Cyclic aminoalkylsilanes and their use as adhesion promoters in room temperature vulcanizable polydiorganosiloxane compositions

Abstract

Cyclic aminoalkylsilane compositions are prepared by the reaction of approximately equimolar amounts of an aminoalkyltrialkoxysilane such as 3-aminopropyltrimethoxysilane and a glycidyl ether such as methyl glycidyl ether. They are useful as adhesion promoters in room temperature vulcanizable compositions comprising polyalkoxysilyl-terminated polydiorganosiloxanes.

What is claimed is: 
     
       1. A composition comprising cyclic aminoalkylsilanes having the formula ##STR8## wherein R 1  is C 1-8  alkyl, each R 2  is independently hydrogen or C 1-4  primary or secondary alkyl, R 3  is methyl or ethyl and n is 2 or 3. 
     
     
       2. A composition according to claim 1 wherein R 1  is methyl and R 2  is hydrogen. 
     
     
       3. A composition according to claim 2 wherein R 3  is methyl. 
     
     
       4. A composition according to claim 3 wherein n is 3.