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Photo-curable organopolysiloxane composition, and cured product thereof

A technology of organosilicon compound and polysiloxane, applied in the direction of coating, etc., can solve the problems of poor deep curing performance, curing, poor compatibility, etc., and achieve the effect of good storage capacity and good transparency

Active Publication Date: 2021-04-09
DOW TORAY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]However, these types of photoinitiators are poorly compatible with organopolysiloxanes, making the resulting photocurable organopolysiloxane compositions transparent Poor properties, so deep curing by long-wavelength light irradiation is poor, resulting in insufficient curing

Method used

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  • Photo-curable organopolysiloxane composition, and cured product thereof
  • Photo-curable organopolysiloxane composition, and cured product thereof
  • Photo-curable organopolysiloxane composition, and cured product thereof

Examples

Experimental program
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Effect test

Embodiment 1 to 6 and comparative Embodiment 1

[0580] Using the composition (parts by mass) shown in Table 1, a photocurable organopolysiloxane composition was prepared from the following components. Note that the photocurable organopolysiloxane compositions of Practice Examples 1 to 4 and Comparative Example 1 were prepared to provide 1 mol of 3-mercaptopropyl group with respect to 1 mol of vinyl group.

[0581] The following components were used as component (A).

[0582] Component (a-1): Linear dimethylpolysiloxane capped at both molecular ends with dimethylvinylsiloxy groups and having a viscosity of 43,000 mPa·s at 23°C

[0583] Component (a-2): Linear dimethyl polysiloxane capped at both molecular ends with dimethylvinylsiloxy groups and having a viscosity of 2,300 mPa·s at 23°C

[0584] Component (a-3): branched dimethylpolysiloxane each molecule of which is terminated by dimethylvinylsiloxy groups at four molecular ends and has a viscosity of 200 mPa·s at 23°C

[0585] Component (a-4): capped with trimethylsiloxy...

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Abstract

A photo-curable organopolysiloxane composition is provided. The photo-curable organopolysiloxane composition comprises: (A) 100 parts by mass of a photo-curable organopolysiloxane; and (B) about 0.01 to about 5.0 parts by mass of an organosilicon compound having at least one photo-active organic group and having at most about 200 silicon atoms per molecule, wherein the organosilicon compound is activated when it is exposed to light of a wavelength of from 300 to 420 nm. The photo-curable organopolysiloxane composition exhibits good storage ability and can be cured by exposing light of a wavelength of from 300 to 420 nm, and can form a cured product exhibiting good transparency.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and all advantages of U.S. Provisional Patent Application No. 62 / 739,469, filed October 1, 2018, the contents of which are incorporated herein by reference. technical field [0003] The present invention relates to photocurable organopolysiloxane compositions and cured products thereof. Background technique [0004] Photocurable organopolysiloxane compositions are used as adhesives and pressure sensitive adhesives to enhance the visibility of optical displays. In recent years, for safety reasons, thermoplastic resins such as polycarbonate have been used as display surface cover materials, and at the same time, there is a need for a light that is not absorbed by the thermoplastic resin (such as visible light with a wavelength of 405nm). Cured photocurable organopolysiloxane compositions. [0005] Generally, photocurable organopolysiloxane compositions contain a photoinitiator to impro...

Claims

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Application Information

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IPC IPC(8): C08G77/14C08G77/20C08G77/28C08G77/08
CPCC09D183/04C08G77/30C08L83/00C08G77/14C08G77/20C08G77/28C08G77/08C08L83/04
Inventor 张恩实小川琢哉大川直
Owner DOW TORAY CO LTD
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