Patent ID: 8354462
Filing Date: 2013-01-15
Classification: C08K,H01B

Abstract:
1. A method of making a storage stable and processable particulate solid heat stabilizer composition for a vinyl halide polymer comprising identifying hydrotalcite particles represented by a sigmoidal curve on a cartesian coordinate plot of zeta potential (mV) versus pH, said curve having negative zeta potential values balanced against positive zeta potential values over a pH range, said curve having an inflection point between a pH of about 3 and about 6 representing the isoelectric point (IEP) between said negative and positive zeta potential values, mixing about 30% by weight to about 90% by weight of said hydrotalcite particles with a particulate solid heat stabilizer based on the total solids of the stabilizer composition to provide an essentially free flowing, storage stable, and processable stabilizer composition upon mixing components of the composition and blending with a vinyl halide polymer in effective amounts to confer heat stabilizing effectiveness upon said polymer.