Compositions based on silane hydrolyzates and vinyl polymers containing hydrolyzable silyl groups

Claim 1

A moisture-curable composition comprising: (A) an ungelled partial hydrolysis product of an organosilicon-containing material, said organosilicon-containing material comprising greater than or equal to 10 mole percent of at least one organosilane compound corresponding to the formula R--Si--Y 3 in which R represents hydrogen, or a C 1 -C 10 group joined to Si through an Si--C linkage, and each Y independently represents an easily hydrolyzable group, wherein said partial hydrolysis product is prepared by hydrolyzing said easily hydrolyzable groups of said organosilane compound with water wherein the amount of water is determined according to the following formula (E.sub.1,2 ×0.5)+(E.sub.3,4 ×Z)=W, wherein W represents the total moles H 2 O employed calculated on total equivalents of said easily hydrolyzable groups given that one equivalent of said easily hydrolyzable groups corresponds to 1 mole of said easily hydrolyzable groups employed, E 1 ,2 represents the total number of equivalents of Y employed from organosilane compounds containing one or two Y groups, E 3 ,4 represents the total number of equivalents of Y employed from organosilane compounds containing three or four Y groups, and Z is a number in the range of from 0.023 to 0.43; provided that said organosilicon-containing material has an average functionality of equal to or greater than 2.4 based on easily hydrolyzable Y groups attached to silicon atoms of organosilane compounds containing easily hydrolyzable Y groups present in said organosilicon-containing material but excluding easily hydrolyzable Y groups attached to silicon atoms of organosilane compounds having only 1 easily hydrolyzable Y group which may be present in said organosilicon-containing material; and (B) an acrylic addition interpolymer containing at least one silicon atom directly bonded to a hydrolyzable group.