ) 是由 稻垣裕之 秋永恵一 川村直司 于 2018-01-19 设计创作，主要内容包括：[问题]提供油雾抑制剂、含有该油雾抑制剂的润滑剂以及使用该油雾抑制剂的油雾减少方法,所述油雾抑制剂有效抑制在用润滑剂处理的过程中由润滑剂产生的油雾而不削弱用润滑剂处理的目的或处理的效果。[解决方案]油雾抑制剂包含有机硅流体组合物,所述有机硅流体组合物可与在25℃下运动粘度为10.0mm<Sup>2</Sup>/s的二甲基聚硅氧烷油均匀共混。通过向二甲基聚硅氧烷油中添加1.0质量％的有机硅流体组合物,该油雾抑制剂具有将二甲基聚硅氧烷油的最大层状长度增加至少5％的性质。([ problem ] to]An oil mist suppressing agent which effectively suppresses oil mist generated from a lubricant during treatment with the lubricant without impairing the purpose of treatment with the lubricant or the effect of treatment, a lubricant containing the oil mist suppressing agent, and an oil mist reducing method using the oil mist suppressing agent are provided. [ solution ]]The mist suppressant comprises a silicone fluid composition having a kinematic viscosity at 25 ℃ of 10.0mm 2 The dimethyl polysiloxane oil/s is blended uniformly. The mist suppressant has a maximum layer of dimethylpolysiloxane oil by adding 1.0 mass% of a silicone fluid composition to the dimethylpolysiloxane oilA property of at least 5% increase in the form length.)

1. An oil mist suppressant consisting of a silicone fluid composition having the following properties i) and ii):

i) The kinematic viscosity at 25 ℃ is 10.0mm²A property that increases the maximum lamellar length of the dimethylpolysiloxane oil by at least 5% upon addition of 1.0 mass% of the silicone fluid composition to the dimethylpolysiloxane oil; and

ii) and a kinematic viscosity at 25 ℃ of 10.0mm²The oil of dimethylpolysiloxane (D) is homogeneously miscible.

2. The oil mist suppressant according to claim 1 wherein the maximum lamellar length in property i) of the silicone fluid composition is increased by 10-100%.

3. The mist suppressant according to claim 1 or 2, for use in a fiber treatment oil, a spinning oil or a textile treatment oil.

4. The oil mist suppressant of any one of claims 1-3, wherein the silicone fluid composition contains:

(A)1 to 100 parts by mass of an organosilicon compound selected from the group consisting of the following component (a1), component (a2), and component (A3), and a mixture of two or more thereof:

(A1) a branched organopolysiloxane comprising in its molecule one or more branched siloxane units selected from the group consisting of R¹SiO_1.5T units of (wherein R¹Is a monovalent hydrocarbon group optionally substituted with a halogen atom) and is composed of SiO_2.0Q unit represented by the formula and a compound represented by the formula (R)² ₂SiO_1.0)_nA chain polysiloxane structure represented by (wherein R is²is a monovalent hydrocarbon group optionally substituted with a halogen atom, an alkoxy group or a silanol group, and n is a number in the range of 2 to 1,000);

(A2) A crosslinkable organopolysiloxane obtained by reacting

(a1) A cyclic or linear organohydrogendiene polysiloxane, and

(a2) Polydimethylsiloxane comprising alkenyl groups at least at both ends of the molecular chain

In the presence of a hydrosilylation catalyst such that the number of moles of alkenyl groups in component (a1) per 1 mole of hydrogen atoms bonded to silicon atoms in component (a2) is in the range of 0.9 to 1.2; and

(A3) A silicone rubber having a kinematic viscosity of 1,000,000-20,000,000mm at 25 ℃²/s or is plastic; and

(B)99-0 parts by mass of a compound having a kinematic viscosity of 1-1,000mm at 25 DEG C²A nonpolar silicone oil (other than those equivalent to the above-mentioned component (A1) or component (A2)); and

If the silicone fluid composition is a mixture of the organosilicon compound (A) and the non-polar silicone oil (B), the two are homogeneously mixed.

5. The oil mist suppressant according to claim 4, wherein the nonpolar silicone oil (B) has a kinematic viscosity at 25 ℃ of 1 to 100mm²Linear or cyclic nonpolar silicone oils.

6. The oil mist suppressant according to claim 4 or 5, wherein the non-polar silicone oil (B) is selected from the group consisting of having a kinematic viscosity at 25 ℃ of 1-10mm²One or more of the linear polydimethylsiloxanes, octamethylcyclotetrasiloxane, and decamethylcyclopentasiloxane of/s.

7. use of a silicone fluid composition as an oil mist suppressant, the silicone fluid composition comprising:

(A)1 to 100 parts by mass of an organosilicon compound selected from the group consisting of the following component (a1), component (a2), and component (A3), and a mixture of two or more thereof:

(A1) A branched organopolysiloxane comprising in its molecule one or more branched siloxane units selected from the group consisting of R¹SiO_1.5T units of (whereinR¹Is a monovalent hydrocarbon group optionally substituted with a halogen atom) and is composed of SiO_2.0Q unit represented by the formula and a compound represented by the formula (R)² ₂SiO_1.0)_nA chain polysiloxane structure represented by (wherein R is²Is a monovalent hydrocarbon group optionally substituted with a halogen atom, an alkoxy group or a silanol group, and n is a number in the range of 2 to 1,000);

(A2) a crosslinkable organopolysiloxane obtained by reacting

(a1) A cyclic or linear organohydrogendiene polysiloxane, and

(a2) Polydimethylsiloxane comprising alkenyl groups at least at both ends of the molecular chain

In the presence of a hydrosilylation catalyst such that the number of moles of alkenyl groups in component (a1) per 1 mole of hydrogen atoms bonded to silicon atoms in component (a2) is in the range of 0.9 to 1.2; and

(A3) A silicone rubber having a kinematic viscosity of 1,000,000-20,000,000mm at 25 ℃²/s or is plastic; and

(B)99-0 parts by mass of a compound having a kinematic viscosity of 1-1,000mm at 25 DEG C²A nonpolar silicone oil (other than those equivalent to the above-mentioned component (A1) or component (A2)); and

Is further characterized in that if the silicone fluid composition is a mixture of the organosilicon compound (A) and the nonpolar silicone oil (B), both are homogeneously mixed, and

The composition has the following properties i) and ii):

i) The kinematic viscosity at 25 ℃ is 10.0mm²A property that increases the maximum lamellar length of the dimethylpolysiloxane oil by at least 5% upon addition of 1.0 mass% of the silicone fluid composition to the dimethylpolysiloxane oil; and

ii) and a kinematic viscosity at 25 ℃ of 10.0mm²The oil of dimethylpolysiloxane (D) is homogeneously miscible.

