阅读说明：本技术 一种耐高温橡胶脱模剂及其制备方法 (High-temperature-resistant rubber mold release agent and preparation method thereof ) 是由 李永庆 陈悦 于 2020-06-12 设计创作，主要内容包括：本发明的耐高温橡胶脱模剂,包括A组分、B组分及C组分,其中A组分、B组分、C组分的质量比为10：2-4：1-3；A组分原料按重量份包括：甲基含氢硅油100份,聚氧乙烯二醇2-5份,聚氧亚烷基甘油醚1-2份,聚二甲基硅氧烷2-5份,聚(甲基-3,3,5-三氟丙基硅氧烷)0.1-0.5份,聚氧亚烷基二醇0.1-0.5份；B组分原料包括：聚二甲基-甲基三氟丙基硅油、二甲苯磺酸钠、酞酸正丁酯、异构醇聚氧乙烯醚；C组分原料包括：聚四氟乙烯、聚丙烯酰胺、脂肪醇、聚乙二醇醚、甲苯。本发明的耐高温橡胶脱模剂具有良好脱模性能的同时,耐高温性能好,不易因高温变质导致功能失效,且使用过程中没有刺激性气味产生,不会造成车间环境污染。本发明还公开了上述耐高温橡胶脱模剂的制备方法。(The high-temperature-resistant rubber mold release agent comprises a component A, a component B and a component C, wherein the mass ratio of the component A to the component B to the component C is 10: 2-4: 1-3; the component A comprises the following raw materials in parts by weight: 100 parts of methyl hydrogen-containing silicone oil, 2-5 parts of polyoxyethylene glycol, 1-2 parts of polyoxyalkylene glycerol ether, 2-5 parts of polydimethylsiloxane, 0.1-0.5 part of poly (methyl-3, 3, 5-trifluoropropylsiloxane) and 0.1-0.5 part of polyoxyalkylene glycol; the component B comprises the following raw materials: dimethyl-methyl trifluoro propyl silicone oil, sodium xylene sulfonate, n-butyl phthalate and isomeric alcohol polyoxyethylene ether; the component C comprises the following raw materials: polytetrafluoroethylene, polyacrylamide, fatty alcohol, polyglycol ether and toluene. The high-temperature-resistant rubber mold release agent has good mold release performance, good high-temperature resistance, difficult function failure caused by high-temperature deterioration, no pungent smell generated in the use process and no workshop environment pollution. The invention also discloses a preparation method of the high-temperature-resistant rubber release agent.)

1. The high-temperature-resistant rubber mold release agent is characterized by comprising a component A, a component B and a component C, wherein the mass ratio of the component A to the component B to the component C is 10: 2-4: 1-3;

the component A comprises the following raw materials in parts by weight: 100 parts of methyl hydrogen-containing silicone oil, 2-5 parts of polyoxyethylene glycol, 1-2 parts of polyoxyalkylene glycerol ether, 2-5 parts of polydimethylsiloxane, 0.1-0.5 part of poly (methyl-3, 3, 5-trifluoropropylsiloxane) and 0.1-0.5 part of polyoxyalkylene glycol;

the component B comprises the following raw materials: dimethyl-methyl trifluoro propyl silicone oil, sodium xylene sulfonate, n-butyl phthalate and isomeric alcohol polyoxyethylene ether;

the component C comprises the following raw materials: polytetrafluoroethylene, polyacrylamide, fatty alcohol, polyglycol ether and toluene.

2. The high-temperature-resistant rubber mold release agent as claimed in claim 1, wherein the mass ratio of polyoxyethylene glycol to polyoxyalkylene glycol in the raw materials of component A is 3-4: 0.2-0.4.

3. The high-temperature-resistant rubber mold release agent as claimed in claim 1, wherein in the raw material of the component A, the mass ratio of polydimethylsiloxane to poly (methyl-3, 3, 5-trifluoropropylsiloxane) is 3-4: 0.2-0.4.

4. The high-temperature-resistant rubber mold release agent as claimed in claim 1, wherein the component B comprises the following raw materials in percentage by mass: 5-10% of sodium xylene sulfonate, 2-4% of n-butyl phthalate, 1-3% of isomeric alcohol polyoxyethylene ether and the balance of dimethyl-methyl trifluoro propyl silicone oil.

5. The high-temperature-resistant rubber mold release agent as claimed in claim 1, wherein in the raw materials of the component B, the mass ratio of sodium xylene sulfonate, n-butyl phthalate and isomeric alcohol polyoxyethylene ether is 6-8: 2.5-3.5: 1.5-2.5.

