Organopolysiloxane composition

An organopolysiloxane composition comprising:

• (A) an organopolysiloxane having at least two silicon-bonded alkenyl groups per molecule,
• (B) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms per molecule,
• (C) a platinum hydrosilylation catalyst, and
• (D) a compound having the formula (1-1) or (1-2):
• R1—Si(R1)a{[X—Si(R1)2]b—R1}c (1-1)
• R1—Si(R1)a{(Zi)}c (1-2)
• wherein R1 is each independently a monovalent organic group selected from an optionally substituted C1-C30 monovalent organic group which may be separated by at least one atom selected from oxygen, nitrogen, sulfur and phosphorus, and an organic group having the formula (2):
• —Y—NC (2)
• wherein Y is an optionally substituted C1-C30 divalent organic group which may be separated by at least one atom selected from oxygen, nitrogen, sulfur and phosphorus, one to three of all groups R1 being an organic group of formula (2),
• X is each independently an oxygen atom, or an optionally substituted C1-C30 divalent organic group which may be separated by at least one atom selected from oxygen, nitrogen, sulfur and phosphorus,
• a is an integer of 0 to 3, c is an integer of 0 to 3, a+c is 3, b is an integer of 1 to 300,
• Zi is a group of the formula:
• —X—Si(R1)j(Zi+1)(3−j)
• wherein i indicative of a hierarchy is an integer of 1 to 10, j is an integer of 0 to 3, j associated with at least one of all hierarchies is 0 or 1, the lowest hierarchy is j=3, or
• a cyclic polysiloxane compound in which a cyclic structure is formed of repeating unit of —OSi(R1)2—, wherein R1 is as defined above.