阅读说明：本技术 一种聚硅氧烷-11的凝胶弹性体及其制备方法 (Gel elastomer of polysiloxane-11 and preparation method thereof ) 是由 刘斌 于 2020-04-08 设计创作，主要内容包括：本发明涉及有机硅弹性体技术领域,具体涉及到一种聚硅氧烷-11的凝胶弹性体及其制备方法。包括以下制备原料：低粘度二甲基硅油、乙烯基封端的聚硅氧烷、催化剂；所述低粘度二甲基硅油、乙烯基封端的聚硅氧烷的质量比为(2-4)：1。本发明所述的聚硅氧烷-11的凝胶弹性体,不含D5,低挥发且对皮肤无刺激,并且吸收好,透气不粘腻,具有非常理想的保湿、营养修复、遮盖细纹的作用。可适用于眼部及敏感皮肤的保湿修复。(The invention relates to the technical field of organic silicon elastomers, in particular to a polysiloxane-11 gel elastomer and a preparation method thereof. The method comprises the following preparation raw materials: low viscosity dimethyl silicone oil, vinyl-terminated polysiloxane, catalyst; the mass ratio of the low-viscosity dimethyl silicone oil to the vinyl-terminated polysiloxane is (2-4): 1. the gel elastomer of polysiloxane-11 does not contain D5, has low volatility, no stimulation to skin, good absorption, air permeability and no stickiness, and has ideal effects of moisturizing, nourishing and repairing and covering fine wrinkles. Can be used for moisturizing and repairing eyes and sensitive skin.)

1. The gel elastomer of polysiloxane-11 is characterized by comprising the following preparation raw materials: low viscosity dimethyl silicone oil, vinyl-terminated polysiloxane, catalyst; the mass ratio of the low-viscosity dimethyl silicone oil to the vinyl-terminated polysiloxane is (2-4): 1.

2. the silicone-11 gel elastomer of claim 1, wherein the mass ratio of the low viscosity dimethylsilicone oil to the vinyl terminated silicone is 3: 1.

3. the silicone-11 gel elastomer according to claim 1, wherein the low viscosity dimethylsilicone oil has a viscosity of 1 to 10 mPa-s.

4. The silicone-11 gel elastomer of claim 3, wherein the low viscosity dimethylsilicone fluid has a viscosity of 1 to 5 mPa-s.

5. The silicone-11 gel elastomer of claim 1, wherein the vinyl terminated silicone has a viscosity of 50 to 150 mPa-s.

6. The silicone-11 gel elastomer of claim 5, wherein the vinyl terminated silicone has a viscosity of 50 to 100 mPa-s.

7. The polysiloxane-11 gel elastomer of claim 1, wherein the catalyst is selected from any one of platinum group catalysts, acidic catalysts, and basic catalysts.

8. The silicone-11 gel elastomer of claim 7, wherein the catalyst is a platinum group catalyst.

9. A process for the preparation of a silicone-11 gel elastomer according to any one of claims 2 to 8, characterized in that it comprises the following steps: mixing the preparation raw materials according to the formula amount, and shearing by a shearing machine to obtain the composite material.

Technical Field

The invention belongs to the technical field of organic silicon elastomers, and particularly relates to a polysiloxane-11 gel elastomer and a preparation method thereof.

Background

Silicone elastomer gels are typically prepared by dispersing a cross-linked, high molecular weight silicone powder into a small molecule carrier fluid. The natural plant extract is used as a common raw material in high-grade cosmetics, has hunting application range in hair washing, hair care, skin care and color cosmetics, and has large market demand. Many of these silicone elastomers, however, have limited compatibility with various personal care ingredients, personal care actives and healthcare actives. Meanwhile, the high-viscosity silicone elastomer gel has the defects of difficult ventilation, poor permeability and the like when being applied to the field of cosmetics.

Disclosure of Invention

In order to solve the above problems, the present invention provides, in a first aspect, a silicone-11 gel elastomer comprising the following preparation raw materials: low viscosity dimethyl silicone oil, vinyl-terminated polysiloxane, catalyst; the mass ratio of the low-viscosity dimethyl silicone oil to the vinyl-terminated polysiloxane is (2-4): 1.

as a preferable technical solution, the mass ratio of the low viscosity dimethylsilicone oil to the vinyl terminated polysiloxane is 3: 1.

as a preferable technical scheme, the viscosity of the low-viscosity dimethyl silicone oil at 25 ℃ is 1-10 mPa.s.

As a preferred technical scheme, the low-viscosity dimethyl silicone oil has the viscosity of 1-5 mPa.s at 25 ℃.

As a preferred embodiment, the vinyl-terminated polysiloxane has a viscosity of 50 to 150 mPas at 25 ℃.

As a preferred embodiment, the vinyl-terminated polysiloxane has a viscosity of 50 to 100 mPas at 25 ℃.

As a preferable technical scheme, the catalyst is selected from any one of platinum group catalysts, acid catalysts and basic catalysts.

As a preferred technical scheme, the catalyst is a platinum catalyst.

As a preferred technical scheme, the content of the catalyst is less than 10 ppm.

In a second aspect, the present invention provides a process for preparing a silicone-11 gel elastomer, comprising the steps of: mixing the preparation raw materials according to the formula amount, and shearing by a high-speed shearing machine to obtain the composite material.