8. Oil containing an oil mist suppressant according to any of claims 1-6.

9. The oil of claim 8, wherein the oil is a fiber treatment oil, a spinning oil, or a textile treatment oil.

10. A method of reducing oil mist, the method comprising:

Adding an oil mist suppressant according to any of claims 1-6 to an oil; and

applying the oil to another substrate.

11. the method of reducing oil mist of claim 10 wherein the other substrate is a fiber, yarn or textile.

Technical Field

the present invention relates to mist suppressant for use in oils, and more particularly to mist suppressant suitable for fiber treatment oils, spinning oils and textile treatment oils, to oils containing mist suppressant and to a method of reducing mist using mist suppressant.

background

Atomization, a phenomenon in which an applied coating agent is dispersed in the form of mist or aerosol, is a known problem that occurs due to the rotational movement of a rotating member or the translational movement of a substrate when applying a release coating agent or the like to the substrate using the rotating member such as a roller. Mist and aerosol particles not only negatively impact manufacturing by contaminating the work environment, but may also pose an industrial health and safety hazard to workers working near the coater.

Similarly, cutting and grinding fluids used with drill bits and the like are subjected to shear forces from the workpiece or tool during use and are physically atomized to produce fluid particles (oil mist) suspended in air. While large particle size oil mist will condense (re-liquefy) in a relatively short time, the fine mist will be released into the atmosphere before condensation can occur. As a result, the interior of the plant is contaminated with dispersed oil, which is not only problematic for the working environment, but may also present industrial health and safety hazards to the accompanying workers.

in order to solve this problem, patent documents 1 to 4 propose silicone-based antifogging agents for use in coating agents applied via a rotating member such as a roller; these antifogging agents can exhibit a certain degree of effectiveness in preventing the generation of mist due to a coating agent that will likely be cured or due to a rotating member such as a roller. However, in the case of oil treatment of fibers or stretchable substrates, such as fiber treatment, yarn treatment and textile treatment, the oil mist is generated by a force different from a rotational motion or a translational motion as in the case of coating; therefore, in such a case, these antifogging agents cannot effectively suppress the generation of oil mist. In addition, oils generally have a lower kinematic viscosity than coating agents and are not curable; therefore, when added to oils used in oil treatment, especially fiber treatment and textile treatment where penetration and impregnation of the substrate is required, these antifogging agents will not be homogeneously mixed therewith and thus cannot effectively inhibit the formation of oil mist, resulting in a potential problem of inhibiting the treatment of fibers or textiles.

Meanwhile, patent documents 5 and 6 propose adding silicone particles to a cutting fluid or the like to reduce oil mist. However, with this method, silicone particles are inevitably present in the oil, and solid particles adhere to the base material, thereby inhibiting the desired treatment effect of the oil or causing uneven treatment or defective products due to the occurrence of pooling; thus, there are many industrial environments where the anti-mist agents cannot be used in oil. Furthermore, as in the case discussed above, these oil mist preventatives, when added, cannot be mixed homogeneously with oil used for fiber treatment, yarn treatment or textile treatment, and therefore cannot effectively suppress the formation of oil mist.

For this reason, there is a need for an oil mist suppressant which can be used without disadvantages in non-curable, low kinematic viscosity oils, in particular for fiber treatment, yarn treatment and textile treatment, and which is able to effectively suppress the formation of oil mist during such treatment.

Meanwhile, although patent document 7 discloses a personal care composition containing a viscous silicone fluid, the problems to be solved and the effects of the silicone fluid are fundamentally different from oil treatment and oil mist suppression, and the document neither discloses nor suggests such problems.

[ Prior art documents ]

[ patent document ]

[ patent document 1] JP 2004-501262A

[ patent document 2] JP 2004-

[ patent document 3] JP 2010 502778A

[ patent document 4] JP 2006-336023A

[ patent document 5] JP 2014-055265A

[ patent document 6] JP 2016-

[ patent document 7] JP2013-

Disclosure of Invention

[ problem ] to

An object of the present invention is to provide an oil mist inhibitor which, when added to oil used in oil treatment in which penetration and impregnation of a substrate are required, particularly fiber treatment, yarn treatment or textile treatment, will effectively inhibit formation of oil mist from the oil during the treatment with the oil without inhibiting the purpose and effect of the oil treatment; and an oil containing the mist suppressant and a method of reducing mist using the mist suppressant.

[ solution of problem ]

As a result of special studies to solve the above problems, the present inventors have focused on the fact that the forces of oil mist formation caused by oils used in fiber treatment, yarn treatment and textile treatment are fundamentally different in action as described above. Specifically, a mist is formed by dispersing the coating agent or atomized oil caused by rotational and translational movements in the case of a roller or the like, by rotational and cutting shear stresses in the case of a drill bit or the like, and by tensile stresses (i.e., forces that pull the oil perpendicularly away from the tensile direction) in the case of treatments involving fibrous, flexible fibers, yarns, or textiles, acting on the oil, with the result that the oil is atomized by the tensile stresses and dispersed as an oil mist on the surface of the fibrous substrate before there is an opportunity to penetrate the substrate. Based on these technical observations, the present inventors have arrived at a novel idea of using a silicone fluid composition capable of imparting viscoelasticity to an oil and being uniformly miscible with the oil as an oil mist suppressant.

based on the above newly found problems and solutions, the present inventors found that the above problems can be solved by using, as an oil mist suppressor, a silicone fluid composition having a property of imparting viscoelasticity to oil by mixing with oil and effectively increasing the lamellar length of the oil, and thereby reached the present invention. In particular, the present inventors have found that the above problems can be effectively solved by using a silicone fluid composition as an oil mist suppressant, which has the following properties:

i) the kinematic viscosity at 25 ℃ is 10.0mm²Property of increasing the maximum lamellar length of the dimethylpolysiloxane oil by at least 5% when 1.0 mass% of the silicone fluid composition is added to the dimethylpolysiloxane oil; and

ii) and a kinematic viscosity at 25 ℃ of 10.0mm²The oil-miscible nature of the dimethylpolysiloxane of (a),

Thus, the present invention was obtained. For property i), although a kinematic viscosity of 10.0mm at 25 ℃ is mentioned²The dimethylpolysiloxane oil/s is used to specify the properties of the silicone fluid composition, but it goes without saying that the mist suppressant according to the invention also works effectively with other oils.

