Patent ID: 6284861
Filing Date: 2001-09-04
Classification: C08G,C08K,C08L

Abstract:
A silicone rubber composition comprising(A) 100 weight parts of a polydiorganosiloxane mixture comprising (i) 1 to 99 wt % polydiorganosiloxane having at least two silicon atom-bonded vinyl groups per molecule and (ii) the remaining percentage of polydiorganosiloxane having at least two non-vinyl silicon atom-bonded alkenyl groups per molecule;(B) a polyorganosiloxane having at least two silicon atom-bonded hydrogen atoms per molecule in an amount such that the ratio of the number of moles of hydrogen atoms bonded to silicon atoms in this component to the number of moles of alkenyl groups bonded to silicon atoms in component (A) is between 0.5:1 and 20:1;(C) 0.1 to 10 weight parts of a silatrane derivative described by general formula: ##STR11##where each R.sup.1 group is independently selected from the group consisting of a hydrogen atom and alkyl groups; each R.sup.2 group is independently selected from the group consisting of a hydrogen atom, alkyl groups, and alkenyloxyalkyl groups described by general formula--R.sup.4 --O--R.sup.5where R.sup.4 is an alkylene group, and R.sup.5 is an alkenyl group; at least one R.sup.2 group is an alkenyloxyalkyl group; and R.sup.3 is a group selected from the group consisting of substituted and unsubstituted monovalent hydrocarbon groups, C.sub.1 to C.sub.10 alkoxy groups, glycidoxyalkyl groups, oxiranylalkyl groups, acyloxyalkyl groups, and aminoalkyl groups; and(D) a platinum type catalyst in an amount sufficient to cure the composition.