Silane scavengers for hydroxy radicals containing silicon-hydrogen bonds

DETAILED DESCRIPTION I claim: 1.
A stable, one package, substantially anhydrous and substantially acid free, room temperature vulcanizable organopolysiloxane composition stable under ambient conditions in the substantial absence of moisture over an extended period of time and convertible to a tack-free elastomer, comprising: (A) a polydiorganosiloxane base polymer wherein the silicon atom at each chain end is terminated with at least two alkoxy radicals; (B) an effective amount of condensation catalyst; and (C) a stabilizing amount of scavenger for hydroxy functional groups selected from the group consisting of trimethoxysilane, triethoxysilane, methyldimethoxysilane, ethyldiethoxysilane, methyldiethoxysilane, ethyldimethoxysilane, dimethoxy(ethylmethylketoximo)silane, methylmethoxy(ethylmethylketoximo)silane, dimethoxy(N-methylcarbamato)silane, ethylmethoxy(N-methylcarbamato)silane, methylisopropenoxysilane, methylmethoxyisopropenoxysilane, dimethoxyisopropenoxysilane, methyldi-isopropenoxysilane, ethylmethoxy(N-ethylpropionamido)silane, methyldi(N-methylbenzamido)silane, dimethoxy(N-methylacetamido)silane, methyldimethoxyacetimidatosilane, methylmethoxy(N,N.
sup.
1,N.
sup.
1 -trimethylureido)silane, dimethoxyisocyanatosilane, ethylethoxyisocyanatosilane, methoxydiisocyanatosilane, dimethoxythioisocyanatosilane, tetramethyldisilane, tetramethyldisiloxane, dimethyldimethoxydisilane, dimethyldimethoxydisiloxane, tetramethyldimethoxytrisiloxane, tetraethyldimethoxytrisiloxane, 3-siloxytrisilthiane, silylthiodisiloxane, and silylthiodimethyldisiloxane.
2.
A stable, one package, substantially anhydrous and substantially acid-free room temperature vulcanizable organopolysiloxane composition stable under ambient conditions in the substantial absence of moisture over an extended period of time and convertible to a tack-free elastomer, comprising: (A) a silanol terminated polydiorganosiloxane base polymer; (B) an effective amount of a crosslinking silane of the formula ##STR7## where R.
sup.
7 is a C