Specifically, the present invention includes the following aspects:

"[ 1] an oil mist suppressant consisting of a silicone fluid composition having the following properties i) and ii):

i) The kinematic viscosity at 25 ℃ is 10.0mm²property to increase the maximum lamellar length of the dimethylpolysiloxane oil by at least 5% when 1.0 mass% of the silicone fluid composition is added to the dimethylpolysiloxane oil; and

ii) and a kinematic viscosity at 25 ℃ of 10.0mm²The oil of dimethylpolysiloxane (D) is homogeneously miscible.

[2] The mist suppressant according to [1], wherein the maximum lamellar length is increased by 10 to 100% in property i) of the silicone fluid composition.

[3] The oil mist inhibitor according to [1] or [2], which is used in a fiber treatment oil, a spinning oil or a textile treatment oil.

[4] The oil mist suppressant according to any one of [1] to [3], wherein the silicone fluid composition contains:

(A)1 to 100 parts by mass of an organosilicon compound selected from the group consisting of the following component (a1), component (a2), and component (A3), and a mixture of two or more thereof:

(A1) a branched organopolysiloxane containing one or more branched siloxane units in its moleculeA unit wherein the branched siloxane unit is selected from the group consisting of R¹SiO_1.5T units of (wherein R¹Is a monovalent hydrocarbon group optionally substituted with a halogen atom) and is composed of SiO_2.0Q unit represented by the formula and a compound represented by the formula (R)² ₂SiO_1.0)_nA chain polysiloxane structure represented by (wherein R is²Is a monovalent hydrocarbon group optionally substituted with a halogen atom, an alkoxy group or a silanol group, and n is a number in the range of 2 to 1,000);

(A2) A crosslinkable organopolysiloxane obtained by reacting

(a1) Cyclic or linear organohydrogendiene polysiloxanes and

(a2) Polydimethylsiloxane comprising alkenyl groups at least at both ends of the molecular chain

In the presence of a hydrosilylation catalyst such that the number of moles of alkenyl groups in component (a1) per 1 mole of hydrogen atoms bonded to silicon atoms in component (a2) is in the range of 0.9 to 1.2; and

(A3) A silicone rubber having a kinematic viscosity of 1,000,000-20,000,000mm at 25 ℃²/s or is plastic; and

(B)99-0 parts by mass of a compound having a kinematic viscosity of 1-1,000mm at 25 DEG C²A nonpolar silicone oil (other than those equivalent to the above-mentioned component (A1) or component (A2)); and

If the silicone fluid composition is a mixture of the organosilicon compound (A) and the nonpolar silicone oil (B), the two are homogeneously mixed.

[5]According to [4]]the oil mist inhibitor of (A), wherein the nonpolar silicone oil (B) has a kinematic viscosity at 25 ℃ of 1 to 100mm²Linear or cyclic nonpolar silicone oils.

[6]According to [4]]or [ 5]]The oil mist inhibitor of (1), wherein the nonpolar silicone oil (B) is selected from the group consisting of those having a kinematic viscosity at 25 ℃ of 1 to 10mm²One or more of the linear polydimethylsiloxanes, octamethylcyclotetrasiloxane, and decamethylcyclopentasiloxane of/s.

[7] use of a silicone fluid composition as an oil mist suppressant, the silicone fluid composition comprising:

(A)1 to 100 parts by mass of an organosilicon compound selected from the group consisting of the following component (a1), component (a2), and component (A3), and a mixture of two or more thereof:

(A1) a branched organopolysiloxane comprising one or more branched siloxane units in its molecule, wherein the branched siloxane units are selected from the group consisting of R¹SiO_1.5T units of (wherein R¹Is a monovalent hydrocarbon group optionally substituted with a halogen atom) and is composed of SiO_2.0Q unit represented by the formula and a compound represented by the formula (R)² ₂SiO_1.0)_nA chain polysiloxane structure represented by (wherein R is²is a monovalent hydrocarbon group optionally substituted with a halogen atom, an alkoxy group or a silanol group, and n is a number in the range of 2 to 1,000);

(A2) crosslinkable organopolysiloxanes by reacting

(a1) cyclic or linear organohydrogendiene polysiloxanes and

(a2) Polydimethylsiloxane comprising alkenyl groups at least at both ends of the molecular chain

in the presence of a hydrosilylation catalyst such that the number of moles of alkenyl groups in component (a1) per 1 mole of hydrogen atoms bonded to silicon atoms in component (a2) is in the range of 0.9 to 1.2; and

(A3) A silicone rubber having a kinematic viscosity of 1,000,000-20,000,000mm at 25 DEG C²/s or is plastic; and

(B)99-0 parts by mass of a compound having a kinematic viscosity of 1-1,000mm at 25 DEG C²A nonpolar silicone oil (other than those equivalent to the above-mentioned component (A1) or component (A2)); and

Is also characterized in that if the silicone fluid composition is a mixture of the organosilicon compound (A) and the nonpolar silicone oil (B), the two are homogeneously mixed, and

The composition has the following properties i) and ii):

i) The kinematic viscosity at 25 ℃ is 10.0mm²when 1.0 mass% of silicone fluid composition is added to dimethylpolysiloxane oil/sa property of at least 5% increase in the maximum lamellar length of the silicone oil; and

ii) and a kinematic viscosity at 25 ℃ of 10.0mm²The oil of dimethylpolysiloxane (D) is homogeneously miscible.

[8] an oil containing the oil mist inhibitor according to any one of [1] to [6 ].

[9] The oil according to [8], wherein the oil is a fiber treatment oil, a spinning oil or a textile treatment oil.

[10] a method of reducing oil mist, the method comprising:

Adding an oil mist suppressing agent according to any one of [1] to [6] to an oil; and

applying the oil to another substrate.

[11] the method for reducing oil mist according to [10], wherein the other substrate is a fiber, a yarn or a textile. "

[ advantageous effects of the invention ]

By using the mist suppressant according to the present invention in oil used in oil treatment in which penetration and impregnation of a substrate are required, particularly fiber treatment, yarn treatment and textile treatment, formation of mist from oil during treatment with oil can be effectively suppressed without adversely affecting the purpose and effect of oil treatment. Also provided are oils containing the mist suppressant according to the invention and methods of reducing mist using the same.

