Patent ID: 8242226

Claim:
An organopolysiloxane composition comprising: a silicone base B capable of curing via polycondensation reaction into a silicone elastomer, said silicone base comprising: at least one polyorganosiloxane oil C capable of crosslinking via polycondensation into an elastomer; optionally at least one crosslinking agent D; optionally at least one adhesion promoter E; and optionally at least one siliceous, organic and/or non-siliceous mineral filler F; and a catalytically effective amount of at least one polycondensation catalyst which is a metal complex or salt A of formula (1) below: [M (L 1 ) r1 (L 2 ) r2 (Y) x ] (1) in which: r1 >1, r2>0 and x>0; the symbol M represents a metal selected from the group consisting of cerium, bismuth and molybdenum; the symbol L 1 represents a ligand which is an alcoholate anion and when r1>2, the symbols L 1 are identical or different, wherein when M represents cerium or molybdenum, L 1 represents a diol; the symbol L 2 represents an anionic ligand which is different from L 1 and when r2>2, the symbols L 2 are identical or different; and the symbol Y represents a neutral ligand and when x>2, the symbols Y are identical or different.