Beta-ketoester group-containing organopolysiloxane compound

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:

• YaR1bR2cSi(OR3)d(OH)eO(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,
• R1 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:
• OR3,
• R2 represents a monovalent hydrocarbon group of 1 to 18 carbon atoms that contains no functional groups and is different from R1,
• R3 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.