| abstract |
An organopolysiloxane containing aliphatic unsaturated hydrocarbon groups contains a unit of formula (I), a unit of formula (II) and optionally units of formulae (III) - (V): A-Si(A)(B)-A (I) O1/2SiR2R<3> (II) O1/2SiR3 (III) SiR2O (IV) O1/2SiR2-Y-SiR2O1/2 (V) A = -(OSiR<1>R<2>)z-(OSiR2)x-Y-SiR2O1/2; B = A, R, R<1>; when x is 0, B is R or R<1>; R = 1-12C saturated alkyl or aromatic; R'' = 1-12C saturated alkyl or aromatic containing O, S, N, Si or Ti; R<1> = -OSiR2-Y-SiR2O1/2; R<2> = R, R<1> or R'; R<3> = H2C=CR<5>(-R<4>)v-; R<4> = 1-10C divalent hydrocarbon or a chemical bond; R<5> = H, or R; Y = -CH2CHR<5>(-R<4>)v-; and v, x, z = 0, Also claimed is a cross-linkable composition. |