STABILIZATION OF SILOXANE-TERMINATED POLYMER

Title:

STABILIZATION OF SILOXANE-TERMINATED POLYMER

Document Type and Number:

Japanese Patent JP3827258

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To stabilize the Mooney viscosity of a siloxane-terminated polymer during desolventation by treating the polymer with a specified viscosity stabilizer in the presence of an inert solvent before it is brought into contact with water.
SOLUTION: Before a siloxane-terminated polymer having at least one hydrolyzable substituent at a siloxane terminal group is brought into contact with water, it is treated with a stabilizing amount of a viscosity stabilizer selected among acids, acyl halides, methanesulfonic acid, toluenesulfonic acid, sulfuryl chloride, thionyl chloride, phosgene, carbon dioxide, sulfur dioxide, SOCl and SO2Cl2 in the presence of an inert solvent to stabilize its Mooney viscosity. The solvent which can be desirably used is an aliphatic hydrocarbon, especially hexane.

Inventors:

William El Hagen Rosa
David M. Rotgman
Daniel F. Graves
Mark El Steyer Giunia

Application Number:

JP10403397A

Publication Date:

September 27, 2006

Filing Date:

April 08, 1997

Export Citation:

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