Patent ID: 8408276

Claim:
An organo-modified silicone obtained by an addition reaction of (I) a chain silicone represented by the following general formula (1): wherein in the formula (1), R 1 s each independently represent a hydrocarbon group having 1 to 3 carbon atoms, and a and b are numbers satisfying conditions represented by the following formulae (i) to (iii): 0 ≦a≦ 195 (i) 5 ≦b (ii) 10 ≦a+b≦ 200 (iii), with (II) at least one hydrocarbon selected from the group consisting of monoolefins having 4 to 18 carbon atoms and aromatic hydrocarbons having an alkenyl group and 8 to 12 carbon atoms, and (III) a di(meth)acrylic acid ester represented by the following general formula (2): wherein in the formula (2), R 2 represents any one selected from the group consisting of linear chain alkylene groups having 2 to 16 carbon atoms, branched chain alkylene groups having 2 to 16 carbon atoms, and oxyalkylene groups whose number of repetitions of an oxyalkylene having 2 to 4 carbon atoms is 1 to 6, and R 3 s each independently represent a hydrogen atom or a methyl group, at a molar ratio satisfying a condition represented by the following formula (iv): {a number of moles of the (I) chain silicone}:{a number of moles of the (II) hydrocarbon}:{a number of moles of the (III) di(meth)acrylic acid ester}= A:B:C (iv) wherein in the formula (iv), A represents a number of moles of the (I) chain silicone determined from a number average molecular weight of the (I) chain silicone, and B and C are numbers satisfying conditions represented by the following formulae (v) and (vi): 0.05 A≦C≦A (v) A×b− 2 C=B (vi) wherein in the formula (vi), b has the same meaning as that of b in the formula (1) in the presence of a hydrosilylation catalyst.