阅读说明：本技术 一种可降解密封胶生产工艺 (Production process of degradable sealant ) 是由 唐川 李相勇 别波 于 2021-10-05 设计创作，主要内容包括：本发明公开了一种可降解密封胶生产工艺,具体包括以下步骤：S1、配料：首先通过称量设备分别量取所需重量比份的天然复合橡胶、丁腈橡胶、硬脂酸钠、生物降解料、光催化剂、天然植物纤维、环氧植物油、白炭黑、表面活性剂、抗氧剂、固化剂、增塑剂和硫化促进剂,S2、炼胶处理,S3、混炼处理,S4、混合,本发明涉及密封胶加工技术领域。该可降解密封胶生产工艺,可实现通过采用天然橡胶材料代替合成橡胶,使密封胶更容易降解,很好的达到了通过采用光催化剂和降解材料的加入,来使废弃的橡胶密封胶能够快速降解的目的,实现了节能环保,增强了降解效果,从而大大方便了废弃橡胶密封胶的回收处理。(The invention discloses a production process of degradable sealant, which specifically comprises the following steps: s1, batching: firstly, respectively weighing natural composite rubber, nitrile rubber, sodium stearate, biodegradable materials, a photocatalyst, natural plant fibers, epoxy vegetable oil, white carbon black, a surfactant, an antioxidant, a curing agent, a plasticizer and a vulcanization accelerator in required parts by weight by using weighing equipment, S2, carrying out rubber mixing treatment, S3, carrying out mixing treatment, and S4, and mixing. This degradable sealant production technology can realize through adopting the natural rubber material to replace synthetic rubber, makes sealed glue degrade more easily, fine reached through adopting photocatalyst and degradation material's addition, make the purpose that discarded rubber sealed glue can degrade fast, realized energy-concerving and environment-protective, strengthened the degradation effect to made things convenient for the recovery processing of discarded rubber sealed glue greatly.)

1. A production process of degradable sealant is characterized by comprising the following steps: the method specifically comprises the following steps:

s1, batching: firstly, respectively weighing natural composite rubber, nitrile rubber, sodium stearate, biodegradable materials, a photocatalyst, natural plant fibers, epoxy plant oil, white carbon black, a surfactant, an antioxidant, a curing agent, a plasticizer and a vulcanization accelerator in required parts by weight through weighing equipment;

s2, rubber refining: pouring the natural composite rubber and the nitrile rubber weighed in the step S1 into rubber mixing equipment, and plasticating for 25-40min at the temperature of 120-190 ℃;

s3, mixing treatment: respectively adding the sodium stearate, the biodegradable material, the natural plant fiber and the white carbon black measured in the step S1 into the mixing equipment in the step S2, mixing for 1-2h, uniformly mixing, cooling and cutting into mixed rubber particles;

s4, mixing: and (3) adding the photocatalyst, the epoxy vegetable oil, the surfactant, the antioxidant, the curing agent, the plasticizer and the vulcanization accelerator which are weighed in the step S1 into a reaction kettle according to the weight part ratio, adding the colloidal particles obtained after the mixing in the step S3 into the reaction kettle, and stirring at the rotation speed of 500 plus materials and 800r/min until the colloidal liquid is uniform, thereby obtaining the sealant finished product.

2. The production process of the degradable sealant according to claim 1, which is characterized in that: the sealant weighed in the step S1 comprises the following raw materials in parts by weight: 10-20 parts of natural composite rubber, 5-10 parts of nitrile rubber, 3-5 parts of sodium stearate, 5-10 parts of biodegradable material, 3-5 parts of photocatalyst, 5-10 parts of natural plant fiber, 5-10 parts of epoxy vegetable oil, 3-5 parts of white carbon black, 3-5 parts of surfactant, 3-5 parts of antioxidant, 3-5 parts of curing agent, 3-5 parts of plasticizer and 3-5 parts of vulcanization accelerator.

3. The process for producing a degradable sealant according to claim 1 or 2, wherein: the antioxidant is one of trioctyl ester, tridecyl ester, tridodecyl alcohol ester or trihexadecyl alcohol ester.

4. The process for producing a degradable sealant according to claim 1 or 2, wherein: the curing agent is one of alkenyl triamine or diaminocyclohexane.

5. The process for producing a degradable sealant according to claim 1 or 2, wherein: the vulcanization accelerator is prepared by mixing DM, NS and hydrogen peroxide, and the mass addition ratio of the substances is 3:2:3 in sequence.

