阅读说明：本技术 填料型有机硅轮胎脱模剂及其制备方法 (Filler type organosilicon tire release agent and preparation method thereof ) 是由 赵磊 刘彬 赵洁 齐文玲 张鹏硕 曹鹤 刘秋艳 王莹 王健 赵景辉 倪志远 江 于 2020-08-04 设计创作，主要内容包括：本发明公开了一种填料型有机硅轮胎脱模剂,由以下质量百分含量原料组成：有机硅环体20-30％、阴离子催化剂3-7％、去离子水50-70％、阻燃剂2-4％、润滑剂2-5％和抛光剂2-5％,该脱模剂采用乳液聚合工艺制备得到；本发明还公开了另一种填料型有机硅轮胎脱模剂,由以下质量百分含量原料组成：硅油20-50％、乳化剂2-5％、去离子水40-70％、阻燃剂2-4％、润滑剂0.3-2％和抛光剂2-5％,该脱模剂采用机械乳化工艺制备得到；阻燃剂、润滑剂和抛光剂为粒径0.1-50um的细微粉。本发明的脱模剂可以使轮胎脱模剥离力降低,减少“窝气”现象的发生,同时起到润滑、阻燃与抛光的效果。(The invention discloses a filler type organic silicon tire release agent which is prepared from the following raw materials in percentage by mass: 20-30% of organosilicon ring bodies, 3-7% of anionic catalysts, 50-70% of deionized water, 2-4% of flame retardants, 2-5% of lubricants and 2-5% of polishing agents, wherein the release agent is prepared by adopting an emulsion polymerization process; the invention also discloses another filler type organic silicon tire release agent which is prepared from the following raw materials in percentage by mass: 20-50% of silicone oil, 2-5% of emulsifier, 40-70% of deionized water, 2-4% of flame retardant, 0.3-2% of lubricant and 2-5% of polishing agent, wherein the release agent is prepared by adopting a mechanical emulsification process; the flame retardant, lubricant and polishing agent are fine powder with particle size of 0.1-50 um. The release agent disclosed by the invention can reduce the tire stripping force, reduce the phenomenon of 'air pocket', and simultaneously play roles in lubricating, flame retarding and polishing.)

1. The filler type organic silicon tire release agent is characterized by comprising the following raw materials in percentage by mass: 20-30% of organosilicon ring bodies, 3-7% of anionic catalysts, 50-70% of deionized water, 2-4% of flame retardants, 2-5% of lubricants and 2-5% of polishing agents; wherein the flame retardant, the lubricant and the polishing agent are fine powder with the particle size of 0.1-50 um.

2. The filled silicone tire release agent according to claim 1, wherein the flame retardant, lubricant and polishing agent are fine powders having a particle size of 1 to 20 um.

3. The filled silicone tire mold release agent of claim 1, wherein the silicone ring body is selected from one or more of a methyl ring body, a vinyl ring body, and a phenyl ring body.

4. The filler type silicone tire release agent according to claim 1, wherein the flame retardant is one or more of aluminum hydroxide, aluminum oxide, chromium oxide, magnesium oxide, calcium oxide, silicon oxide, special lanthanum oxide, beryllium oxide, zirconium oxide, carbide, nitride, boride, silicide, and sulfide.

5. The filled silicone tire release agent of claim 1, wherein the lubricant is one or more of carbon black, quartz powder, graphite, boron nitride, and molybdenum disulfide.

6. The filled silicone tire release agent of claim 1, wherein the polishing agent is ferric oxide or ferroferric oxide.

7. The filled silicone tire release agent of claim 1, wherein the anionic catalyst is dodecylbenzene sulfonic acid or dodecylsulfur sulfonic acid.

8. The process for producing a filler-type silicone tire release agent according to any one of claims 1 to 7, characterized by being carried out by the steps of:

A. adding organosilicon ring bodies, an anionic catalyst and deionized water into a reaction kettle according to the mass percentage, and heating for catalytic polymerization;

B. and adding alkali for neutralization after polymerization is finished, sequentially adding a flame retardant, a lubricant and a polishing agent after neutralization is finished, and uniformly stirring to obtain the filler type organic silicon tire release agent.

