An alkoxy endblocked polydiorgansiloxane of the formula Z--(SiR.sub.2 O).sub.n SiR.sub.2 --Z where Z is ##STR1## where Y is R.sub.a (R'O).sub.(3-a) Si--, X is ##STR2## in which a is 0 or 1, d has a value of 1 to 3 inclusive, v is 0 or 1, n.ltoreq.8, p has a value of 3 to 6 inclusive, q has a value of 2 to 6 inclusive, r has a value of 4 to 6 inclusive, w is 0 or 1, Me is methyl, R.sup.1 is an alkyl radical having from 1 to 6 inclusive carbon atoms, each R is a monovalent radical independently selected from the group consisting of hydrocarbon radicals and halogenated hydrocarbon radicals, R' is an alkyl radical of 1 to 3 inclusive carbon atoms, R" is a divalent hydrocarbon radical selected from the group consisting of --(CH.sub.2).sub.b -- and --CH(Me)(CH.sub.2).sub.c --, b is from 2 to 6 inclusive, c is from 0 to 4 inclusive, the bond at ** is attached to the silicon atom Si*, can be used as the base polymer for making one package room temperature vulcanizable silicone elastomer compositions by combining it with alkoxysilane, titanium catalyst and filler. These RTV's cure rapidly and exhibit adhesion to substrates upon which they are cure.
一种烷氧基端封闭的聚二甲基
硅氧烷,其
化学式为Z--(SiR.sub.2 O).sub.n SiR.sub.2 --Z,其中Z为##STR1##其中Y为R.sub.a (R'O).sub.(3-a) Si--,X为##STR2##其中a为0或1,d的值为1至3,v为0或1,n≤8,p的值为3至6,q的值为2至6,r的值为4至6,w为0或1,Me为甲基,R.sup.1是具有1至6个碳原子的烷基基团,每个R是独立选择的羟基碳原子和卤代羟基碳原子,R'是1至3个碳原子的烷基基团,R"是从--(CH.sub.2).sub.b--和--CH(Me)(CH.sub.2).sub.c--中选择的二价碳氢基团,其中b为2至6,c为0至4,**处的键连接到
硅原子Si*,可与烷氧基
硅烷,
钛催化剂和填料结合使用作为制备一组室温固化
硅弹性体组成物的基础聚合物。这些室温固化
硅弹性体快速固化,并在固化后与基材具有粘附性。