6. The process for producing a degradable sealant according to claim 1 or 2, wherein: the natural composite rubber is a combination of two or more of smoked sheet rubber, granulated rubber, crepe rubber or latex.

7. The process for producing a degradable sealant according to claim 1 or 2, wherein: the biodegradable material is PHA biodegradable mother material.

8. The process for producing a degradable sealant according to claim 1 or 2, wherein: the photocatalyst is one of titanium dioxide, zinc oxide, tin oxide, zirconium dioxide or cadmium sulfide.

9. The process for producing a degradable sealant according to claim 1 or 2, wherein: the natural plant fiber is one or the combination of two of hydrogenated rosin fiber and lignin fiber.

Technical Field

The invention relates to the technical field of sealant processing, in particular to a production process of degradable sealant.

Background

The sealing glue is an adhesive for filling a configured gap to play a role in sealing, mainly causes a sealing material which is deformed along with the shape of a sealing surface, is not easy to flow and has certain cohesiveness, is divided into three categories of elastic sealing glue, liquid sealing padding and sealing putty, has the functions of leakage prevention, water prevention, vibration prevention, sound insulation, heat insulation and the like, and is widely used for sealing buildings, transportation, electronic instruments and parts. The sealant is prepared by taking dry or non-dry sticky substances such as asphaltum, natural resin or synthetic resin, natural rubber or synthetic rubber and the like as base materials, matching inert fillers such as talcum powder, argil, carbon black, titanium pigment, asbestos and the like, and then adding a plasticizer, a solvent, a curing agent, an accelerant and the like, is a flowing or extruding amorphous material to fill up a closed joint, can rely on embedded drying, temperature change, solvent volatilization and stability of a chemical crosslinking material, and gradually forms a solid glue, a viscoelastic or elastic sealing material, and in order to ensure a sealing function, the sealant has the following basic characteristics:

the filling is good, the storage stability is good, and the filling is non-toxic or low-toxic; liquid, gas;

low permeability with other matrix or base material;

joints capable of resisting stretching movement, displacement and deformation;

fourthly, no obvious shrinkage is caused;

fifthly, the product has certain pressure resistance.

The existing sealant has poor degradation effect, because the rubber sealant is difficult to recycle after being used for the first time, the dismantled waste rubber cannot be effectively recycled and is discarded in the environment, because the natural degradation is difficult, the natural rubber material can not be adopted to replace the synthetic rubber, the sealant can be more easily degraded, the aim of quickly degrading the waste rubber sealant by adopting the photocatalyst and the degradation material can not be fulfilled, the energy conservation and environmental protection can not be realized, and the great inconvenience is brought to the recovery treatment of the waste rubber sealant.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a production process of a degradable sealant, which solves the problems that the degradation effect of the existing sealant is poor, the rubber sealant is difficult to recycle after being used for the first time, the waste rubber after being dismantled can not be effectively recycled and discarded in the environment, and because the natural degradation is difficult, the sealant can not be degraded easily by adopting a natural rubber material to replace synthetic rubber, the aim of quickly degrading the waste rubber sealant by adopting a photocatalyst and a degradation material can not be fulfilled, and the energy conservation and environmental protection can not be realized.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a production process of degradable sealant specifically comprises the following steps:

s1, batching: firstly, respectively weighing natural composite rubber, nitrile rubber, sodium stearate, biodegradable materials, a photocatalyst, natural plant fibers, epoxy plant oil, white carbon black, a surfactant, an antioxidant, a curing agent, a plasticizer and a vulcanization accelerator in required parts by weight through weighing equipment;

s2, rubber refining: pouring the natural composite rubber and the nitrile rubber weighed in the step S1 into rubber mixing equipment, and plasticating for 25-40min at the temperature of 120-190 ℃;

s3, mixing treatment: respectively adding the sodium stearate, the biodegradable material, the natural plant fiber and the white carbon black measured in the step S1 into the mixing equipment in the step S2, mixing for 1-2h, uniformly mixing, cooling and cutting into mixed rubber particles;

s4, mixing: and (3) adding the photocatalyst, the epoxy vegetable oil, the surfactant, the antioxidant, the curing agent, the plasticizer and the vulcanization accelerator which are weighed in the step S1 into a reaction kettle according to the weight part ratio, adding the colloidal particles obtained after the mixing in the step S3 into the reaction kettle, and stirring at the rotation speed of 500 plus materials and 800r/min until the colloidal liquid is uniform, thereby obtaining the sealant finished product.

