Patent ID: 7169872

Claim:
A process of making a hybrid silane composition comprising the steps of hydrolyzing a sulfur silane and a nonsulfur silane in the presence of a hydrated alkali metal salt to effect partial hydrolysis of silane alkoxy groups on each of the sulfur silane and nonsulfur silane, and bonding the partially hydrolyzed sulfur silane and nonsulfur silane to each other via Si—O—Si linkages, said hybrid silane composition comprising a mixture of compounds corresponding to the general formula: F 1 r F 2 s Formula (I) wherein r is 0 to 10,000; s is 0 to 10,000; with the proviso that r and s each have a value of at least 1 for at least one compound of Formula (I) in the mixture of compounds; F 1 is a sulfur silane structure selected from the group consisting of: {(R 1 O) 3-m-n [(—O—) 0.5 ] m R 2 n Si-G 1 -S x —(C=E) y -E z } p -G 2 Formula (II) and {(R 1 O) 3-m-n [(—O—) 0.5 ] m R 2 n Si-G 1 -S x —} 2 (C=E) y Formula (III) wherein each occurrence of R 1 and R 2 is independently hydrogen, or any group which can be obtained by removal of one hydrogen atom from a hydrocarbon group having from 1 to 20 carbon atoms, including branched or straight chain alkyl, alkenyl, aryl or aralkyl groups; each occurrence of G 1 is any group which can be obtained by removal of a quantity of two hydrogen atoms from any hydrocarbon having from 1 to 20 carbon atoms; each occurrence of G 2 is independently a hydrogen atom or any group which can be obtained by removal of a quantity of p hydrogen atoms from any hydrocarbon having from 1 to 20 carbon atoms; S is sulfur; O is oxygen; Si is silicon; each occurrence of E is independently oxygen or S x ; each occurrence of m and n is independently 0, 1 or 2; each occurrence of p is independently 1 to 4; each occurrence of y is 1 and z is independently 0 or 1; and each occurrence of x is independently 1 to 8; F 2 is a nonsulfur silane structure represented by the general formula: (R 1 O) 4-m′-n′ [(—O—) 0.5 ] m′ R 3 n′ Si Formula (IV) wherein each occurrence of R 1 is as defined above; each occurrence of R 3 is independently hydrogen, or a hydrocarbon group of 1 to 20 carbon atoms including aryl as well as branched or straight chain alkyl, alkenyl, arenyl, or aralkyl groups; and each occurrence of m′ and n′ can be independently 0,1, 2 or 3.