Chemtura Corporation

Chemtura USA Corporation

William A Wortman

Qinggao Ma

Paul Stott

John M Wefer

David J Sikora

Abuzar Syed

Jin-Yun Wang

Huiling Ding

Leigh Cameron Allen

Jay Wang

Roy Russell

Paul E Stott

Disclosed herein are p-urea phenyl derivatives of the formula: wherein Rand Rare independently selected hydrocarbyl groups. These derivatives are useful as haze reducing agents in propylene polymers and copolymers.

&#x3b2;-crystalline polypropylenes

Disclosed herein are urea phenyl derivatives of the formula: wherein each R is an independently selected hydrocarbyl group and n is 2 or 3, and their use as nucleating agents for propylene polymers.

Urea phenyl derivatives and their use as polypropylene nucleating agents

Disclosed herein are aromatic amide derivatives of the formulae: wherein

&#x3b2;-Crystalline polypropylenes

Disclosed herein is a method for inhibiting the premature polymerization of ethylenically unsaturated monomers comprising adding to said monomers an effective amount of at least one nitroso inhibitor of the structure: wherein R, R, R, and Rare independently selected from the group consisting of hydrogen, nitro, nitroso, halogen, COOR wherein R is hydrogen or alkyl, alkyl, and heteroatom-substituted alkyl; or adjacent groups R, R, R, and Rcan be taken together to form a substituted or unsubstituted fused six-membered ring. Also disclosed is a composition of matter comprising:

Ortho-nitrosophenols as polymerization inhibitors

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Harwinton, CT, United States of America

William A Wortman