Preferably, the sealant raw material weighed in the step S1 includes, by weight: 10-20 parts of natural composite rubber, 5-10 parts of nitrile rubber, 3-5 parts of sodium stearate, 5-10 parts of biodegradable material, 3-5 parts of photocatalyst, 5-10 parts of natural plant fiber, 5-10 parts of epoxy vegetable oil, 3-5 parts of white carbon black, 3-5 parts of surfactant, 3-5 parts of antioxidant, 3-5 parts of curing agent, 3-5 parts of plasticizer and 3-5 parts of vulcanization accelerator.

Preferably, the antioxidant is one of trioctyl ester, tridecyl ester, tridodecyl alcohol ester or trihexadecyl alcohol ester.

Preferably, the curing agent is one of an alkenyl triamine or a diaminocyclohexane.

Preferably, the vulcanization accelerator is prepared by mixing DM, NS and hydrogen peroxide, and the mass addition ratio of the substances is 3:2:3 in sequence.

Preferably, the natural composite rubber is a combination of two or more of smoked sheet rubber, granulated rubber, crepe rubber and latex.

Preferably, the biodegradable material is a PHA biodegradable master batch.

Preferably, the photocatalyst is one of titanium dioxide, zinc oxide, tin oxide, zirconium dioxide or cadmium sulfide.

Preferably, the natural plant fiber is one or a combination of two of hydrogenated rosin fiber and lignin fiber.

(III) advantageous effects

The invention provides a production process of degradable sealant. Compared with the prior art, the method has the following beneficial effects: the production process of the degradable sealant specifically comprises the following steps: s1, batching: firstly, respectively measuring the required parts by weight of natural composite rubber, nitrile rubber, sodium stearate, biodegradable materials, photocatalyst, natural plant fiber, epoxy plant oil, white carbon black, a surfactant, an antioxidant, a curing agent, a plasticizer and a vulcanization accelerator by weighing equipment, and S2, mixing rubber: pouring the natural composite rubber and the nitrile rubber weighed in the step S1 into rubber mixing equipment, plasticating for 25-40min at the temperature of 120-190 ℃, and carrying out mixing treatment S3: respectively adding the sodium stearate, the biodegradable material, the natural plant fiber and the white carbon black measured in the step S1 into the mixing equipment in the step S2, mixing for 1-2h, uniformly mixing, cooling and cutting into mixed colloidal particles, and S4, mixing: adding the photocatalyst, the epoxy vegetable oil, the surfactant, the antioxidant, the curing agent, the plasticizer and the vulcanization accelerator weighed in the step S1 into a reaction kettle according to the weight part ratio, adding the colloidal particles obtained after the mixing in the step S3 into the reaction kettle, and stirring the colloidal particles at the rotation speed of 500 plus materials at 800r/min until the colloidal liquid is uniform to obtain the sealant finished product.

Drawings

FIG. 1 is a flow chart of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, an embodiment of the present invention provides five technical solutions: a production process of degradable sealant specifically comprises the following embodiments:

example 1

A production process of degradable sealant specifically comprises the following steps:

s1, batching: firstly, respectively weighing 15 parts of natural composite rubber, 7 parts of nitrile rubber, 4 parts of sodium stearate, 7 parts of biodegradable material, 4 parts of photocatalyst, 7 parts of natural plant fiber, 7 parts of epoxy vegetable oil, 4 parts of white carbon black, 4 parts of surfactant, 4 parts of antioxidant, 4 parts of curing agent, 4 parts of plasticizer and 4 parts of vulcanization accelerator by using weighing equipment, wherein the antioxidant is trioctyl, the curing agent is alkenyl triamine, the vulcanization accelerator is DM, NS and hydrogen peroxide, and the mass adding proportion of the components is 3:2:3 in sequence, the natural composite rubber is a composition of smoked sheet rubber, granular rubber, crepe rubber and latex, the biodegradable material is a composition of PHA biodegradable master batch, the photocatalyst is titanium dioxide, and the natural plant fiber is hydrogenated rosin fiber and lignin fiber;

s2, rubber refining: pouring the natural composite rubber and the nitrile rubber weighed in the step S1 into rubber mixing equipment, and plasticating for 33min at the temperature of 170 ℃;