9. The filler type organic silicon tire release agent is characterized by comprising the following raw materials in percentage by mass: 20-50% of silicone oil, 2-5% of emulsifier, 40-70% of deionized water, 2-4% of flame retardant, 0.3-2% of lubricant and 2-5% of polishing agent; wherein the flame retardant, the lubricant and the polishing agent are fine micro powder with the particle size of 0.1-50 um.

10. The filled silicone tire release agent according to claim 9, wherein the flame retardant, lubricant and polishing agent are fine powders having a particle size of 1 to 20 um.

11. The filled silicone tire release agent according to claim 9, wherein the silicone oil is a hydroxyl-terminated linear polysiloxane, a methyl-terminated linear polysiloxane, a vinyl-terminated linear polysiloxane, an epoxy-terminated linear polysiloxane, a phenyl-terminated linear polysiloxane, an alkoxy-terminated linear polysiloxane, or a long-chain alkyl-terminated linear polysiloxane.

12. The filler-type silicone tire release agent as claimed in claim 9, wherein the flame retardant is one or more of aluminum hydroxide, aluminum oxide, chromium oxide, magnesium oxide, calcium oxide, silicon oxide, special lanthanum oxide, beryllium oxide, zirconium oxide, carbide, nitride, boride, silicide, and sulfide.

13. The filled silicone tire release agent of claim 9, wherein the lubricant is one or more of carbon black, quartz powder, graphite, boron nitride, and molybdenum disulfide.

14. The filled silicone tire release agent of claim 9, wherein the polishing agent is ferric oxide or ferroferric oxide.

15. The process for producing a filler-type silicone tire release agent according to any one of claims 9 to 14, characterized by being carried out by the steps of: adding silicone oil, an emulsifier, a flame retardant, a lubricant and a polishing agent into a reaction kettle according to the mass percentage, uniformly stirring, slowly adding deionized water at normal temperature for an emulsification reaction, and obtaining the filler type organic silicon tire release agent after the emulsification is finished.

Technical Field

The invention relates to the technical field of tire demolding, in particular to a filler type organic silicon tire demolding agent and a preparation method thereof.

Background

The production process of the tire needs to be heated and vulcanized by a vulcanizing machine, the metal mold is used for forming patterns on the outer surface of the tire, the telescopic bladder is used for forming the inner surface of the tire, and the inflated bladder can generate pressure on a green tire between the metal molds. The release agent is indispensable on the contact surface of the green tire and the bladder, and if the release agent is not present in the bladder, the rubber and the bladder of the inner liner of the green tire stick together during vulcanization. At present, the traditional release agent is an emulsion type organic silicon release agent, the formula of the traditional release agent does not contain filler, the release agent is easy to cause the phenomenon of 'air collapse' of a tire, and especially, the effect of a repeated or semi-permanent capsule release agent in the production process of a high-performance tire with a narrow sidewall is worse, and the air exhaust of a tire shoulder part is difficult.

In addition, when automobile tires, especially high-grade cars and racing cars run, the vehicles need to keep high speed, friction between the tires and the ground is increased, the tires are heated rapidly, and tire burst is easy to occur, so that the surfaces of the tires need to have high heat dissipation and flame retardant performance.

Disclosure of Invention

Aiming at the technical problems, the invention provides a filler type organic silicon tire release agent and a preparation method thereof, which overcome the phenomenon of 'air pocket' caused by the traditional release agent and simultaneously provide certain flame retardance, lubricity and polishing property for rubber tires.

In order to achieve the above purpose, the invention is realized by the following technical scheme:

the filler type organic silicon tire release agent is composed of the following raw materials in percentage by mass: 20-30% of organosilicon ring bodies, 3-7% of anionic catalysts, 50-70% of deionized water, 2-4% of flame retardants, 2-5% of lubricants and 2-5% of polishing agents; wherein the flame retardant, the lubricant and the polishing agent are fine powder with the particle size of 0.1-50 um.

Compared with the prior art, the release agent adopting the technical scheme has the beneficial effects that:

1) the filler type organic silicon tire release agent is obtained by adding the fine powdery flame retardant, the lubricant and the polishing agent into the traditional emulsion type organic silicon release agent, is used for demolding the surface of a rubber tire, can reduce the demolding stripping force of the tire, does not influence the subsequent coating function, increases the rough microstructure on the surface of the capsule, forms better exhaust holes between the tire and the capsule when the rubber tire is vulcanized, and reduces the phenomenon of 'air pocket'.

