Patent ID: 8461283

Claim:
A single component organopolysiloxane composition, comprising a silicone base B capable of curing via polycondensation reaction into a silicone elastomer comprising at least one linear polyorganosiloxane oil C capable of crosslinking via polycondensation into an elastomer functionalized at its ends by hydrolysable radicals obtained by condensation of a precursor bearing hydroxyl functional groups with a crosslinking silane bearing hydrolysable radicals, the linear polyorganosiloxane oil C having functionalized ends of alkoxy, oxime, acyl and/or enoxy type, and a catalytically effective amount of at least one polycondensation catalyst which is a metal complex or salt A of formula (1), (2) or (3) 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: copper, silver, boron, scandium, cerium, ytterbium, bismuth, molybdenum, germanium and manganese; the symbol L 1 represents a ligand which is a β-dicarbonylato anion or the enolate anion of a β-dicarbonyl-containing compound, or an acetylacetato anion derived from a β-keto ester and when r1≧2, the symbols L 1 are identical or different, with the supplementary condition that when the symbol M represents boron, copper or bismuth then the symbol L 1 is not acetylacetonate; 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; [Fe(L 3 ) r3 (L 4 ) r4 (Y′) x′ ] (2) in which: r3≧1; r4≧0 and x′≧0; the symbol L 3 represents a ligand which is a β-ketoesterato anion or the enolate anion of a β-keto ester compound and when r3≧2, the symbols L 3 are identical or different; the symbol L 4 represents an anionic ligand which is different from L 3 and when r4≧2, the symbols L 4 are identical or different; and the symbol Y′ represents a neutral ligand and when x′≧2, the symbols Y′ are identical or different; and [Fe(L 5 ) r5 (L 4 ) r4 (Y′) x′ ] (3) in which: r5≧1; r4≧0 and x′≧0; the symbol L 5 represents a ligand which is a β-diketonato anion selected from the group constituted by: 3,5-heptanedionato, 2,6-dimethyl-3,5-heptanedionato and 2,2,6,6-tetramethyl-3,5-heptanedionato and when r5≧2, the symbols L 5 are identical or different; the symbol L 4 represents an anionic ligand which is different from L 5 and when r4≧2, the symbols L 4 are identical or different; and the symbol Y′ represents a neutral ligand and when x′≧2, the symbols Y′ are identical or different.