Curing-type coating composition and application thereof

A coating composition, a curing-type technology, applied in coatings, polyurea/polyurethane coatings, etc., can solve the problems of increasing the emission of volatile substances in the release agent, affecting the appearance integrity of products, affecting production efficiency, etc. Achieve the effect of strong production continuity, excellent mold release performance and improved production efficiency

Active Publication Date: 2016-02-03
宁波摩华科技有限公司
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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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  • Curing-type coating composition and application thereof
  • Curing-type coating composition and application thereof
  • Curing-type coating composition and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example 1

[0022] 20g of hydrogen-containing silicone oil containing 1.5% hydrogen, 0.1g of Castel catalyst and 20g of toluene were added to the reaction flask, and then 20g of pentafluoropropyl allyl ether (CH 2 =CHCH 2 OCH 2 CF 2 CF 3 ), 2g allyl alcohol (CH 2 =CHCH 2 OH) 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 reactive fluorine-containing polysiloxane compound 1.

Synthetic example 2

[0024] Add 20g of hydrogen-containing silicone oil with a hydrogen content of 1.5%, 0.1g of Castel catalyst and 20g of toluene into the reaction flask, then slowly add 20g of hexafluoroisopropyl allyl ether (CH 2 =CHCH 2 OCH(CF 3 ) 2 ), 2g hydroxyethyl acrylate (CH 2 =CHCOOCH 2 CH 2 OH) 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 reactive fluorine-containing polysiloxane compound 2.

Synthetic example 3

[0026] Add 20g of hydrogen-containing silicone oil with a hydrogen content of 1.5%, 0.1g of Castel catalyst and 20g of toluene into the reaction flask, then slowly add 20g of octafluoropentyl allyl ether (CH 2 =CHCH 2 OCH 2 (CF 2 ) 4 H), 2g allyltriethoxysilane (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. for 6 h, and then the solvent and unreacted monomers were removed in a vacuum to obtain reactive fluorine-containing polysiloxane compound 3.

[0027] 2) Compounding of the composition

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PUM

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Abstract

The invention discloses a curing-type coating composition and application thereof. The curing-type coating composition comprises a reactive fluorine-containing polysiloxane compound and a curing agent, wherein the reactive fluorine-containing polysiloxane compound is represented by a formula of R1[Si(CH3)2O]a[Si(CH3)(R)O]b[Si(CH3)(RF)O]cSi(CH3)2R2; in the formula, R is a monovalent organic group containing hydroxyl or alkoxyl silicon, RF is a monovalent organic group containing polyfluoroalkyl, R1 and R2 are CH3, R or RF respectively, and a, b and c are all positive integers from 1 to 300; the curing agent is a compound containing an isocyanate group or blocked isocyanate; the content of the curing agent relative to 100 parts by mass of the reactive fluorine-containing polysiloxane compound is 5-35 parts by mass; a curing film of the curing-type coating composition can be used as an easy-to-demould coating. The curing-type coating composition provided by the invention has the advantages that a mesh structure is formed on the substrate surface of a mould, the adhesive force is strong, the demoulding force is small, demoulding can be repeated, and the demoulding property is excellent.

Description

technical field [0001] The invention relates to a curable coating composition, in particular to a curable coating composition comprising a reactive fluorine-containing polysiloxane compound and a curing agent, which is mainly used as an easy-release coating and belongs to the release coating layers of technology. 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 fluorin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/08C09D7/12C09D175/04B29C33/64
Inventor 向德轩汤艳舒友
Owner 宁波摩华科技有限公司
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