Chemtura Corporation

Wayne Meyer

Larry D Timberlake

James D Siebecker

Jennifer L Bohan

Stephen B Falloon

Mark V Hanson

David W Bartley

Julia E Holland

Steven Bakeis

Stephen B Fallon

A method for flame-retarding styrenic resins is disclosed wherein the method comprises incorporating in compositions an effective amount of at least one flame retardant compound comprising both aliphatic and aromatic bromine.

Flame retardant composition for use in styrenics

The invention is a flame retardant for styrene foams. The flame retardant contains both aromatic bromine and an olefin. The olefin is an internal olefin. Desirable flame retardants are selected from: formula I: wherein Ris C-Cand optionally containing a heteroatom or olefin; Ris C-Cand optionally containing a heteroatom or olefin; and R-Ris H, C-C(optionally containing a heteroatom), or halogen; and further wherein the compound of formula I is present in a concentration of at least 50 percent of a trans isomer;formula II: wherein Ris Halogen, C-Cand optionally containing a heteroatom or olefin; Ris Halogen, C-Cand optionally containing a heteroatom or olefin; and R-Ris H, C-C(optionally containing a heteroatom), or halogen; andformula III: wherein Ris Halogen, C-Cand optionally containing a heteroatom or olefin; Ris Halogen, H, C-Cand optionally containing a heteroatom or olefin; and R-Ris H, halogen.

Flame retardants for use in styrenic foams

A controlled molecular weight polymer of styrene is provided having bromine substituted thereon. Control of molecular weight is achieved by the use of alpha-methyl styrene dimer as a chain transfer agent. The brominated polymer of styrene is useful as a flame retardant, particularly for polyamides giving improved properties including color retention after molding.

Process for controlling the molecular weight of polymers of bromostyrene

Polymer compositions of bromostyrenes having controlled molecular weight

Process for controlling the molecular weight of polymers of bromostyrenes

Polymers of bromostyrenes having controlled molecular weight

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West Lafayette, IN, United States of America

Wayne Meyer