Patent ID: 7291670

Claim:
An addition crosslinkable organopolysiloxane composition which does not generate hydrogen gas upon curing, comprising: (A) at least one compound containing aliphatic carbon-carbon multiple bonds, (B) at least one organopolysiloxane containing Si-bonded hydrogen atoms, (C) or, instead of (A) and (B), at least one organopolysiloxane which contains SiC-bonded radicals containing aliphatic carbon-carbon multiple bonds and also contains Si-bonded hydrogen atoms, and (D) at least one rhodium catalyst selected from the group consisting of compounds of the formulae L(X)Rh(PR 3 3 ) s (VI), and rhodium (II) octanoate dimer where R 3 are each independently hydrogen, —OR 4 , or a monovalent unsubstituted or substituted C 1-24 hydrocarbon radical, R 4 are each independently a hydrogen atom or monovalent unsubstituted or sudstituted C 1-20 hydrocarbon radical, X where present, is a halogen or hydrogen atom, L are each independently CO, acetylacetonate, 0.5 cyclooctadiene, 0.5 norbornadiene or P(R 3 ) 3 , and s is 0 to 3.