Curable organopolysiloxane release agent composition for thermal paper, thermal paper, and thermal recording label sheet

A curable organopolysiloxane releasing agent composition for a thermally sensitive paper, said composition comprising the following components:

• (A) one or more organopolysiloxanes having an alkenyl group with a number of carbon atoms between 4 and 12, where the inclusion proportion of vinyl (CH2═CH—) within the alkenyl group is between 0.5 and 3.0 mass %;
• (B) an organohydrogen polysiloxane mixture of two or more different organohydrogen polysiloxanes each having at least two silicon-bonded hydrogen atoms (Si—H) in a single molecule, wherein the component (B) comprises:
• (B1) an organohydrogen polysiloxane having a viscosity at 25° C. in a range of from 2.5 to 50 mPa·s;
• and
• (B2) an organohydrogen polysiloxane having a viscosity at 25° C. in a range of from 100 to 500 mPa·s;
• wherein the components (B1) and (B2) are mixed with a mass ratio of from 75:25 to 90:10, and
• wherein the component (B1) has a lower degree of polymerization than the component (B2);
• (C) a hydrosilylation reaction catalyst;
• and
• (D) a hydrosilylation reaction inhibiting agent;
• wherein the silicon atom-bonded hydrogen atoms within the component (B) is in an amount of from 1.0 to 4.0 moles per one mole of carbon-carbon double bonds in in the component (A), and
• wherein the curable organopolysiloxane releasing agent composition is solvent-free.