Dow Global Technolgoies LLC

David R Arrowsmith

John Gordon-Duffy

William Jack Kruper, Jr

Zenon Lysenko

Duane R Romer

Bruce Bell

William Gerald Stobby

Chau Van Vo

Inken Beulich

Ralph Schmidt

Simon Lee

Prepare extruded polymer foam comprising at least 50 weight-percent alkenyl aromatic polymer, a brominated flame retardant providing 0.8 to 1.4 weight percent bromide, 0.05 to 0.5 weight-percent hydrobromic acid scavenger, at least 1.5 weight-percent graphite and less than 0.1 weight-percent C&#x2014;C and O&#x2014;O labile organic compounds using a blowing agent composition comprising at least 0.3 weight-parts per 100 weight parts polymer and that consists of blowing agents having an ozone depletion potential of zero and a global warming potential that is less than 1000.

Polymer foam with low bromine content

Extruded polymer foams are prepared using brominated fatty acids, an ester, amide or ester-amide of a brominated fatty acid, a glyceride of one or more brominated fatty acids, or a polymerized brominated fatty acid as an FR additive. The brominated FR additives unexpectedly are stable at the extrusion temperatures, and provide excellent flame retardancy to the foams.

Extruded polymer foams containing brominated fatty acid-based flame retardant additives

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Achern, Germany

David R Arrowsmith