Rohm and Haas Company

Warren-teed Laboratories, Inc.

Evan H Crook

Michael C Seidel

Richard Henry Weese

Susan M Liwak

A polymer blend comprises from about 60 parts to about 99.9 parts by weight of a pigmented thermoplastic resin, which resin is a polyester or a polycarbonate or mixtures thereof, and from about 0.1 part to about 40 parts of a sequentially produced multi-stage polymer. The multi-stage polymer comprises a polymer core of at least about 10 parts, based on the weight of the multi-stage polymer. The core is polymerized from a styrenic monomer, or a mixture of styrenic monomers. The styrenic monomer of the core comprises at least about 50% by weight of said core. A second monomer may be present and a crosslinking monomer for styrene is present in said core. The second stage of the multi-stage polymer comprises a polymeric soft stage and the outer stage of the multi-stage polymer is a rigid thermoplastic.

Pigmented thermoplastic resins

Macroreticular resins have shown biological activity for gallstone removal and lowering serum cholesterol by selective adsorption of cholesterol from the bile.

Growing community of inventors

Cherry Hill, NJ, United States of America

Evan H Crook