2) The added fine powder can be uniformly distributed in gaps of the tire rubber fibers to form a compact protective layer, and the effects of lubrication, flame retardance and polishing are achieved.

Further, the flame retardant, the lubricant and the polishing agent are fine powders having a particle diameter of 1 to 20 um.

Further, the organosilicon ring body is selected from one or more of methyl ring body, vinyl ring body and phenyl ring body.

Further, the flame retardant is one or more of aluminum hydroxide, aluminum oxide, chromium oxide, magnesium oxide, calcium oxide, silicon oxide, special lanthanum oxide, beryllium oxide, zirconium oxide, carbide, nitride, boride, silicide and sulfide.

Further, the lubricant is one or more of carbon black, quartz powder, graphite, boron nitride and molybdenum disulfide.

Further, the polishing agent is ferric oxide or ferroferric oxide.

Furthermore, the anionic catalyst is dodecyl benzene sulfonic acid or dodecyl sulfur sulfonic acid, and the dodecyl benzene sulfonic acid or the dodecyl sulfur sulfonic acid can not only play a role in catalyzing polymerization, but also can be used as an emulsifier to reduce the surface tension of the emulsion after polymerization.

The preparation method of the filler type organic silicon tire release agent comprises the following steps:

A. adding organosilicon ring bodies, an anionic catalyst and deionized water into a reaction kettle according to the mass percentage, and heating for catalytic polymerization;

B. and adding alkali for neutralization after polymerization is finished, sequentially adding a flame retardant, a lubricant and a polishing agent after neutralization is finished, and uniformly stirring to obtain the filler type organic silicon tire release agent.

The invention provides another filler type organic silicon tire release agent which is prepared from the following raw materials in percentage by mass: 20-50% of silicone oil, 2-5% of emulsifier, 40-70% of deionized water, 2-4% of flame retardant, 0.3-2% of lubricant and 2-5% of polishing agent; wherein the flame retardant, the lubricant and the polishing agent are fine micro powder with the particle size of 0.1-50 um.

Compared with the prior art, the release agent adopting the technical scheme has the beneficial effects that:

1) the filler type organic silicon tire release agent is obtained by adding the fine powdery flame retardant, the lubricant and the polishing agent into the traditional emulsion type organic silicon release agent, is used for demolding the surface of a rubber tire, can reduce the demolding stripping force of the tire, does not influence the subsequent coating function, increases the rough microstructure on the surface of the capsule, forms better exhaust holes between the tire and the capsule when the rubber tire is vulcanized, and reduces the phenomenon of 'air pocket'.

2) The added fine powder can be uniformly distributed in gaps of the tire rubber fibers to form a compact protective layer, and the effects of lubrication, flame retardance and polishing are achieved.

Further, the flame retardant, the lubricant and the polishing agent are fine micro powder with the particle size of 1-20 um.

Further, the silicone oil is a hydroxyl-terminated linear polysiloxane, a methyl-terminated linear polysiloxane, a vinyl-terminated linear polysiloxane, an epoxy-terminated linear polysiloxane, a phenyl-terminated linear polysiloxane, an alkoxy-terminated linear polysiloxane, or a long-chain alkyl-terminated linear polysiloxane.

Further, the flame retardant is one or more of aluminum hydroxide, aluminum oxide, chromium oxide, magnesium oxide, calcium oxide, silicon oxide, special lanthanum oxide, beryllium oxide, zirconium oxide, carbide, nitride, boride, silicide and sulfide.

Further, the lubricant is one or more of carbon black, quartz powder, graphite, boron nitride and molybdenum disulfide.

Further, the polishing agent is ferric oxide or ferroferric oxide.

The preparation method of the filler type organic silicon tire release agent comprises the following steps: adding silicone oil, an emulsifier, a flame retardant, a lubricant and a polishing agent into a reaction kettle according to the mass percentage, uniformly stirring, slowly adding deionized water at normal temperature for an emulsification reaction, and obtaining the filler type organic silicon tire release agent after the emulsification is finished.

Detailed Description

In order that those skilled in the art will better understand the present invention, the following detailed description will be given for clear and complete description of the technical solution of the present invention.