Patent ID: 6284860
Filing Date: 2001-09-04
Classification: C08G,C08K,C08L,C09K

Abstract:
Process for the preparation of an organopolysiloxane with organyloxy end groups, in which(A) an organopolysiloxane with HO end groups is reacted with(B) an alkoxysilane which has at least two alkoxy groups and a radical which contains at least one secondary or tertiary amino group, which is bonded to the silicon atom via a divalent C.sub.1-12 -hydrocarbon radical, in the presence of(C) an acidic phosphoric ester of the general formula (IV)(HO).sub.a OP(--O--R.sup.7).sub.(3-a) (IV)in whichR.sup.7 has the general formula V[(CR.sup.8.sub.2).sub.b --O].sub.c [(CR.sup.9.sub.2).sub.d ].sub.o --L--M (V)in whichR.sup.8 and R.sup.9 denote a hydrogen, methyl or hydroxyl radical,b and d denote the values 2 or 3,c denotes integral values from 1 to 15,a denotes the values 1 or 2,L denotes a radical from the group consisting of --O--, --COO--, --OOC--, --CONR.sup.2 --, --NR.sup.2 CO-- and --CO-- wherein R.sup.2 denotes a monovalent C.sub.1 -C.sub.10 -hydrocarbon radical which is optionally substituted by flourine, chlorine, bromine, C.sub.1 -C.sub.4 -alkoxyalkyl or cyano group,M denotes a monovalent C.sub.1 -- to C.sub.20 -hydrocarbon radical which is optionally substituted by hydroxyl, fluorine, chlorine, bromine, C.sub.1 -C.sub.10 -alkoxyalkyl or cyano groups, with the proviso that only one of the radicals R.sup.8 and R.sup.9 on a given carbon atom can be a hydroxyl radical o denotes 0 or 1.