| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject polymer which has high compatibility with various kinds of polar solvents and monomers and is hardly hydrolyzed, by introducing a polyoxyalkylene segment between a polymerizable group at one terminal and a polysiloxane segment. SOLUTION: This polyorganosiloxane of the formula [R1 to R5 are each a 1 to 20C alkyl, a 4 to 10C cycloalkyl or the like; R6 is H, a 1 to 5C alkyl or the like; (n) is >=1; (m) is >=0; (n)+(m) is 4 to 1,100 which is the average polymerization degree of the polysiloxane segment; X is a 2 to 20C alkylene; Y is OCH2CH2 or the like; (p) is >=3; Z is a 1 to 20C alkylene] having a number- average molecular weight of 500 to 100,000. The polymer of the formula is obtained by subjecting a polyorganosiloxane having a SiH group at one end and a polyoxyalkylene having a therminal hydroxyl group and an alkenyl group to a hydrosilylation reaction to obtain a block polymer, and then adding an isocyanate compound to the obtained block polymer.
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