HEAVY RELEASE ADDITIVE FOR RELEASE SHEET POLYORGANOSILOXANE COMPOSITION FOR RELEASE SHEET AND RELEASE SHEET

摘要

(A) a polydiorganosiloxane having an average degree of polymerization of 500 to 10,000 and having at least one hydroxyl group or hydrolyzable group in one molecule, (B) (SiO _4/2 ) units and (R ₃ SiO _1/2 ) units (In the formula, each R independently represents a monovalent hydrocarbon group of 1 to 12 carbon atoms or an alkenyl group of 2 to 6 carbon atoms, which does not have an aliphatic unsaturated bond.) _4/2 ) Dehydration of polyorganosiloxane resins having a ratio of (R ₃ SiO _1/2 ) units to molar ratio of 0.6 to 1.2, and the total content of hydroxyl groups and hydrolyzable groups is not less than 2.1% by mass and less than 10.0% by mass. The present invention relates to a heavy peeling additive for a release sheet containing a condensation reactant subjected to condensation reaction. The heavy release additive for a release sheet according to the present invention is added to a polyorganosiloxane composition for a release sheet so as to have a significantly higher peeling force than in the case of no addition. This effect is obtained.