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Stabilization of polymers with styrenated-p-cresols.

US. patent: 8,193,260

Issued: June 5, 2012

Inventors." Michael E., Gelbin, Jonathan S. Hill and Maurice Power

Assigned: Chemtura

Key statement: Disclosed herein is a process for the preparation of a mixture of styrenated p-cresol species that is liquid at room temperature and has a viscosity of less than 40000 cps at 25[degrees]C, wherein said process affords 2,6-distyrenated p-cresol assaying at 70% minimum by GC area percent, comprising reacting styrene with p+cresol at a molar ratio of 1.85 to 2.1:1, respectively, in the presence of an acid catalyst at elevated temperature, wherein said mixture comprises monostyrenated-p-cresol, distyrenated-p-cresol, and tristyrenated-p-cresol and exhibits an acid number of less than 0.1 mg KOH/gram.
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Title Annotation:Patent News
Publication:Rubber World
Date:Jun 1, 2012
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