Rohm and Haas Company

William L Wills

Michael Paul Hallden-Abberton

Anibal Rosado

Donna M Wetzel

Susanna E Richards

Albin P Berzinis

High-impact poly(styrene) resins modified with small-particle-size, multi-stage impact modifiers having a crosslinked poly(butadiene) core and a poly(styrene) or other vinylaromatic polymer shell show an improved balance of impact strength, stiffness and surface gloss, and an improved resistance to environmental stress crazing, when compared to conventional high-impact poly(styrene).

Core-shell impact modifiers for styrenic resins

An impact resistant graft polymer and an emulsion polymerization process comprising: 1) an agglomerated rubber latex made from a rubber latex and a polymerized polymeric additive, and 2) a grafted polymer.

Impact resistant polymers

The invention is directed to clear polymer blends of acrylic/vinyl aromatic copolymers with certain core-shell polymer impact modifiers. The core-shell modifiers have lightly crosslinked, predominantly diolefinic rubbery cores and one or more hard shells.

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Roebling, NJ, United States of America

William L Wills