6. The high-temperature-resistant rubber mold release agent as claimed in claim 1, wherein in the raw materials of the component C, the mass ratio of polytetrafluoroethylene, polyacrylamide, fatty alcohol, polyethylene glycol ether and toluene is 10-20: 1-2: 1-2: 1-2: 15-35.

7. The high-temperature-resistant rubber mold release agent as claimed in claim 1, wherein in the raw material of the component C, the mass ratio of polyacrylamide, fatty alcohol and polyglycol ether is 1.3-1.7: 1.2-1.8: 1.3-1.7.

8. The high-temperature-resistant rubber mold release agent as claimed in claim 1, wherein in the raw material of the component C, the mass ratio of polytetrafluoroethylene to polyethylene glycol ether is 13-17: 1.3-1.7.

9. The process for producing a high-temperature-resistant rubber mold release agent according to any one of claims 1 to 8, characterized by comprising the steps of:

s1, feeding methyl hydrogen-containing silicone oil, polyoxyethylene glycol, polyoxyalkylene glyceryl ether, polydimethylsiloxane, poly (methyl-3, 3, 5-trifluoropropylsiloxane) and polyoxyalkylene glycol into a stirring kettle a, stirring for 20-40min at 80-90 ℃ and the stirring speed of 400r/min to obtain a component A;

s2, feeding the dimethyl-methyl trifluoro propyl silicone oil, the sodium xylene sulfonate, the n-butyl phthalate and the isomeric alcohol polyoxyethylene ether into a stirring kettle B, and stirring for 5-15min at the temperature of 50-60 ℃ and the stirring speed of 1200r/min to obtain a component B;

s3, feeding polytetrafluoroethylene, polyacrylamide, fatty alcohol, polyethylene glycol ether and toluene into a stirring kettle C, and stirring at the temperature of 30-40 ℃ for 20-30min at the stirring speed of 1500-2000r/min to obtain a component C;

and S4, adding the component A, the component B and the component C into a stirring kettle d, and adding water to fully stir to obtain the high-temperature-resistant rubber release agent.

10. The process for producing a high-temperature-resistant rubber mold release agent according to claim 9, wherein in S4, the sum of the mass of the component a, the component B, and the component C is α, the mass of water is β, and the ratio of α to β is 100: 30-50.

Technical Field

The invention relates to a rubber release agent, in particular to a high-temperature-resistant rubber release agent and a preparation method thereof.

Background

The release agent has the function of smoothly separating a cured and molded product from a mold, so that a smooth and flat product is obtained, the mold is ensured to be used for multiple times, and the release agent is widely applied to various mold pressing operations such as rubber molding, metal die casting, glass fiber reinforced plastics, injection molding thermoplastic plastics, vacuum foaming sheets, extruded profiles and the like.

Vulcanized rubbers are used in automobile parts, railway parts, construction machines, and the like. Rubber vulcanization molding needs to be carried out in a mold, in order to facilitate demolding after vulcanization is finished, a demolding agent needs to be coated in the mold in advance, the mold is specially used for preventing a product from being taken out of the mold easily when a molded vulcanized rubber product is demolded, and the mold can be separated and cleaned quickly during vulcanization of the rubber product. In addition, the use of the release agent can increase the production efficiency and reduce the maintenance cost of the mold.

The rubber release agent is used as an important auxiliary agent in the production process of rubber products, can improve the appearance and performance of the products and improve the quality of the products, and the common release agents are waxes, silicone oils, soaps and the like. The rubber vulcanization process often needs to be carried out under high temperature conditions, for example, the post-vulcanization temperature of the silicone rubber reaches 230 ℃. Therefore, the mold release agent is required to have strong high temperature resistance and ensure smooth mold release after rubber vulcanization molding. In addition, the use of the release agent cannot cause pollution to the workshop environment.

Disclosure of Invention

The invention aims to provide a high-temperature-resistant rubber release agent and a preparation method thereof. The high-temperature-resistant rubber mold release agent has good mold release performance, good high-temperature resistance, difficult function failure caused by high-temperature deterioration, no pungent smell generated in the use process and no workshop environment pollution. The preparation method of the high-temperature-resistant rubber release agent is simple to operate and is beneficial to industrial production.

The technical scheme of the invention is as follows:

a high-temperature-resistant rubber mold release agent comprises a component A, a component B and a component C, wherein the mass ratio of the component A to the component B to the component C is 10: 2-4: 1-3;

the component A comprises the following raw materials in parts by weight: 100 parts of methyl hydrogen-containing silicone oil, 2-5 parts of polyoxyethylene glycol, 1-2 parts of polyoxyalkylene glycerol ether, 2-5 parts of polydimethylsiloxane, 0.1-0.5 part of poly (methyl-3, 3, 5-trifluoropropylsiloxane) and 0.1-0.5 part of polyoxyalkylene glycol;

the component B comprises the following raw materials: dimethyl-methyl trifluoro propyl silicone oil, sodium xylene sulfonate, n-butyl phthalate and isomeric alcohol polyoxyethylene ether;

the component C comprises the following raw materials: polytetrafluoroethylene, polyacrylamide, fatty alcohol, polyglycol ether and toluene.

