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A kind of epoxy curable fluorine-containing composition

A composition and curing technology, applied in the field of epoxy-curable fluorine-containing compositions, can solve the problems of high environmental pressure, hindering the number of demolding, easy accumulation and fouling, etc., and achieve strong film adhesion and prevent loss. , the effect of good mutual compatibility

Active Publication Date: 2019-03-29
玉溪玉象包装材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the conventional sacrificial release agent, it can overcome the defect that the release agent must be reapplied when manufacturing each batch of molded products, and a series of adverse consequences caused by it, such as easy accumulation of scale, affecting the integrity of the appearance of the product ;Requires frequent cleaning, which affects the production efficiency; each coating, the cost is high, and at the same time, the emission of volatile substances such as solvents in the release agent is increased, and the pressure on environmental protection is high, etc.
However, the existence of pure fluorosilicone compounds has poor adhesion to the mold, which hinders the further improvement of its demoulding times.

Method used

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  • A kind of epoxy curable fluorine-containing composition
  • A kind of epoxy curable fluorine-containing composition

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0027] Add 20g of hydrogen-containing silicone oil with a hydrogen content of 1.3%, 0.1g of Castel catalyst and 20g of toluene into the reaction flask, then slowly add 5g of glycidyl methacrylate dropwise 17g pentafluoropropyl allyl ether (CH 2 =CHCH 2 OCH 2 CF 2 CF 3 ) and 20 g of toluene, after the dropwise addition was completed, the temperature was slowly raised to 85° C. for 6 h, and then the solvent and unreacted monomers were removed in a vacuum to obtain polysiloxane 1.

Synthetic example 2

[0029] Add 20g of hydrogen-containing silicone oil with a hydrogen content of 1.3%, 0.1g of Castel catalyst and 20g of toluene into the reaction flask, then slowly add 5g of allyl glycidyl ester dropwise 17g hexafluoroisopropyl allyl ether (CH 2 =CHCH 2 OCH(CF 3 ) 2 ) and 20 g of toluene, after the dropwise addition was completed, the temperature was slowly raised to 85° C. to react for 6 h, and then the solvent and unreacted monomers were removed in a vacuum to obtain polysiloxane 2.

Synthetic example 3

[0031] Add 20g of hydrogen-containing silicone oil with a hydrogen content of 1.3%, 0.1g of Castel catalyst and 20g of toluene into the reaction flask, then slowly add 4g of allyl glycidyl ester dropwise 17g octafluoropentyl allyl ether (CH 2 =CHCH 2 OCH 2 (CF 2 ) 4 H), 2g allyltrimethoxysilane (CH 2 =CHCH 2 Si(OCH 3 ) 3 ) and 20 g of toluene, after the dropwise addition was completed, the temperature was slowly raised to 85° C. to react for 6 h, and then the solvent and unreacted monomers were removed in a vacuum to obtain polysiloxane 3.

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Abstract

The invention discloses an epoxy curing type fluorine-containing composition. The epoxy curing type fluorine-containing composition comprises polysiloxane shown in the formula R1-[Si(CH3)2O]a[Si(CH3)(R<O>)O]b[Si(CH3)(R<F>)O]c[Si(CH3)(R)O]dSi(CH3)2-R2, an amino siloxane compound and a solvent. R<O> is monovalent organic groups containing epoxy groups, R<F> is monovalent organic groups containing perfluoroalkyl, R is monovalent organic groups containing alkoxy silicon, R1 and R2 are CH3 or R<O> or R<F> or R correspondingly, a, b and C are all positive integers, and d is a positive integer or zero. The composition can serve as a surface treatment agent for a rubber and plastic product mold and has a demolding effect. The epoxy curing type fluorine-containing composition is good in intersolubility and can be evenly cured into a film on the surface of the base of the mold, the adhesive force of a film layer is high, the demolding force is small, demolding can be repeated, and the demolding performance is excellent.

Description

technical field [0001] The invention relates to an epoxy curable fluorine-containing composition, which can be used as a surface treatment agent for molds of rubber and plastic products, and belongs to the technical field of mold release treatment. Background technique [0002] The molding process of polymer materials such as epoxy resin products often adopts the molding method, injecting the melt or solution material into the mold, after curing and molding, and then taking out the molded product from the mold. A release agent is a functional substance interposed between the mold and the finished product that prevents the shaped molding from sticking to the mold surface. In order to ensure that the product can be demolded smoothly, it is usually necessary to pre-coat a release agent on the surface of the mold so that the product does not bond to the mold after cooling. [0003] Silicone compounds and fluorine-containing compounds are often used as release agents, and the co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C33/62
CPCB29C33/62
Inventor 向德轩汤艳
Owner 玉溪玉象包装材料有限公司