Organopolysiloxane composition for use in release paper or release film

An organopolysiloxane composition for release paper or release film, comprising at least the following components (A) to (D):

• (A) 100 parts by weight of an organopolysiloxane having at least two silicon-bonded alkenyl groups per molecule and a structure of the following formula (1):
• MaMvibDcDvidTeTvifQg (1)
• wherein M is R3SiO1/2, Mvi is R2PSiO1/2, D is R2SiO2/2, Dvi is RPSiO2/2, T is RSiO3/2, Tvi is PSiO3/2, Q is SiO4/2, R is each independently a C1-C12 substituted or unsubstituted monovalent hydrocarbon group free of aliphatic unsaturation, P is an alkenyl group of the formula:
• —(CH2)n—CH═CH2 wherein n is an integer of 0 to 6, a is 0, b, d and f are each independently 0 or a positive number, not all b, d and f are 0 at the same time, 2≤b+d+f≤500, c is a positive number of 10 to 27,000, e is 0 or a positive number of up to 200, and g is 0 or a positive number of up to 1,000,
• (B) an organohydrogenpolysiloxane having on the average at least two silicon-bonded hydrogen atoms (or Si—H groups) per molecule in an amount to give 1 to 5 moles of Si—H groups per mole of alkenyl groups in component (A),
• (C) an organic peroxide in an amount of 0.01 to 5 parts by weight per 100 parts by weight of component (A), and
• (D) a platinum group metal base catalyst in an amount to give 1 to 500 ppm of platinum group metal based on the total weight of components (A), (B), (C) and (D).