Patent ID: 8357762
Filing Date: 2013-01-22
Classification: C08G,C08K

Abstract:
1. An organopolysiloxane mixture comprising cyclic organopolysiloxanes, liner organopolysiloxanes and urea hydrochloride, obtained by hydrolysis and polycondensation of an organosilicon material comprising a first organosilicon compound and/or a partial hydrolytic condensate thereof and optionally, a second organosilicon compound and/or a partial hydrolytic condensate thereof, in the presence of urea hydrochloride said first organosilicon compound having the general formula (1): wherein X is a C 1 -C 18 monovalent hydrocarbon radical which may have at least one functional radical selected from the group consisting of mercapto, epoxy, (meth)acryloxy, alkenyl, amino, and halogen, and R 1 is a C 1 -C 4 monovalent hydrocarbon radical, said second organosilicon compound having the general formula (2): wherein Y is a C 1 -C 18 monovalent hydrocarbon radical which may have at least one functional radical selected from the group consisting of mercapto, epoxy, (meth)acryloxy, alkenyl, amino, and halogen, R 2 is a C 1 -C 3 monovalent hydrocarbon radical different from Y, R 1 is a C 1 -C 4 monovalent hydrocarbon radical, r is 0, 1 or 2, s is 0 or 1, and r+s is 0, 1, 2 or 3, with the proviso that Y is different from X in formula (1) when r is 1 and s is 0, wherein the organopolysiloxane mixture has a polydispersity index (Mw/Mn) of no more than 1.2, given as a weight average molecular weight (Mw) divided by a number average molecular weight (Mn) as measured by gel permeation chromatography versus polystyrene standards, and the organopolysiloxane mixture, when analyzed by silicon nuclear magnetic resonance spectroscopy, exhibits a peak component (T