Patent ID: 8524933

Claim:
An organopolysiloxane compound having both a β-ketoester group-containing organic group and a hydrocarbyloxy group within a single molecule, said compound having an average compositional formula (1) as follows: Y a R 1 b R 2 c Si(OR 3 ) d (OH) e O (4-a-b-c-d-e)/2 (1) wherein Y represents an organic group containing a β-ketoester group that may be at least partially enolized, R 1 represents a monovalent hydrocarbon group of 1 to 18 carbon atoms that may optionally contain at least one functional group selected from the group consisting of a mercapto group, epoxy group, acryloyloxy group, methacryloyloxy group, alkenyl groups, amino group, halogen atoms, and groups generated when an enolized β-ketoester group undergoes an intramolecular or intermolecular reaction with a hydrocarbyloxy group represented by a formula: OR 3 , R 2 represents a monovalent hydrocarbon group of 1 to 18 carbon atoms that contains no functional groups and is different from R 1 , R 3 represents a monovalent hydrocarbon group of 1 to 4 carbon atoms, and a, b, c, d and e are numbers that satisfy 0.01≦a≦1, 0≦b<1, 0≦c≦2, 0≦d≦2, and 0≦e≦1 respectively, provided that 2≦a+b+c+d+e≦3.