Detailed Description

The silicone fluid composition constituting the mist suppressant according to the present invention will now be described. The silicone fluid composition has properties of imparting viscoelasticity to the oil by mixing with the oil and effectively increasing the maximum lamellar length of the oil; this gives rise to the advantage that, when added to an oil used in fiber treatment, yarn treatment or textile treatment, the composition effectively suppresses the formation of oil mist due to the action of tensile stress or the like on the oil without substantially suppressing the purpose of oil treatment and the effect of treatment. The organosilicon compound may be used alone in the silicone fluid composition as long as the desired properties described above are met; however, for miscibility with oil and ease of handling of the mist suppressant, use is made of a specific organosilicideAlso advantageous are silicone fluid compositions consisting of a homogeneous mixture of compounds which impart viscoelasticity to the oil with a non-polar silicone oil having a kinematic viscosity at 25 ℃ of from 1 to 1,000mm²And has a lower kinematic viscosity than the organosilicon compound.

[ property i): maximum lamellar Length increasing Effect of oil

A first property of the silicone fluid composition is that it increases the maximum lamellar length of the oil with which it is mixed. This property can be objectively defined as a kinematic viscosity of 10.0mm at 25 ℃²Property of increasing the maximum lamellar length of a dimethylpolysiloxane oil by at least 5% with the addition of 1.0 mass% of a silicone fluid composition to a dimethylpolysiloxane oil (hereinafter also referred to as "standard dimethylpolysiloxane oil"), the increase in maximum lamellar length (Δ L%) being defined as the increase in maximum lamellar length [% ]

ΔL％＝(L₁–L₀)/L₀X 100 (%), wherein:

(L₀): kinematic viscosity at 25 ℃ of 10.0mm²Maximum lamellar length of dimethylpolysiloxane oil per s, and

(L₁): the kinematic viscosity at 25 ℃ after 1.0 mass% of the silicone fluid composition had been added thereto was 10.0mm²Maximum lamellar length of dimethylpolysiloxane oil/s.

The lamellar length of the oil is a value measured via a ring method using an automatic tensiometer or the like. There is no particular limitation on the standard dimethylpolysiloxane oil, provided that it has a kinematic viscosity of about 10.0mm at 25 ℃²dimethyl polysiloxane oil (standard product) per second; having this standard viscosity (═ 10.0mm at 25 ℃ C.)²Kinematic viscosity/s) are widely available on the market.

for example, if the maximum lamellar length of a standard dimethylpolysiloxane oil is 2.7mm, whereas the maximum lamellar length of a dimethylpolysiloxane oil is 3.5mm after a given silicone fluid composition has been added to the dimethylpolysiloxane oil to a concentration of 1.0 mass%, Δ L% can be calculated as (3.5-2.7)/2.7 x 100 (%) -29.62 (%); silicone fluid compositions having this property also have the effect of imparting viscoelasticity by increasing the maximum lamellar length, thereby inhibiting oil misting when added to oils other than standard dimethyl polysiloxane oils. It goes without saying that when the silicone fluid composition is used as an oil mist suppressant, an amount other than 1.0 mass% may be added depending on the type of oil to which it is added or the desired oil mist suppressant effect.

In order to obtain the mist suppressant effect efficiently, the maximum lamellar length is increased by preferably 5 to 100%, more preferably 10 to 100%, and particularly preferably 20 to 80%, as measured by the above-described method. If the maximum lamellar length increases by less than 5% when 1.0 mass% of a given silicone fluid composition has been added to a standard dimethylpolysiloxane oil, the effect of imparting viscoelasticity to the oil will be insufficient and sufficient mist suppressant effect may not be obtained. If the increase in the maximum lamellar length is too large, excessive viscoelasticity will be imparted to the oil, and depending on the type of oil and the purpose of treatment, the desired oil treatment effect may be inhibited; therefore, the amount to be added is preferably carefully controlled. If the silicone fluid composition is not sufficiently effective in imparting viscoelasticity to the oil, viscoelasticity can be imparted to the oil by adding a large amount to the oil. However, this is undesirable because the addition of a large amount of the oil mist suppressor is generally uneconomical, and if it is added in a large amount, the original purpose of oil treatment and the treatment effect may not be sufficiently achieved.

The above property i) is an objective definition of the main properties of the silicone fluid composition according to the invention in terms of the increase in maximum lamellar length when a specific amount (1.0 mass%) of the silicone fluid composition is added to a standard dimethylpolysiloxane oil; the silicone fluid composition satisfying this property may be added in an amount other than 1.0 mass% (e.g., less than 1.0 mass% or more than 1.0 mass%), or may be added to a different oil, i.e., a silicone oil other than the above-described standard dimethylpolysiloxane oil, a non-silicone oil, or a mixture thereof, without any limitation. For example, an amount other than 1.0 mass% may be added to one or more types of silicone oils having different kinematic viscosities, or an amount other than 1.0 mass% may be added to a liquid oil (e.g., a hydrocarbon oil, an ester oil, a higher alcohol, etc.) other than the silicone oil or a mixture thereof, without any limitation.

[ property ii): uniform miscibility with oil ]

A second property of the silicone fluid composition is that it has at least some degree of uniform miscibility with the oil. This property can be objectively defined as a kinematic viscosity of 10.0mm at 25 ℃²The property of uniform mixing when 1.0 mass% of the silicone fluid composition was added to the dimethylpolysiloxane oil/s. In this context, "homogeneously mixed" means that the standard dimethylpolysiloxane oil and silicone fluid composition form a substantially homogeneous phase by common mechanical means such as stirring or by diffusion between the liquid phases, and does not include situations where solid matter is present in the mixture or microgels or phase separation is visible. The inability to form a substantially homogeneous phase due to the silicone fluid composition when 1.0 mass% of the silicone fluid composition is added to the standard dimethylpolysiloxane oil means that it will not be able to mix well with the standard dimethylpolysiloxane oil nor with other oils. If such a silicone fluid composition is used as an oil mist suppressor, it cannot be sufficiently mixed with oil, with the result that not only viscoelasticity imparted to the oil is insufficient, but also a solid or gelled substance is formed in the oil, or the oil may separate, and particularly if the composition is used in an oil for treating fibers, yarns, or textiles, a desired treatment effect may be inhibited. Moreover, insufficient mixing with the oil reduces the ease of handling of the mist suppressant.

