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Heat-curing release coating agent, release film, and polyethylene terephthalate release film

A thermal curing, coating agent technology, applied in coatings, polyether coatings, polyester coatings, etc., can solve the problems of film curling and large damage to polyester film.

Active Publication Date: 2021-05-07
ARAKAWA CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of using melamine resin, a high temperature of 150°C or higher is required to form a coating film, so the polyester film as the base material is greatly damaged.
In addition, when melamine resin forms a coating film or stores the film for a long time, there is a problem of film curling due to curing shrinkage

Method used

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  • Heat-curing release coating agent, release film, and polyethylene terephthalate release film
  • Heat-curing release coating agent, release film, and polyethylene terephthalate release film
  • Heat-curing release coating agent, release film, and polyethylene terephthalate release film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] 50 parts of Cymel 303LF (full ether type methylated melamine resin: manufactured by Ornex Japan Co., Ltd.), 50 parts of PRIPOL 2033 (number average molecular weight of hydrogenated dimer glycol 540: manufactured by Croda Japan Co., Ltd.), p-toluenesulfonic acid 4 parts were mixed, and methyl ethyl ketone was further added to prepare a coating agent with a solid content of 20%.

Embodiment 2

[0068] Mix 50 parts of Cymel 303LF, 50 parts of Praxel 205 (polyester polyol number average molecular weight 500, manufactured by Daicel Co., Ltd.), 4 parts of p-toluenesulfonic acid, and further add methyl ethyl ketone to prepare a coating with a solid content of 20%. Cloth agent.

Embodiment 3

[0070] 50 parts of Cymel 303LF, 50 parts of Clare Polyol C-1090 (polycarbonate polyol with a number average molecular weight of 1000, manufactured by Kurare Co., Ltd.) and 4 parts of p-toluenesulfonic acid were mixed, and methyl ethyl ketone was further added to prepare the solid content of 20% coating agent.

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Abstract

The present invention provides a thermally curable release coating agent composition capable of forming a cured film excellent in releasability and residual adhesion at a relatively low temperature and having a small film curl after coating film formation. The heat-curable release coating agent contains a methylated melamine resin (A), a polyol (B) with a molecular weight of 100 to 3000, and an acid catalyst (C).

Description

technical field [0001] The invention mainly relates to a heat-curing release coating agent, a release film coated with the coating composition, and a polyethylene terephthalate release film. Background technique [0002] Biaxially stretched polyester films represented by polyethylene terephthalate films are widely used in various industrial fields because of their excellent properties such as transparency, dimensional stability, mechanical properties, and chemical resistance. In recent years, it has been widely used in various optical films, such as base films of prism sheets, light diffusion sheets, reflectors, touch screens, etc. of LCD components or anti-reflection base films or explosion-proof base films of display screens, PDP filter films, etc. Various uses. In addition, it is also used in large quantities as a release film, as an adhesive sheet, tape, touch screen protective film, and ceramic capacitor, and is also widely used in electronic material applications. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L61/32C08L71/00C08L67/00C08L69/00C09D161/32C09D171/00C09D167/00C09D169/00
CPCC09D161/32C09D167/00C09D169/00C09D171/00C08J5/18C08L61/32C08L67/00C08L69/00C08L71/00C08L2203/16C09D161/28C08J7/04C08L61/28C09D7/20C09D7/63C09D7/65C08L83/00B32B27/36B32B27/42C08J2367/02C08J2461/28B32B2307/748
Inventor 伊藤良树金子光耶子东本徹
Owner ARAKAWA CHEM IND LTD