s3, mixing treatment: respectively adding the sodium stearate, the biodegradable material, the natural plant fiber and the white carbon black measured in the step S1 into the mixing equipment in the step S2, mixing for 1.5h, uniformly mixing, cooling and cutting into mixed rubber particles;

s4, mixing: and (3) adding the photocatalyst, the epoxy vegetable oil, the surfactant, the antioxidant, the curing agent, the plasticizer and the vulcanization accelerator which are weighed in the step (S1) into a reaction kettle according to the weight part ratio, adding the colloidal particles obtained after the mixing in the step (S3) into the reaction kettle, and stirring at the rotation speed of 700r/min until the colloidal liquid is uniform, thereby obtaining the sealant finished product.

Example 2

A production process of degradable sealant specifically comprises the following steps:

s1, batching: firstly, respectively weighing 10 parts of natural composite rubber, 5 parts of nitrile rubber, 3 parts of sodium stearate, 5 parts of biodegradable material, 3 parts of photocatalyst, 3 parts of natural plant fiber, 5 parts of epoxy vegetable oil, 3 parts of white carbon black, 3 parts of surfactant, 3 parts of antioxidant, 3 parts of curing agent, 3 parts of plasticizer and 3 parts of vulcanization accelerator by using weighing equipment, wherein the antioxidant is tridecyl ester, the curing agent is diaminocyclohexane, the vulcanization accelerator is prepared by mixing DM, NS and hydrogen peroxide, the mass addition ratio of the components is 3:2:3 in sequence, the natural composite rubber is a composition of smoked sheet rubber and granular rubber, the biodegradable material is a PHA biodegradable master batch, the photocatalyst is zinc oxide, and the natural plant fiber is hydrogenated rosin fiber;

s2, rubber refining: pouring the natural composite rubber and the nitrile rubber weighed in the step S1 into rubber mixing equipment, and plasticating for 25min at the temperature of 120 ℃;

s3, mixing treatment: respectively adding the sodium stearate, the biodegradable material, the natural plant fiber and the white carbon black measured in the step S1 into the mixing equipment in the step S2, mixing for 1 hour, uniformly mixing, cooling and cutting into mixed rubber particles;

s4, mixing: and (3) adding the photocatalyst, the epoxy vegetable oil, the surfactant, the antioxidant, the curing agent, the plasticizer and the vulcanization accelerator which are weighed in the step (S1) into a reaction kettle according to the weight part ratio, adding the colloidal particles obtained after the mixing in the step (S3) into the reaction kettle, and stirring at the rotation speed of 500r/min until the colloidal liquid is uniform, thereby obtaining the sealant finished product.

Example 3

A production process of degradable sealant specifically comprises the following steps:

s1, batching: firstly, weighing 20 parts of natural composite rubber, 10 parts of nitrile rubber, 5 parts of sodium stearate, 10 parts of biodegradable material, 5 parts of photocatalyst, 10 parts of natural plant fiber, 10 parts of epoxy vegetable oil, 5 parts of white carbon black, 5 parts of surfactant, 5 parts of antioxidant, 5 parts of curing agent, 5 parts of plasticizer and 5 parts of vulcanization accelerator by using weighing equipment, wherein the antioxidant is tri (dodecyl) ester, the curing agent is alkenyl triamine, the vulcanization accelerator is prepared by mixing DM, NS and hydrogen peroxide, the mass addition ratio of the components is 3:2:3 in sequence, the natural composite rubber is a composition of crepe rubber and latex, the biodegradable material is a biodegradable master batch adopting PHA, the photocatalyst is tin oxide, and the natural plant fiber is lignin fiber;

s2, rubber refining: pouring the natural composite rubber and the nitrile rubber weighed in the step S1 into rubber mixing equipment, and plasticating for 40min at the temperature of 190 ℃;

s3, mixing treatment: respectively adding the sodium stearate, the biodegradable material, the natural plant fiber and the white carbon black measured in the step S1 into the mixing equipment in the step S2, mixing for 2 hours, uniformly mixing, cooling and cutting into mixed rubber particles;

s4, mixing: and (3) adding the photocatalyst, the epoxy vegetable oil, the surfactant, the antioxidant, the curing agent, the plasticizer and the vulcanization accelerator which are weighed in the step (S1) into a reaction kettle according to the weight part ratio, adding the colloidal particles obtained after the mixing in the step (S3) into the reaction kettle, and stirring at the rotating speed of 800r/min until the colloidal liquid is uniform, thereby obtaining the sealant finished product.

