Flame-retarded compositions of styrene-containing polymers
AssigneeBromine Compounds Ltd.
InventorsYoav Bar-Yaakov, Ita Finberg, Rachel Shtekler, Pierre Georlette
Life of this patent
Estimating the term…
Abstract
A flame-retarded styrene-containing polymer composition, which comprises a styrene-containing polymer, tris(2,4,6-tribromophenoxy)-s-triazine, 0.5-1.7 wt % antimony trioxide, and an anti-dripping agent. The bromine content of the composition is generally in the range between 8 and 18 wt %. Additional brominated flame retarding agents may also be included in the composition.
Claims21
A flame-retarded styrene-containing polymer composition, which comprises a styrene-containing polymer at a concentration of not less than 50 wt %, said polymer being selected from the group consisting of High Impact Polystyrene (HIPS) and acrylonitrile butadiene styrene copolymer (ABS), 0.5-1.5 wt % antimony trioxide, tris(2,4,6-tribromophenoxy)-s-triazine and an anti-dripping agent, wherein the bromine content of the composition provided by said tris(2,4,6-tribromophenoxy)-s-triazine, {Bromine(FR-245)}, is in the range between 8 and 18 wt %, and when the styrene-containing polymer is high impact polystyrene (HIPS), then said Bromine(FR-245) is related to the weight concentration of said antimony trioxide {[Sb2O3]} by the following inequalities:
- Bromine(FR-245)≧−4×[Sb2O3]+15, for 1.0≦[Sb2O3]≦1.5 (i)
- Bromine(FR-245)≧−10×[Sb2O3]+21, for 0.5≦[Sb2O3]<1.0 (ii)
- with the percentages being by weight relative to the total weight of the flame-retarded styrene-containing polymer composition, wherein the composition meets a UL 94 rating of V-1 or V-0.
A masterbatch composition suitable for a preparation of styrene-containing polymeric compositions, said masterbatch comprising:
- (i) not less than 50 wt % of tris(2,4,6-tribromophenoxy)-s-triazine;
- (ii) antimony trioxide;
- and
- (iii) a polymer carrier;
- wherein a weight ratio between the total bromine content of said masterbatch and antimony trioxide is not less than 7.
A flame-retarded styrene-containing polymer composition, which comprises a styrene-containing polymer at a concentration of not less than 50% wt %, said polymer being selected from the group consisting of High Impact Polystyrene (HIPS) and acrylonitrile butadiene styrene copolymer (ABS), 0.5-1.5 wt % of antimony trioxide, an anti-dripping agent, tris(2,4,6-tribromophenoxy)-s-triazine and at least one additional brominated flame retarding agent, wherein the total bromine content of the composition is in the range between 11 and 18 wt %, with the percentages being by weight relative to the total weight of the flame-retarded composition, wherein the composition meets a UL 94 rating of V-1 or V-0.
Dependencies are inferred from the claim text.