Halogen-free flame retardant thermoplastic polymer compositions

Details Halogen-free flame retardant thermoplastic polymer compositions Halogen-free flame retardant thermoplastic polymer compositions

C - Chemistry, Metallurgy

08

K

C08K 5/51 (2006.01) C08K 5/521 (2006.01) C08K 5/523 (2006.01) C08K 5/527 (2006.01) C08K 5/5333 (2006.01) C08K 5/5357 (2006.01) C08L 55/02 (2006.01)

Patent

CA 2343793

Halogen-free flame retardant polymer compositions are made from an ABS resin as the sole resin, and a P, P'-dihydrocarbyl pentaerythrityl diphosphonate in which the total number of carbon atoms in the two hydrocarbyl substituents is 8 or less as the sole phosphorus-containing flame retardant, or form at least one thermoplastic polymer and a combination of at least one of the foregoing P, P'-dihydrocarbyl pentaerythrityl disphosphonates, and at least one arylbis (dihydrocarbylphosphate) and/or at least one arylbis (dihydrocarbylphosphinate). Effective flame retardancy (UL-94 V-0) is achieved without material disruption of physical property requirements of the substrate polymer.

On produit des compositions polymères ignifugeantes exemptes d'halogène à partir de résine ABS en tant que résine d'assise, et de diphosphonate P,P'-dihydrocarbyl pentaérythrityle en tant qu'agent ignifugeant d'assise contenant du phosphore, le nombre total d'atomes de carbone des deux substituants hydrocarbyle étant égal ou inférieur à 8. Il est également possible de produire ces compositions à l'aide d'au moins un polymère thermoplastique et d'une combinaison d'au moins l'un des diphosphonates P,P'-dihydrocarbyl pentaérythrityle susmentionnés et/ou d'au moins un aryl bis(phosphate dihydrocarbyle) et/ou au moins un aryl bis(phosphinate dihydrocarbyle). On obtient, de la sorte, un produit au pouvoir ignifugeant efficace (UL-94 V-0) sans porter atteinte aux exigences en matière de propriétés physiques du polymère substrat.

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