Patent ID: 6255404
Filing Date: 2001-07-03
Classification: C08C,C08K

Abstract:
A method for stabilizing the Mooney viscosity of a siloxane-terminated polymer having at least one hydrolyzable substituent on the siloxane end group by adding, after the polymerization but still in the presence of an inert solvent, a viscosity stabilizing effective amount of a viscosity stabilizing agent selected from the group consisting of alkyl alkoxysilanes of the structural formulaR.sup.1.sub.n Si(OR.sup.2).sub.4-nwherein R.sup.1 is selected from the group consisting of C.sub.1 to C.sub.20 alkyl, C.sub.4 to C.sub.10 cycloalkyl, or C.sub.5 to C.sub.20 aromatic groups, wherein R.sup.2 may be the same as or different from R.sup.1 or other R.sup.2, if any, and is selected from the group consisting of C.sub.1 to C.sub.20 alkyl, C.sub.4 to C.sub.10 cycloalkyl, or C.sub.5 to C.sub.20 aromatic groups, and wherein n is an integer from 1 to 3, prior to contacting the polymer with water.