Preferably, in the raw materials of the component A, the mass ratio of polyoxyethylene glycol to polyoxyalkylene glycol is 3-4: 0.2-0.4.

Preferably, in the raw materials of the component A, the mass ratio of polydimethylsiloxane to poly (methyl-3, 3, 5-trifluoropropylsiloxane) is 3-4: 0.2-0.4.

Preferably, the component B comprises the following raw materials in percentage by mass: 5-10% of sodium xylene sulfonate, 2-4% of n-butyl phthalate, 1-3% of isomeric alcohol polyoxyethylene ether and the balance of dimethyl-methyl trifluoro propyl silicone oil.

Preferably, in the raw material of the component B, the mass ratio of sodium xylene sulfonate, n-butyl phthalate and isomeric alcohol polyoxyethylene ether is 6-8: 2.5-3.5: 1.5-2.5.

Preferably, in the raw materials of the component C, the mass ratio of polytetrafluoroethylene, polyacrylamide, fatty alcohol, polyglycol ether and toluene is 10-20: 1-2: 1-2: 1-2: 15-35.

Preferably, in the raw materials of the component C, the mass ratio of polyacrylamide to fatty alcohol to polyethylene glycol ether is 1.3-1.7: 1.2-1.8: 1.3-1.7.

Preferably, in the raw materials of the component C, the mass ratio of polytetrafluoroethylene to polyethylene glycol ether is 13-17: 1.3-1.7.

The high-temperature resistant rubber release agent provided by the invention has the following remarkable improvements:

the high-temperature-resistant rubber release agent disclosed by the invention is prepared by compounding methyl hydrogen-containing silicone oil, polyoxyalkylene glycerol ether and polyoxyalkylene glycol, so that a rubber product can have sufficient release property even if a small amount of release agent is added, the release agent is matched with the action of the polyoxyethylene glycol to ensure the release property, the cleaning performance is excellent, and the release agent attached to the surface of vulcanized rubber is easy to clean;

the dimethyl-methyl trifluoropropyl silicone oil and the isomeric alcohol polyoxyethylene ether are compounded, so that the surface tension and the thermal stability are extremely low, the release agent can be applied to a severe high-temperature environment, and the safety is high, and no irritation or harm exists; meanwhile, a uniform film can be formed on the surface of the die by compounding polytetrafluoroethylene and polyacrylamide, the dispersion is excellent by matching with the action of fatty alcohol and polyglycol ether, the surface of the film is smooth and stable, and even a rubber product with a complex shape can still obtain a finished product with accurate size and high qualification rate.

For the preparation method, the technical scheme of the invention is as follows:

the preparation method of the high-temperature resistant rubber release agent comprises the following steps:

s1, feeding methyl hydrogen-containing silicone oil, polyoxyethylene glycol, polyoxyalkylene glyceryl ether, polydimethylsiloxane, poly (methyl-3, 3, 5-trifluoropropylsiloxane) and polyoxyalkylene glycol into a stirring kettle a, stirring for 20-40min at 80-90 ℃ and the stirring speed of 400r/min to obtain a component A;

s2, feeding the dimethyl-methyl trifluoro propyl silicone oil, the sodium xylene sulfonate, the n-butyl phthalate and the isomeric alcohol polyoxyethylene ether into a stirring kettle B, and stirring for 5-15min at the temperature of 50-60 ℃ and the stirring speed of 1200r/min to obtain a component B;

s3, feeding polytetrafluoroethylene, polyacrylamide, fatty alcohol, polyethylene glycol ether and toluene into a stirring kettle C, and stirring at the temperature of 30-40 ℃ for 20-30min at the stirring speed of 1500-2000r/min to obtain a component C;

and S4, adding the component A, the component B and the component C into a stirring kettle d, and adding water to fully stir to obtain the high-temperature-resistant rubber release agent.

Preferably, in S4, the sum of the mass of the component A, the component B and the component C is alpha, the mass of water is beta, and the ratio of alpha to beta is 100: 30-50.

Preferably, in S4, the stirring speed is 100-300r/min, and the stirring temperature is 50-70 ℃.

The preparation method of the high-temperature-resistant rubber release agent is easy to operate and suitable for industrial production.

Detailed Description

The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.