The above property ii) is an objective definition of the main properties of the silicone fluid composition according to the invention in terms of the presence or absence of uniform miscibility when a specific amount (1.0 mass%) of the silicone fluid composition is added to a standard dimethylpolysiloxane oil; the silicone fluid composition satisfying this property may be added in an amount other than 1.0 mass% (e.g., less than 1.0 mass% or more than 1.0 mass%), or may be added to a different oil, i.e., a silicone oil other than the above-described standard dimethylpolysiloxane oil, a non-silicone oil, or a mixture thereof, without any limitation. For example, even if the oil has a lower uniform miscibility than standard dimethylpolysiloxane oil with the silicone fluid composition, it may be able to be sufficiently uniformly mixed with an addition amount of less than 1.0 mass% that is capable of producing the desired mist suppression effect, in which case the silicone fluid composition constituting the mist suppressant according to the invention is capable of producing the technical effect of imparting viscoelasticity to the oil and suppressing mist.

for ease of handling, it is preferred that the silicone fluid compositions according to the present invention be highly uniformly miscible with oil. In particular, it is preferred that the silicone fluid composition according to the present invention has such properties: the standard dimethylpolysiloxane oil and silicone fluid composition form a substantially homogeneous phase by ordinary mechanical means such as stirring or diffusion between liquid phases, even if an amount of more than 1.0 mass%, such as 5.0 to 50.0 mass% (substantially 1: 1 mixture) is added to the standard dimethylpolysiloxane oil. Such silicone fluid compositions also generally have excellent miscibility with oils other than the standard dimethylpolysiloxane oils described above, and in particular, can be readily added to a wide range of oils used to treat fibers, yarns, and textiles.

[ Silicone fluid composition ]

The type of the silicone fluid composition according to the present invention is not particularly limited as long as it has the above-described properties, and one or more types of silicones can be used; however, for the technical effect and ease of handling of the mist suppressant, it is preferable to use a specific single silicone compound having a high viscoelasticity imparting effect, or a homogeneous mixture of the silicone compound and a specific low-kinematic-viscosity nonpolar silicone oil. Specifically, an organosilicon compound having a high viscoelasticity imparting effect and a relatively low viscosity may be used alone. On the other hand, if the organosilicon compound having a high viscoelasticity imparting effect has a high kinematic viscosity or is insufficient in fluidity, ease of handling at the time of addition or miscibility with oil may decrease; however, by preparing a mixture thereof with a low kinematic viscosity nonpolar silicone oil in advance, the silicone fluid composition as a whole can produce good technical effects and ease of handling in terms of the mist suppressant.

specifically, the silicone fluid composition according to the present invention is characterized by containing:

(A)1 to 100 parts by mass of an organosilicon compound selected from the group consisting of the following component (a1), component (a2), and component (A3), and a mixture of two or more thereof:

(A1) A branched organopolysiloxane comprising one or more branched siloxane units in its molecule, wherein the branched siloxane units are selected from the group consisting of R¹SiO_1.5T units of (wherein R¹Is a monovalent hydrocarbon group) and is composed of SiO_2.0Q unit represented by the formula and a compound represented by the formula (R)² ₂SiO_1.0)_nA chain polysiloxane structure represented by (wherein R is²Is a monovalent hydrocarbon group optionally substituted with a halogen atom, an alkoxy group or a silanol group, and n is a number in the range of 2 to 1,000);

(A2) a crosslinkable organopolysiloxane obtained by reacting

(a1) Cyclic or linear organohydrogendiene polysiloxanes and

(a2) polydimethylsiloxane comprising alkenyl groups at least at both ends of the molecular chain

in the presence of a hydrosilylation catalyst such that the number of moles of alkenyl groups in component (a1) per 1 mole of hydrogen atoms bonded to silicon atoms in component (a2) is in the range of 0.9 to 1.2; and

(A3) A silicone rubber having a kinematic viscosity of 1,000,000-20,000,000mm at 25 ℃²/s or is plastic;

And

(B)99-0 parts by mass of a compound having a kinematic viscosity of 1-1,000mm at 25 DEG C²A nonpolar silicone oil (other than those equivalent to the above-mentioned component (A1) or component (A2))/s.

Another feature is that if the silicone fluid composition is a mixture of the organosilicon compound (a) and the non-polar silicone oil (B), the two are homogeneously mixed.

[ organosilicon Compound (A) ]

The above-mentioned component (a) is an organosilicon compound selected from the group consisting of component (a1), component (a2), component (A3) and a mixture of two or more thereof, and has a shared property of imparting viscoelasticity to the oil by increasing the maximum lamellar length of the oil. As discussed above, these organosilicon compounds (A) may also be used alone. On the other hand, if these components generally have poor uniform miscibility with oil when used alone or have extremely high kinematic viscosity, resulting in poor ease of handling of the mist suppressant, the components may be, and preferably are, used in admixture with a low kinematic viscosity nonpolar silicone oil.

[ (A1) branched organopolysiloxane ]

Component (A1) is a branched organopolysiloxane comprising in its molecule one or more branched siloxane units, wherein the branched siloxane units are selected from the group consisting of R¹SiO_1.5T units of (wherein R¹Is a monovalent hydrocarbon group optionally substituted with a halogen atom) and is composed of SiO_2.0q unit represented by the formula and a compound represented by the formula (R)² ₂SiO_1.0)_nA chain polysiloxane structure represented by (wherein R is²Is a monovalent hydrocarbon group optionally substituted with a halogen atom, an alkoxy group or a silanol group, and n is a number in the range of 2 to 1,000), characterized by having a chain polysiloxane structure branched by a T-branched or Q-branched structure.

in the formula¹or R²Being a monovalent hydrocarbon group optionally substituted with a halogen atom, preferred examples include an alkyl group containing 1 to 12 carbon atoms, such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group or a dodecyl group; alkenyl groups containing 2 to 12 carbon atoms, such as vinyl, allyl or hexenyl groups; an aryl group containing 6 to 12 carbon atoms, such as a phenyl group, a tolyl group, a xylyl group, or a naphthyl group; aralkyl groups containing 7 to 12 carbon atoms, such as benzyl groups or phenethyl groups; and halogen-substituted variants of the above alkyl groups, e.g. 3-chloropropyl groups or 3,3-a trifluoropropyl group; methyl groups, phenyl groups or vinyl groups are preferred industrially.

In the formula, n represents a chain polysiloxane structure extending from a branching unit (R)² ₂SiO_1.0)_nThe degree of polymerization of the moiety, and is preferably a number in the range of 2 to 1,000, particularly preferably a number in the range of 2 to 500 or a number in the range of 100-300. At least two chain polysiloxane structures extending from the branching unit will be present in the same molecule, including when a cyclic structure is formed; however, if n exceeds the above maximum value, the kinematic viscosity will be too large, potentially reducing ease of operation.

A preferred component (A1) is a branched dimethylpolysiloxane in which the molecular chain is terminated by trimethylsiloxy units (M units) or dimethylvinylsiloxy units (M units)^viUnit) is blocked and contains in its molecule one or more radicals selected from the group consisting of one or more SiO_2.0Branched siloxane units of the Q units represented, and preferably having a kinematic viscosity at 25 ℃ of 1,000-100,000mm²In the range of/s. In particular, if the kinematic viscosity of component (A1) at 25 ℃ is at 10,000-100,000mm²In the/s range, then component (a1) is preferably used alone, rather than in admixture with component (B), as this is useful for relatively easy uniform mixing with the oil and producing the desired mist suppression effect. If desired, it is not excluded that a mixture with oil is formed.

