HEAVY RELEASE ADDITIVE FOR RELEASE SHEET, ORGANOPOLYSILOXANE COMPOSITION FOR RELEASE SHEET, AND RELEASE SHEET
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United States of America Patent
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Oct 9, 2015
filing date -
Oct 17, 2014
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Abstract
Provided are: a heavy release additive for a release sheet, for imparting an excellent release coating whereby heavy release force is obtained curability is not reduced, low-temperature curing is possible, and there is also minimal reduction in residual adhesion rate of a released adhesive sheet; an addition-reaction-type organopolysiloxane composition; and a release sheet. A heavy release additive for a release sheet, containing an acrylic-silicone-based graft copolymer having a weight-average molecular weight of 30,000-2,000,000 obtained by radical polymerization of an organopolysiloxane compound (A) having a radical-polymerizable group, and a radical-polymerizable monomer (B) having an acrylic group and/or a methacrylic group, the heavy release additive for a release sheet wherein the component (A) includes an organopolysiloxane compound (A1) having one radical-polymerizable group in each molecule thereof, and the component (B) includes a radical-polymerizable monomer (B2) having two or more radical-polymerizable groups in each molecule thereof.
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