Has the advantages that: the gel elastomer of polysiloxane-11 of the present invention is obtained by dispersing a cross-linked polysiloxane-11 obtained by cross-linking a low-viscosity high-content vinyl-terminated polysiloxane in a low-viscosity dimethylsilicone oil. The low-viscosity dimethyl silicone oil disclosed by the invention is non-volatile, does not contain D5, is milder, low in irritation, lighter and thinner in formed film, breathable, better in repairing effect on skin and more environment-friendly; the cross-linked polysiloxane-11 formed by cross-linking the vinyl-terminated polysiloxane with low viscosity and high content has the advantages of low viscosity, high content, more complete and uniform cross-linking, low molecular weight, easier dispersion of the polysiloxane-11 in low-viscosity dimethyl silicone oil, more uniform spherical silicon gel particles and fine grain filling effect. Meanwhile, the catalyst used in the invention has low content, no residue after reaction and safer use. The polysiloxane-11 gel elastomer can be suitable for moisturizing and repairing eyes and sensitive skin, has high moisturizing and oil control effects if being used for high-grade eye essence and color cosmetic products, is easier to spread, has good skin adhesion, and can quickly and durably cover fine lines and pores.

Detailed Description

The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.

The term "prepared from …" as used herein is synonymous with "including". As used herein, the terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

The conjunction "consisting of …" excludes any unspecified elements, steps or components. If used in a claim, the phrase will render the claim closed except for the materials described, except for the conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.

When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.

The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.

Approximating language, as used herein in the specification and claims, is intended to modify a quantity, such that the invention is not limited to the specific quantity, but includes portions that are literally received by modifying or otherwise modifying such quantity without substantially changing the basic function to which it is related. Accordingly, the use of "about" to modify a numerical value means that the invention is not limited to the precise value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.

In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.

In view of the above technical problems, the present invention provides, in a first aspect, a silicone-11 gel elastomer comprising the following preparation raw materials: low viscosity dimethyl silicone oil, vinyl-terminated polysiloxane, catalyst; the mass ratio of the low-viscosity dimethyl silicone oil to the vinyl-terminated polysiloxane is (2-4): 1.

in a preferred embodiment, the mass ratio of the low viscosity dimethylsilicone oil to the vinyl terminated polysiloxane is 3: 1.

low-viscosity dimethyl silicone oil

The low-viscosity dimethyl silicone oil is named low-polymerization dimethyl siloxane and is transparent, tasteless, non-sticky and non-irritant transparent liquid. Can be used as basic oil phase component or temporary carrier of active substance, and has improved spreadability and easy application. It also acts as a low viscosity silicone which further reduces the slimy feel of the formulation and also reduces surface tension, aids spreading and promotes uniform dispersion of the solid pigment.

In a preferred embodiment, the low viscosity dimethylsilicone fluid has a viscosity of 1 to 10mPa · s at 25 ℃.

In a more preferred embodiment, the low viscosity dimethylsilicone fluid has a viscosity of 1 to 5mPa · s at 25 ℃.

The low viscosity dimethicone was purchased from Dow Corning.

Vinyl terminated polysiloxanes

When the vinyl-terminated polysiloxane provided by the invention is subjected to crosslinking reaction, two ends of the polysiloxane can be anchored to form crosslinking points, and a polymer midchain link has chain motion property.

In a preferred embodiment, the vinyl-terminated polysiloxane has a viscosity of from 50 to 150mPa · s at 25 ℃.

In a more preferred embodiment, the vinyl-terminated polysiloxane has a viscosity of 50 to 100mPa · s at 25 ℃; more preferably, the vinyl-terminated polysiloxane has a viscosity of 50 mPas at 25 ℃.

The vinyl-terminated polysiloxane was purchased from dow corning corporation.

Catalyst and process for preparing same

In one embodiment, the catalyst is selected from any one of a platinum group catalyst, an acid catalyst, a basic catalyst.

In a preferred embodiment, the catalyst is a platinum group catalyst.

In a preferred embodiment, the catalyst content is less than 10 ppm.

In a preferred embodiment, the platinum group catalyst is selected from one or more of the group consisting of Pt-56150D, Pt-56100D, Pt-56701D of UMICORE noble metals chemical Co.

In a most preferred embodiment, the catalyst is Pt-56150D.

In a second aspect, the present invention provides a process for preparing a silicone-11 gel elastomer, comprising the steps of: mixing the preparation raw materials according to the formula amount, reacting at 60-80 ℃ for 30-60min, and shearing by a high-speed shearing machine to obtain the composite material.

The mechanism is explained as follows: the inventor finds that the gel elastomer of polysiloxane-11 obtained by dispersing the cross-linked polysiloxane-11 formed by cross-linking the low-viscosity high-content vinyl-terminated polysiloxane in the low-viscosity dimethyl silicone oil has no stimulation to the skin, enables the skin to be finer and smoother, is breathable and not sticky, and has very ideal effects of moisturizing and nutrition restoration. Probably because the low viscosity dimethyl silicone oil and vinyl-terminated polysiloxane have good molecule flexibility and small surface tension; in addition, the silicon-oxygen bond of the water-based moisture-retaining agent and the hydrogen and oxygen in the water molecule form a hydrogen bond, thereby increasing the moisture-retaining effect. In addition, the invention selects platinum group catalyst, which can obtain products with better performance. The possible reason is that if a basic catalyst is selected, it easily brings moisture into the system, increasing hydroxyl-terminated products and low-boiling products; if an acidic catalyst is selected, the work-up is complicated. The platinum group catalyst of the present invention does not solve the problems of the above catalysts, but can also cooperate with vinyl terminated polysiloxane to achieve normal vulcanization level.