[ (A2) crosslinkable organopolysiloxane ]

Component (a2) is a crosslinkable organopolysiloxane that produces a viscous silicone fluid, and is known in the art of non-mist suppressants (see, for example, JP2013-503878a), but its use as an mist suppressant is neither disclosed nor suggested therein, and thus the technical problem solved is different from that of the present invention.

Component (A2) is prepared by reacting

(a1) A cyclic or linear organohydrogendiene polysiloxane, and

(a2) Polydimethylsiloxane comprising alkenyl groups at least at both ends of the molecular chain

A crosslinkable organopolysiloxane obtained by reacting in the presence of a hydrosilylation catalyst such that the number of moles of alkenyl groups in component (a1) per 1 mole of hydrogen atoms bonded to silicon atoms in component (a2) is in the range of 0.9 to 1.2; since the reaction ratio of the alkenyl group to the hydrogen atom bonded to the silicon atom is close to 1.0 at the terminal of the molecular chain, the molecule as a whole has a fine crosslinked structure, and a uniform mixture with the nonpolar silicone oil constituting the component (B) is easily formed in spite of the crosslinkable organopolysiloxane, and there is an advantage that the viscoelasticity of the oil to which it is added can be effectively improved.

Component (a2) is particularly preferably a crosslinkable organopolysiloxane obtained by reacting the above-mentioned raw material components (a1) and (a2) in a nonpolar silicone oil constituting component (B2) in the presence of a hydrosilylation catalyst such that the number of moles of alkenyl groups in component (a1) per 1 mole of hydrogen atoms bonded to silicon atoms in component (a2) is in the range of 0.9 to 1.2; the pre-crosslinking reaction in the non-polar silicone oil yields the advantage of drastically improving the uniform miscibility of the resulting silicone fluid composition as a whole.

Component (a1) is a cyclic or linear organohydrogendiene polysiloxane, and forms a crosslinked structure with component (a2) by a hydrosilylation reaction. The organohydrogendiene polysiloxane is preferably an organopolysiloxane containing at least two hydrogen atoms bonded to silicon atoms per molecule. There are no particular restrictions on the position of the hydrogen atom bonded to the silicon atom in component (a 1); examples include at the ends of the molecular chain and/or on the side chains of the molecular chain. Examples of the organic group bonded to the silicon atom in component (a1) include an alkyl group containing 1 to 12 carbon atoms, such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group or a dodecyl group; aryl groups containing 6 to 12 carbon atoms, such as phenyl groups, tolyl groups, xylyl groups, and naphthyl groups; aralkyl groups containing 7 to 12 carbon atoms, such as benzyl groups and phenethyl groups; and halogen substituted variants of the above alkyl groups, such as 3-chloropropyl and 3,3, 3-trifluoropropyl groups; methyl groups are preferred.

Component (a1) may be cyclic; examples include organohydrogendiene cyclosiloxanes comprising at least two hydrogen atoms bonded to silicon atoms on the siloxane ring and having a siloxane polymerization level (g) of from 3 to 8. Other preferred examples include those represented by the formula [ (CH)₃)HSiO]_g1(wherein g1 is a number in the range of 3-8) or formula [ (CH)₂)₂SiO]_g2[(CH₃)HSiO]_g3(wherein g2+ g3 is a number in the range of from 3 to 8, and g2 and g3 are each greater than 0).

Component (a1) may be chain-like, examples including dimethylhydrogensiloxy terminated dimethylpolysiloxane; dimethylhydrogensiloxy terminated dimethylsiloxane/methylhydrogensiloxane copolymers; trimethylsiloxy-terminated methylhydrogenpolysiloxane; trimethylsiloxy-terminated dimethylsiloxane/methylhydrogensiloxane copolymers; and Comprises (CH)₃)₃SiO_1/2siloxane unit represented by the formula H (CH)₃)₂SiO_1/2Siloxane units represented by and consisting of SiO_4/2an organopolysiloxane of the siloxane unit represented by; linear methylhydrogenpolysiloxanes are preferred.

Component (a2) is a polydimethylsiloxane containing alkenyl groups at least on both ends of the molecular chain, and is a component that, due to the inclusion of the reaction points of component (a1) on both ends of the siloxane molecule, is able to allow engineering of molecules with long average siloxane chain lengths between the crosslinking points and produce an overall moderate crosslink density in the resulting crosslinkable organopolysiloxane. The polydimethylsiloxane preferably contains only about 0 to 2 alkenyl groups in the siloxane side chain, and if the crosslinkable organopolysiloxane of the present invention is used as an oil mist suppressant, the polydimethylsiloxane is preferably a polydimethylsiloxane that contains substantially no alkenyl groups in the siloxane side chain. Preferred examples of the alkenyl group include alkenyl groups containing 2 to 12 carbon atoms, such as vinyl groups, allyl groups, and hexenyl groups.

Preferred component (a2) may be selected from vinyl functional endcapped polydimethyl siliconSiloxane (vinylsiloxane) and hexenyl functional group-terminated polydimethylsiloxane (hexenylsiloxane); in particular, the silicone polymerization level of the polydimethylsiloxane moiety is preferably in the range of 50 to 200,000. More preferably, component (a2) may be selected from the group consisting of₂＝CH)Me₂SiO(Me₂SiO)_dpSiMe₂(CH＝CH₂) Wherein Me is a methyl group and dp is a polymerization degree. In one embodiment dp is at least 50, preferably at least 4,000, especially preferably at least 6,000 or at least 9,000.

The hydrosilylation catalyst is a catalyst that promotes crosslinking via a hydrosilylation reaction between the component (a1) and the component (a2), and examples include a platinum catalyst, a rhodium catalyst, and a palladium catalyst, preferably a platinum catalyst. Examples of the platinum catalyst include finely powdered platinum, hexachloroplatinic acid, alcohol solutions of hexachloroplatinic acid, platinum-alkenylsiloxane complexes, platinum-olefin complexes and platinum-carbonyl complexes, with platinum-alkenylsiloxane complexes being preferred. In particular, 1, 3-divinyl-1, 1,3, 3-tetramethyldisiloxane is preferred because of the good stability of the platinum-alkenylsiloxane complex. Non-platinum metal catalysts such as iron, ruthenium and iron/cobalt may also be used as hydrosilylation-promoting catalysts.

