Stabilized flame retardant additives and their use

Details Stabilized flame retardant additives and their use Stabilized flame retardant additives and their use

C - Chemistry, Metallurgy

08

K

C08K 5/02 (2006.01) C08K 3/34 (2006.01) C08K 5/03 (2006.01) C08K 5/06 (2006.01) C08K 5/58 (2006.01)

Patent

CA 2386919

Flame retardant additive compositions having enhanced thermal stability are described. They comprise a blend formed from (A) at least one organic bromine flame retardant selected from (i) a flame retardant compound having a plurality of bromine atoms directly bonded to a cycloaliphatic ring, (ii) the bis(2,3-dibromopropyl ether) of tetrabromobisphenol-A, and (iii) the bis(2,3- dibromopropyl ether) of tetrabromobisphenol-S, (B) and alkyltin mercaptoalkanoate, and (C) a zeolite adjuvant. The proportions are 0.01-0.08 part by weight of (B) per part by weight of (A), and 0.01-0.35 part by weight of (C) per part by weight of (A). Thermoplastic polymer compositions in which these additive compositions are employed possess enhanced properties.

Cette invention concerne des compositions d'additif ignifugeant stabilisées caractérisées par une stabilité thermique accrue. Ces compositions renferment un mélange comprenant (A) au moins un ignifugeant organique à base de brome pris parmi (i) un composé ignifugeant comptant une pluralité d'atomes de brome liés directement à un noyau cycloaliphatique, (ii) le bis(2,3-dibromopropyl éther) de tétrabromobisphénol-A, et (iii) le bis(2,3-dibromopropyl éther) de tétrabromobisphénol-S, (B) un alkyltine mercaptoalkanoate, et (C) un adjuvant zéolitique. Les proportions sont les suivantes : 0,01-0,08 partie en poids de (B) par partie en poids de (A), et 0,01-0,35 partie en poids de (C) par partie en poids de (A). Les compositions polymères qui renferment ces compostions d'additif présentent des propriétés améliorées.

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