| 摘要 |
Novel crosslinkable compositions are described, comprising (A) organopolysiloxanes containing aliphatically unsaturated hydrocarbon radicals, comprising; (a) at least one unit, per molecule, of the formula <IMAGE> (I) in which A is a radical of the formula-(OSiR1R2)z-(OSiR2)x-Y-SiR2O+E,fra 1/2+EE ,R is identical or different and is a monovalent, aliphatically saturated or aromatic hydrocarbon radical having 1 to 12 carbon atoms per radical, R1 is a radical of the formula -OSiR2-Y-SiR2O+E,fra 1/2+EE , R2 has the meaning of R, R1 or R', where R' is a monovalent, aliphatically saturated or aromatic hydrocarbon radical having 1 to 12 carbon atoms per radical, which contains one or more heteroatoms chosen from the group consisting of O, S, N, Si and Ti, Y is a divalent hydrocarbon radical of the formula -CH2CHR5(-R4)v-, in which R4 is a divalent hydrocarbon radical having 1 to 10 carbon atoms per radical or a chemical bond, if v has the value 0, R5 is a hydrogen atom or has the meaning of R, v is 0 or 1, x and z is identical or different and is 0 or 1, and B has the meaning of A or R or R', with the proviso that B is R or R' if x is 0, (b) at least one unit, per molecule, of the formula O+E,fra 1/2+EE SiR2R3 (II), in which R has the meaning given above for this radical and R3 is an aliphatically unsaturated hydrocarbon radical of the formula H2C=CR5(-R4)v-, in which R4 and R5 have the meaning given above for these radicals.
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