The amount of hydrosilylation catalyst used is an amount effective to promote the crosslinking reaction to obtain a crosslinkable organopolysiloxane. Specifically, the amount of the metal catalyst in the range of 0.01 to 500ppm, more preferably 0.01 to 100ppm, particularly preferably 0.01 to 50ppm per 100 parts by mass of the crosslinkable organopolysiloxane obtained as the sum of the mass of component (a1) and component (a2) is preferable.

The component (a2) of the present invention is characterized in that it is obtained by crosslinking the above-mentioned raw material components (a1) and (a2) so that the number of moles of alkenyl groups (SiVi) in the component (a2) is in the range of 0.9 to 1.2, preferably 0.95 to 1.15, per 1 mole of hydrogen atoms (SiH) bonded to silicon atoms in the component (a 1). The mass ratio represented by SiVi/SiH may be substantially about 1.0 and most preferably is designed to be in the range of 1.0-1.15 to produce a slight excess of SiVi. This gives the advantage that, since substantially equal masses of reactive functional groups in the crosslinkable organopolysiloxane are reacted, there is no residual excess reactive functional groups in the molecule which could lead to oil degradation and the like.

component (A2) according to the invention preferably has a kinematic viscosity at 25% of 1 to 1,000mm²a non-polar silicone oil (B) in s. In such a case, the raw material components (a1) and (a2) may undergo a crosslinking reaction in component (B) in the presence of a hydrosilylation catalyst so that the desired concentration of component (a2) resulting from the crosslinking reaction is present in silicone fluid component (a), or raw material components (a1) and (a2) may be crosslinked in some of component (B) while additional component (B) is added to the mixed composition containing component (a 2). The composition composed of these components (A2) and (B) may be3901Liquid Satin Blend and the like are commercially available.

[ (A3) Silicone rubber ]

Component (A3) is a mixture having a kinematic viscosity at 25 ℃ of 1,000,000-20,000,000mm²Silicone rubber, which is plastic, and is a component having a very high molecular weight, and thus imparts viscoelasticity to a silicone fluid composition containing it therein or an oil to which it has been added, resulting in viscous properties.

The silicone rubber is a high-polymerization polydimethylsiloxane rubber composed of dimethylsiloxy units (D units), and may contain other reactive functional groups and branching units in its molecule. The terminal of the molecular chain is preferably composed of trimethylsiloxy units (M units), dimethylvinylsiloxy units (M units)^Viunits) or dimethylhydroxysiloxy units (M)^OHUnit) is end-capped. Such polydimethylsiloxane rubbers have a molecular weight sufficient to impart at least 1,000,000mm at 25 ℃²Or 2,000,000mm at 25 DEG C²A kinematic viscosity per second, and at 25 ℃ may be 1,000,000-20,000,000mm²And s. Alternatively, the molecular weight of the polydimethylsiloxane rubber can make the level of polymerization extremely high, kinematic viscosity difficult to measure, and the rubber plastic. For example, constituent component (A3) as measured according to American Society for Testing and Materials (ASTM) D926) The silicone rubber of (a) may have a molecular weight that produces Williams plasticity of at least 40, typically in the range of 40-200.

The preparation of silicone rubbers is known in the art and there are many types commercially available, such as DOW1501 FLUID。

[ (B) nonpolar silicone oil constituting the Carrier fluid ]

Component (B) serves as a carrier fluid for component (a) and may, and preferably does, serve as a solvent for the crosslinking reaction, such as component (a 2). Component (B) has a kinematic viscosity of 1-1,000mm at 25 DEG C²A non-polar silicone oil per second. Component (B) is different from component (A) and components (A1) and (A2). The non-polar silicone oil may be volatile.

Examples of suitable non-polar silicone oils for component (B) include volatile cyclic dimethylpolysiloxanes such as hexamethylcyclotrisiloxane (D3), octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5) and dodecamethylcyclohexasiloxane (D6); and dimethylpolysiloxane capped at both ends with trimethylsiloxy groups, methylphenylpolysiloxane capped at both ends with trimethylsiloxy groups, a copolymer of dimethylsiloxane and methylphenylsiloxane capped at both ends with trimethylsiloxy groups, diphenylpolysiloxane capped at both ends with trimethylsiloxy groups, a copolymer of dimethylsiloxane and diphenylsiloxane capped at both ends with trimethylsiloxy groups, trimethylpentaphenyltrisiloxane, phenyl (trimethylsiloxy) siloxane, methylalkylpolysiloxane capped at both ends with trimethylsiloxy groups, a copolymer of dimethylpolysiloxane and methylalkylsiloxane capped at both ends with trimethylsiloxy groups, dimethylsiloxane and methyl (3,3, 3-trifluoropropyl) siloxane copolymer and one or more of alpha, omega-dihydroxy polydimethylsiloxane, any of which has a kinematic viscosity at 25 ℃ of 1 to 1,000mm²。

The nonpolar silicone oil constituting the component (B) preferably does not contain a reactive functional group, and for industrial purposes, is preferably one having a kinematic viscosity at 25 ℃ of 1 to 1,000mm²Linear or cyclic methylpolysiloxanes per second. The kinematic viscosity of the nonpolar silicone oil at 25 ℃ may be and preferably is in the range of 1 to 500mm, as desired²In the range of/s. For compatibility with component (A), ease of handling and industrial productivity, one or more types have a kinematic viscosity at 25 ℃ of 1 to 100mm²linear or cyclic nonpolar silicone oil (selected from the group consisting of those having a kinematic viscosity of 1-10mm at 25 ℃)²Linear polydimethylsiloxanes, octamethylcyclotetrasiloxane, and decamethylcyclopentasiloxane per s) are the most preferred and inexpensive carrier fluids.

[ preferred preparation of Silicone fluid composition ]

the silicone fluid composition of the present invention may be component (a) alone, or a mixture of the silicone compound constituting component (a) and the nonpolar silicone oil carrier fluid constituting component (B) as necessary. The mixture can be obtained by homogeneously mixing via mechanical force using an apparatus such as a homomixer, paddle mixer, Henschel mixer, homodisperser, colloid mill, propeller stirrer or vacuum mixer or, as in the case of component (A2), by using component (B) as a reaction solvent and a crosslinking reaction product carrier fluid to obtain a homogeneous mixture of crosslinkable starting material components.

For ease of handling and technical effect of the mist suppressant, the kinematic viscosity at 25 ℃ is 10,000-100,000mm²Component (a1) per second may be used alone as the silicone fluid composition if component (a) consists only of component (a 1).

