| 摘要 |
<p>A room-temperature curable polyorganosiloxane composition comprising following components (A) to (C): (A) 100 parts by weight of mixture of (1) a terminal reactive polyorganosiloxane represented by the formula R<1>a(R<2>O)3-aSiZ[R2SiO]nSiR<1>2ZSi(OR<2>)3-aR<1>a wherein R and R<1>, which may be the same or different, each represents a monovalent substituted or unsubstituted hydrocarbon group; R<2> represents a hydrogen atom or a monovalent group selected from the group consisting of an alkyl group having from 1 to 4 carbon atoms and an alkoxyalkyl group having from 1 to 6 carbon atoms; a represents a number of from 0 to 2; Z represents an oxygen atom or a divalent hydrocarbon group which may have an oxygen atom, a sulfur atom, or a nitrogen atom between the carbons; and n represents a number that the viscosity of the compound at 25 DEG C becomes from 50 to 1,000,000 cP, and (2) a silane represented by the formula R<3>bSi(OR<4>)4-b wherein R<3> represents a monovalent substituted or unsubstituted hydrocarbon group; R<4> represents a monovalent group selected from the group consisting of an alkyl group having from 1 to 4 carbon atoms and an alkoxyalkyl group having from 1 to 6 carbon atoms; and b represents 0 or 1, or a partially hydrolyzed condensation product thereof, the amount of (A)(1) being from 85 to 100 parts by weight, (B) from 0.01 to 20 parts by weight of a curing catalyst, and (C) from 0.5 to 20 parts by weight of a polycondensation reaction product of an amino group-containing silane represented by the formula XcSi(WNH2)Y3-c and a silazane represented by the formula XdY3-dSiNHSiY3-dXd wherein W represents a substituted or unsubstituted organic group having at least 2 carbon atoms; X represents a hydrolyzable group selected from the group consisting of an alkoxy group, an amido group, a carbamato group, an enoxy group, an isocyanato group, and a ureido group; Y independently represents a monovalent substituted or unsubstituted hydrocarbon group having from 1 to 13 carbon atoms; c represents a number of from 1 to 3; and d represents a number of from 0 to 3.</p> |
