Inventors:
Harshad R. Dodia - Kennett Square PA
George J. Ostapchenko - Wilmington DE
Assignee:
E. I. Du Pont de Nemours and Company - Wilmington DE
International Classification:
B32B 524
B32B 532
B32B 2718
B32B 2736
Abstract:
A flame resistant copolyetherester elastomer film composition comprising (a) 60-85 weight percent of a hydrophilic copolyetherester elastomer film having a thickness of 0. 3-1. 6 mils, a water vapor transmission rate of at least 7,000 gm. mil/m. sup. 2 /24 hours and an elongation of at least 600% with said hydrophilic elastomer film consisting essentially of a multiplicity of long chain ester units and short chain ester units joined head-to-tail through ester linkages wherein copolyetherester elastomer contains about 25-80 weight percent short chain ester units, and (b) 15-40 weight percent of a flame retardant component comprised of 37. 5 to 100 weight percent of at least one brominated aromatic compound selected from the group consisting of tetradecabromodiphenoxybenzene, ethylenebistetrabromophthalimide, and decabromodiphenoxybenzene, wherein the ratio of the thickness of the hydrophilic copolyetherester film to the weight percent, as based upon the weight of components (a) and (b), of the brominated aromatic compound is less tha 0. 04. The flame retardant compound may be further comprised of no more than 62. 5 weight percent of at least one compound selected from the group consisting of metal oxides, tricresylphosphate, aluminum trihydrate, and zinc borate.
