Light release additive for release sheet, organopolysiloxane composition for release sheet, and release sheet

An organopolysiloxane composition for a release sheet, comprising components (a) to (d) below:

• (a) 100 parts by weight of an organopolysiloxane having two or more alkenyl groups per molecule other than component (b);
• (b) from 0.1 to 20 parts by weight of the easy release additive for a release sheet, comprising an acrylic-silicone graft copolymer which has a weight-average molecular weight of from 1,000 to 100,000 and is obtained by radical polymerizing (A) an acrylic group and/or methacrylic group-containing organopolysiloxane compound with (B) a radical polymerizable monomer having one radical polymerizable group per molecule,
• (c) from 0.1 to 30 parts by weight of an organohydrogenpolysiloxane having two or more silicon-bonded hydrogen atoms per molecule;
• and
• (d) a platinum group metal catalyst in a platinum metal weight, based on the overall composition, of from 10 to 1,000 ppm.