Example 4

A production process of degradable sealant specifically comprises the following steps:

s1, batching: firstly, weighing 12 parts of natural composite rubber, 6 parts of nitrile rubber, 3.5 parts of sodium stearate, 6 parts of biodegradable material, 3.5 parts of photocatalyst, 6 parts of natural plant fiber, 6 parts of epoxy vegetable oil, 3.5 parts of white carbon black, 3.5 parts of surfactant, 3.5 parts of antioxidant, 3.5 parts of curing agent, 3.5 parts of plasticizer and 3.5 parts of vulcanization accelerator by weight respectively through weighing equipment, wherein the antioxidant is tri (cetyl alcohol) ester, the curing agent is diaminocyclohexane, the vulcanization accelerator is DM, NS and hydrogen peroxide, the mass addition ratio of the components is 3:2:3 in sequence, the natural composite rubber is a composition of smoked sheet rubber and latex, the biodegradable material is PHA biodegradable master batch, the photocatalyst is zirconium dioxide, and the natural plant fiber is hydrogenated rosin fiber;

s2, rubber refining: pouring the natural composite rubber and the nitrile rubber weighed in the step S1 into rubber mixing equipment, and plasticating for 27min at the temperature of 130 ℃;

s3, mixing treatment: respectively adding the sodium stearate, the biodegradable material, the natural plant fiber and the white carbon black measured in the step S1 into the mixing equipment in the step S2, mixing for 1.3h, uniformly mixing, cooling and cutting into mixed rubber particles;

s4, mixing: and (3) adding the photocatalyst, the epoxy vegetable oil, the surfactant, the antioxidant, the curing agent, the plasticizer and the vulcanization accelerator which are weighed in the step (S1) into a reaction kettle according to the weight part ratio, adding the colloidal particles obtained after the mixing in the step (S3) into the reaction kettle, and stirring at the rotating speed of 600r/min until the colloidal liquid is uniform, thereby obtaining the sealant finished product.

Example 5

A production process of degradable sealant specifically comprises the following steps:

s1, batching: firstly, respectively weighing 18 parts of natural composite rubber, 8 parts of nitrile rubber, 4.5 parts of sodium stearate, 8 parts of biodegradable material, 4.5 parts of photocatalyst, 8 parts of natural plant fiber, 8 parts of epoxy vegetable oil, 4.5 parts of white carbon black, 4.5 parts of surfactant, 4.5 parts of antioxidant, 4.5 parts of curing agent, 4.5 parts of plasticizer and 4.5 parts of vulcanization accelerator by weight through weighing equipment, wherein the antioxidant is trioctyl, the curing agent is diaminocyclohexane, the vulcanization accelerator is DM, NS and hydrogen peroxide, and the mass addition ratio of the components is 3:2:3 in sequence, the natural composite rubber is a composition of granular rubber and crepe rubber, the biodegradable material is a PHA biodegradable master batch, the photocatalyst is cadmium sulfide, and the natural plant fiber is lignin fiber;

s2, rubber refining: pouring the natural composite rubber and the nitrile rubber weighed in the step S1 into rubber mixing equipment, and plasticating for 35min at the temperature of 180 ℃;

s3, mixing treatment: respectively adding the sodium stearate, the biodegradable material, the natural plant fiber and the white carbon black measured in the step S1 into the mixing equipment in the step S2, mixing for 1.8h, uniformly mixing, cooling and cutting into mixed rubber particles;

s4, mixing: and (3) adding the photocatalyst, the epoxy vegetable oil, the surfactant, the antioxidant, the curing agent, the plasticizer and the vulcanization accelerator which are weighed in the step (S1) into a reaction kettle according to the weight part ratio, adding the colloidal particles obtained after the mixing in the step (S3) into the reaction kettle, and stirring at the rotation speed of 700r/min until the colloidal liquid is uniform, thereby obtaining the sealant finished product.

In conclusion, the invention can realize that the sealant is easier to degrade by adopting the natural rubber material to replace the synthetic rubber, well achieves the aim of quickly degrading the waste rubber sealant by adopting the addition of the photocatalyst and the degradation material, realizes energy conservation and environmental protection, enhances the degradation effect, and greatly facilitates the recovery and treatment of the waste rubber sealant.

And those not described in detail in this specification are well within the skill of those in the art.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.