| 摘要 |
Compositions which may be crosslinked to form adhesive-repellent coatings having increased separation values, comprising organopolysiloxanes in which at least 95 mol percent of the siloxane units have the formula HR1 C=CR2COOR3SiR2O1/2, where R is a monovalent hydrocarbon radical or a halogenated monovalent hydrocarbon radical, R1 is hydrogen or a halogenated phenyl radical, R2 is hydrogen or an alkyl radical having from 1 to 4 carbon atoms, R3 is a divalent hydrocarbon radical or a halogenated divalent hydrocarbon radical, in which the organopolysiloxanes also contain siloxane units of the formulas HSR4SiRO and R25SiO in which R is the same as above, R4 is a divalent hydrocarbon radical, R5 is the same as R or a hydrocarbon radical substituted with the HR1C=CR2COO group, where R1 and R2 are the same as above, and at least 95 percent of the silicon-bonded oxygen atoms in the siloxane units having the HS group are present in the 3BOND SiOSi 3BOND group, and at least one organopolysiloxane having units of the formulas R36SiO178 and R6SiO3/2 and/or SiO4/2 in which 0.5 to 50 percent of the R6 radicals are those of the formula HSR4- where R4 is the same as above and the remaining R6 radicals are the same or different monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals or hydrocarbon radicals which are substituted by a group of the formula HR1C=CR2COO-, where R1 and R2 are the same as above.
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