Organopolysiloxane compound and production method thereof, and composition containing said compound

A method for producing an organopolysiloxane compound represented by the following general formula (1)″, comprising:

• a step of subjecting a diorganopolysiloxane of the following general formula (3) with both molecular chain ends being blocked by a silanol group and an organosilane compound of the following general formula (2) to a condensation reaction, and thus blocking both ends of the molecular chain of the diorganopolysiloxane of the following general formula (3) with both molecular chain ends being blocked by a silanol group with a residue of the organosilane compound of the following general formula (2),
• wherein each R1 independently represents an alkyl group having 1 to 10 carbon atoms which may be substituted by an aryl group, a halogen atom or a cyano group, or an aryl group having 6 to 10 carbon atoms which may be substituted by an alkyl group, a halogen atom or a cyano group;
• and n′ is a number of 1 to 10,
• wherein each of R2, R3 and R4 independently represents an alkyl group having 1 to 10 carbon atoms which may be substituted by an aryl group, a halogen atom or a cyano group, or an aryl group having 6 to 10 carbon atoms which may be substituted by an alkyl group, a halogen atom or a cyano group,
• wherein each of R1, R2, R3 and R4 independently represents an alkyl group having 1 to 10 carbon atoms which may be substituted by an aryl group, a halogen atom or a cyano group, or an aryl group having 6 to 10 carbon atoms which may be substituted by an alkyl group, a halogen atom or a cyano group;
• and n′ is a number of 1 to 10.