Meanwhile, if the silicone fluid composition according to the invention is a mixture of the silicone compound constituting component (a) and the nonpolar silicone oil carrier fluid constituting component (B), the proportion thereof is not particularly limited as long as the resulting silicone fluid composition can exhibit the above-described properties; however, for ease of handling and technical effects of the mist suppressant, it is preferably 5 to 20 parts by mass of component (a) and 95 to 80 parts by mass of component (B), more preferably 5 to 15 parts by mass of component (a) and 95 to 85 parts by mass of component (B). If component (A) is an organosilicon compound composed of component (A2) or component (A3) as described above, it is particularly preferred that the silicone fluid composition of the present invention is a mixture as described above.

Although there is no particular limitation on the kinematic viscosity of the silicone fluid composition, it is preferably 100-000,000 mm at 25 ℃ for ease of handling and technical effect of the mist suppressant²s, more preferably 500-1,500,000mm²/s。

[ relationship with thickening Properties ]

the silicone fluid composition according to the present invention acts as an oil mist suppressant by uniformly mixing with the oil and imparting viscoelasticity to the oil to which it is added. Meanwhile, although some known silicone-based mist suppressants have the effect of increasing kinematic viscosity by thickening the oil or coating agent alone, a suppressor lacking the effect of imparting viscoelasticity to the oil and increasing its maximum lamellar length will not be able to function or be insufficient as an mist suppressant, which is the object of the present invention, even if the suppressor has such thickening effect. In other words, the oil thickening effect does not constitute a major technical means to solve the problem in the silicone fluid composition according to the invention, and any change in the oil viscosity is preferably slight.

[ use of Silicone fluid composition as mist suppressant ]

The invention features the use of the above-described silicone fluid composition as an oil mist suppressant. As discussed in connection with the silicone fluid described above, one preferred embodiment is the use of the following silicone fluid composition as an oil mist suppressant, the silicone fluid composition containing:

(A)1 to 100 parts by mass of an organosilicon compound selected from the group consisting of the following component (a1), component (a2), and component (A3), and a mixture of two or more thereof:

(A1) A branched organopolysiloxane comprising one or more branched siloxane units in its molecule, wherein the branched siloxane units are selected from the group consisting of R¹SiO_1.5T units of (wherein R¹Is a monovalent hydrocarbon optionally substituted by halogen atomsgroup) and from SiO_2.0q unit represented by the formula and a compound represented by the formula (R)² ₂SiO_1.0)_nA chain polysiloxane structure represented by (wherein R is²Is a monovalent hydrocarbon group optionally substituted with a halogen atom, an alkoxy group or a silanol group, and n is a number in the range of 2 to 1,000);

(A2) A crosslinkable organopolysiloxane obtained by reacting

(a1) Cyclic or linear organohydrogendiene polysiloxanes and

(a2) Polydimethylsiloxane comprising alkenyl groups at least at both ends of the molecular chain

In the presence of a hydrosilylation catalyst such that the number of moles of alkenyl groups in component (a1) per 1 mole of hydrogen atoms bonded to silicon atoms in component (a2) is in the range of 0.9 to 1.2; and

(A3) A kinematic viscosity of 1,000,000-20,000,000mm at 25 DEG C²(ii)/s or silicone rubber which is plastic; and

(B)99-0 parts by mass of a compound having a kinematic viscosity of 1-1,000mm at 25 DEG C²A nonpolar silicone oil (other than those equivalent to the above-mentioned component (A1) or component (A2)); and having the following properties i) and ii). Another feature is that if the silicone fluid composition is a mixture of the organosilicon compound (a) and the non-polar silicone oil (B), the two are homogeneously mixed.

i) The kinematic viscosity at 25 ℃ is 10.0mm²Property to increase the maximum lamellar length of the dimethylpolysiloxane oil by at least 5% when 1.0 mass% of the silicone fluid composition is added to the dimethylpolysiloxane oil; and

ii) and a kinematic viscosity at 25 ℃ of 10.0mm²The oil of dimethylpolysiloxane (D) is homogeneously miscible.

[ oil ]

The invention also provides an oil containing an oil mist suppressant composed of the above silicone fluid composition. There is no particular limitation on the oil with which the mist suppressant according to the invention can be used, and the invention is particularly suitable for use with fibre treatment oils, spinning oils or textile treatment oils. Such oils tend to be subjected to tensile and tear stresses during processing, and the use of an oil mist suppressant according to the invention will have the beneficial effect of being very effective in suppressing the formation of oil mist during processing.

More particularly, the present invention relates to an oil mist suppressant for a spinning oil used for producing fibers, wherein a force acts on the oil during oil treatment used in the spinning process. The base oil of the oil may be any base oil generally used for such purposes, and may be a single type or a mixture of two or more types of oils. Examples include natural animal and vegetable oils and fats, semi-synthetic oils, hydrocarbon oils, polyethylene glycols, phenyl ethers, ester oils, silicone oils, and fluorine-based oils. Particularly preferably having a kinematic viscosity of 1 to 1,000mm at 25 DEG C²a silicone oil or ester oil in s. For industrial purposes, kinematic viscosities of from 1 to 1,000mm at 25 ℃ are preferred²Polydimethylsiloxane,/s; one type or a mixture of two or more types may be used.

Non-limiting examples of the types of fibers treated with oil containing an oil mist suppressant include polyester elastic fibers, polyamide elastic fibers, polyolefin elastic fibers, and polyurethane elastic fibers.

The amount of the oil mist inhibitor according to the present invention added to the oil is preferably 0.001 to 10 mass%, more preferably 0.01 to 3 mass%. The addition of the mist suppressant in an amount exceeding the maximum value does not necessarily further improve the mist suppressant effect. Adding an amount less than the minimum value may not produce sufficient mist suppressant effect and is otherwise uneconomical. The oil may be prepared according to a known method without any particular limitation. Any method of treating fibers, yarns, textiles, etc. known to those skilled in the art with oil may be used without any particular limitation.

Known additives may be included in the oil as needed. Examples of such additives include organomodified silicone oils other than the organosilicon compound of the present invention, silicone resins, oiliness agents, extreme pressure additives, organic acid salts, antioxidants, lubricants, film thickeners, rust inhibitors, antifoaming agents, metal deactivators, binders typified by nonionic surfactants and higher alcohols, antistatic agents typified by ionic surfactants, wetting agents, UV absorbers, antioxidants, leveling agents, antistatic agents, and preservatives. The mist suppressant composed of a high molecular weight organic compound may be contained in the oil to such an extent that the effect of the present invention is not inhibited. The addition amount of the additive may be appropriately adjusted according to a known method to such an extent that the effect of the present invention is not inhibited.