Resin-based composite material water-based release agent and preparation method thereof

A technology of composite materials and release agents, applied in lubricating compositions, petroleum industry, etc., can solve the problems of high price, construction performance, difficulty in obtaining a smooth coating on the surface of the mold, and high price of organic fluoropolymers, so as to achieve effective storage and Transport, good anti-corrosion, good stability effect

Active Publication Date: 2021-05-25
YANTAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic fluoropolymers are expensive, and it is difficult to obtain a smooth coating on the surface of the mold
High price and construction performance are the bottlenecks that limit its wide application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Epoxy-terminated dimethyl polysiloxane resin (molecular weight: 500,000-1,000,000 g / mol) and diethanolamine are fed in a molar ratio of 1:4, then excess chloroform is added, and the reaction is carried out at room temperature for 12 hours. Then precipitate in deionized water and dry to obtain hydroxydimethylpolysiloxane resin.

[0037] 2) Hydroxydimethylpolysiloxane resin and 4-mercaptobutyric acid are fed in a molar ratio of 1:9, and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and 4-Dimethylaminopyridine was used as a catalyst (the molar ratio of the two was 10:1), and excess chloroform was used as a solvent, and the reaction was carried out at room temperature for 24 hours. Then it was washed with water, washed with 5% aqueous sodium bicarbonate solution, and dried. After removing chloroform with a rotary evaporator, it was dried in a vacuum oven at 30°C for 24 hours to obtain a mercapto-terminated dimethylpolysiloxane.

[0038] 3) Heat 20 parts of...

Embodiment 2

[0047] 1) Epoxy-terminated dimethylpolysiloxane resin (molecular weight 20000-50000 g / mol) and diethanolamine are fed in a molar ratio of 1:2, then excess chloroform is added, and the reaction is carried out at room temperature for 24 hours. Then precipitate in deionized water and dry to obtain hydroxydimethyl polysiloxane resin.

[0048] 2) Hydroxydimethylsiloxane resin and 3-mercaptopropionic acid are fed in a molar ratio of 1:2, and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride and 4 -Dimethylaminopyridine was used as a catalyst (the molar ratio of the two was 10:1), and excess chloroform was used as a solvent, and the reaction was carried out at room temperature for 24 hours. Then wash with water, wash with 5% aqueous sodium bicarbonate solution, and dry. After removing chloroform with a rotary evaporator, dry in a vacuum oven at 30°C for 24 hours to obtain a mercapto-terminated dimethyl polysiloxane resin.

[0049] 3) Heat 30 parts of mercaptopolysiloxane o...

Embodiment 3

[0057] 1) Epoxy-terminated diphenyldimethylsiloxane resin (molecular weight 2000-4000 g / mol) and diethanolamine are fed in a molar ratio of 1:3, then excess chloroform is added, and the reaction is carried out at room temperature for 2 hours . Then precipitate in deionized water and dry to obtain hydroxydiphenyldimethylsiloxane resin.

[0058] 2) Hydroxydiphenyldimethylsiloxane resin and 6-mercaptocaproic acid are fed in a molar ratio of 1:4, and 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloric acid is used to Salt and 4-dimethylaminopyridine were used as catalysts (the molar ratio of the two was 10:1), and excess chloroform was used as solvent, and the reaction was carried out at room temperature for 12 hours. Then wash with water, wash with 5% sodium bicarbonate aqueous solution, and dry. After removing chloroform with a rotary evaporator, dry in a vacuum oven at 30°C for 24 hours to obtain a mercapto-terminated diphenyldimethylsiloxane resin.

[0059] 3) Heat 25...

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Abstract

The invention discloses a resin-based composite material release agent and a preparation method thereof. The release agent consists of the following components in parts by weight: 20-30 parts of sulfydryl polysiloxane, 0.5-5 parts of an organic solvent, 0.1-0.3 parts of an emulsifier, 0.5-2 parts of a pH regulator, 0.1-0.5 parts of a graphene oxide aqueous solution (the weight content of graphene oxide is about 10%) and 70-80 parts of deionized water. The resin-based composite material release agent disclosed by the invention has good film-forming property and wear resistance, not only can protect a mold and prolong the service life of the mold, but also can remarkably improve the demolding frequency. In addition, the release agent is low in cost and simple in preparation process, and has good dilutability, corrosion resistance and freeze-thaw stability.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, in particular to a resin-based composite material release agent and a preparation method thereof. Background technique [0002] In the preparation process of resin-based composite materials, metal molds are often required to assist in the molding of composite products. Limited to the reactive groups of the resin used and the type of supporting curing crosslinking agent, the molding temperature of the composite material is generally 120-200°C. During the molding process, the resin has the opportunity to directly contact the metal mold, and the composite material product is firmly adhered to the surface of the mold, and it is difficult to demould to obtain a qualified product. Therefore, according to the process requirements, it is necessary to periodically wipe the release agent on the surface of the metal mold to form a complete coating, completely isolate the product from...

Claims

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Application Information

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IPC IPC(8): C10M173/02C08G77/392C10N40/36
CPCC10M173/02C08G77/392C10M2229/053C10M2201/041C10M2207/022C10M2203/022C10M2209/104C10M2207/126C10M2207/046C10M2219/042C10M2209/109
Inventor 郑耀臣徐汇乔程辉刘潞王宋琦张文杰
Owner YANTAI UNIV
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