Stabilized flame retardant additives and their use
OwnerDaniel A. De Schryverinventor
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Abstract
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) an 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.
Claims32
A flame retardant additive composition having enhanced thermal stability which comprises 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) an alkyltin mercaptoalkanoate, and (C) azeolite adjuvant, in proportions of 0.01 to 0.08 part by weight of(B) per part by weight of (A), and 0.01 to 0.35 part by weight of (C) per part by weight of (A).
A composition comprising a vinylaromatic polymer or a polyolefin polymer with which has been blended a flame retardant quantity of (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) an alkyltin mercaptoalkanoate, and (C) a zeolite adjuvant, in proportions of 0.01 to 0.08 part by weight of (B) per part by weight of (A), and 0.01 to 0.35 part by weight of (C) per part by weight of (A), components (A), (B), and (C) having been blended with the polymer as a preformed blend thereof and/or individually and/or in any sub-combination(s) or blend(s) of any two or more of said components.
Dependencies are inferred from the claim text.