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Solventless releaser composition for use with silicone pressure-sensitive adhesives and release liner

A release agent and composition technology, which is applied in the field of solvent-free release agent composition, can solve the problems of pinholes, shrinkage, and peeling on the coating surface, and achieve the effect of improving the release performance

Inactive Publication Date: 2012-02-08
SHIN ETSU CHEM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, pinholes and shrinkage phenomena occur on the coating surface, causing local severe peeling

Method used

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  • Solventless releaser composition for use with silicone pressure-sensitive adhesives and release liner
  • Solventless releaser composition for use with silicone pressure-sensitive adhesives and release liner
  • Solventless releaser composition for use with silicone pressure-sensitive adhesives and release liner

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] By adding 95.3 parts of organopolysiloxane (alkenyl content 0.0034mol / 100g, fluorine content 44.0wt%, viscosity 1080mPa·s) containing alkenyl and fluorinated substituent groups having formula (I), formula ( Ⅲ) organohydrogenpolysiloxane (fluorine content 37.3wt%) (providing Si-H group / Si-CH=CH 2Composition #1 was prepared by uniformly mixing 4.7 parts of the group molar ratio of 2.5) and 0.65 parts of the reaction regulator having the formula (IV). To the mixture was added an amount of chloroplatinic acid-vinylsiloxane complex salt to provide 50 ppm of platinum. The resulting composition #1 had a viscosity of 980 mPa·s.

[0078]

Embodiment 2

[0080] By adding 86.4 parts of organopolysiloxane (alkenyl content 0.0109mol / 100g, fluorine content 38.8wt%, viscosity 288mPa·s) containing alkenyl and fluorinated substituents having formula (II) and formula (III) Organohydrogenpolysiloxanes (providing Si-H groups / Si-CH=CH 2 Composition #2 was prepared by uniformly mixing 13.6 parts with a group molar ratio of 2.5) and 0.65 parts of a reaction modifier having the formula (IV). To the mixture was added an amount of chloroplatinic acid-vinylsiloxane complex salt to provide 50 ppm of platinum. The resulting composition #2 had a viscosity of 300 mPa·s.

[0081]

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Abstract

A solventless releaser composition is provided comprising (A) an organopolysiloxane containing at least two alkenyl groups and at least one monovalent fluorinated substituent group and having a fluorine content of 30-50 wt % and a viscosity of 100-2,000 mPa-s at 25 DEG C., (B) an organohydrogenpolysiloxane containing at least three SiH groups, (C) a reaction regulator, and (D) a platinum catalyst. The composition is coated and cured to a substrate to form a release liner for use with silicone pressure-sensitive adhesives.

Description

technical field [0001] The present invention relates to a solvent-free release agent composition capable of forming a cured silicone coating with low surface energy and suitable for use with silicone pressure sensitive Adhesive joints. Background technique [0002] In order to reduce or prevent sticking or sticking between substrates such as paper or plastic films and pressure sensitive adhesives (referred to as PSAs), in the prior art, a cured coating of a silicone composition is formed on the surface of the substrate to It is common practice to impart peeling properties to it. It is generally called "release liner". [0003] Silicone-based PSAs have a wide range of applications compared to other PSAs because they are based on organopolysiloxanes with excellent properties including heat resistance, cold resistance, chemical resistance, electrical insulation, and low toxicity. Silicone-based PSA has high adhesive strength, so in order to easily peel the PSA tape or label ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/07C09D183/08C09D183/05C09J183/04C09J7/02B32B27/06B32B27/28
CPCC08G77/24C09J183/08C08L2205/02C09J183/04C09J7/0228C09D183/04C09J2483/005C09D183/08C08G77/12C09J2427/005C08G77/20C08L83/04C08L83/08C09J7/401C08L83/14C08K5/5419C08J7/0427C08J5/18C09J7/30C08J2483/08C08J2483/14
Inventor 山口浩一木下博文
Owner SHIN ETSU CHEM IND CO LTD
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