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US 10,119,012 B2Granted
Flame-retarded polyolefin polymer composition with reduced antimony trioxide content
AssigneeICL-IP America Inc.
InventorsYelena Assor, Loir Melamed, Marc Leifer, Sergei V. Levchik, Eyal Eden
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Abstract
There is provided herein a flame-retarded polyolefin polymer composition with reduced antimony trioxide content comprising: (a) at least one polyolefin polymer; (b) at least one brominated flame retardant (c) at least one antimony trioxide synergist and, (d) at least one calcium borate on an inorganic carrier. There is also provided a method of making said flame retarded polyolefin polymer composition and article thereof.
Claims18
A flame-retarded polyolefin polymer composition comprising:
- (a) at least one polyolefin polymer in an amount from about 50 wt % to about 95 wt %;
- (b) at least one brominated flame retardant in an amount of from about 2 wt % to about 40 wt %;
- (c) at least one antimony synergist in an amount of from about 0.5 wt % to about 10 wt % and,
- (d) calcium borate on an inorganic carrier which is made by a process of reacting boric acid and lime in the presence of the inorganic carrier, and which is present in an amount of from about 1 wt % to about 10 wt %, and wherein the inorganic carrier is selected from the group consisting of aluminum hydroxide, boehmite, natural calcium carbonate, precipitated calcium carbonate, calcium sulphate, carbon black, carbon fibers, clay, cristobalite, diamotaceous earth, dolomite, feldspar, graphite, glass beads, glass fibers, kaolin, metal powders or fibers, mica muscovite, mica phlogopite, natural silica, synthetic silica, silicates, nepheline-syenite, talc, whiskers, natural wollastonite, or synthetic calcium silicate, and combinations thereof,
- all said amounts being based on the total weight of the flame-retarded polyolefin polymer composition, and wherein the composition contains from 10 wt % to about 90 wt % less antimony synergist than the amount of antimony synergist present in an identical flame-retarded polyolefin polymer composition that is in the absence of the calcium borate on the inorganic carrier while still providing a V-0 flame retardancy.
2 more elements
A method of making a flame-retarded polyolefin thermoplastic article comprising:
- (1) blending:
- (a) at least one polyolefin polymer in an amount from about 50 wt % to about 95 wt %;
- (b) at least one brominated flame retardant in an amount of from about 2 wt % to about 40 wt %;
- (c) at least one antimony synergist in an amount of from about 0.5 wt % to about 10 wt %;
- (d) calcium borate on an inorganic carrier which is made by a process of reacting boric acid and lime in the presence of the inorganic carrier, in an amount of from about 1 wt % to about 10 wt %,
- wherein the inorganic carrier is selected from the grout) consisting of aluminum hydroxide, boehmite, natural calcium carbonate, precipitated calcium carbonate, calcium sulphate, carbon black, carbon fibers, clay, cristobalite, diatomaceous earth, dolomite, feldspar, graphite, glass beads, glass fibers, kaolin, metal powders or fibers, mica muscovite, mica phlogopite, natural silica, synthetic silica, silicates, nepheline-svenite, talc, whiskers, natural wollastonite, or synthetic calcium silicate, and combinations thereof;
- and optionally, at least one selected from the group consisting of an antidripping agent, a filler, an antioxidant, a heat stabilizer and a lubricant, to provide a flame-retarded polyolefin polymer composition, all said amounts being based on the total weight of the flame-retarded polyolefin polymer composition, which composition contains from 10 wt % to about 90 wt % less antimony synergist than the amount of antimony synergist present in an identical flame-retarded polyolefin polymer composition that is in the absence of calcium borate on the inorganic carrier while still providing a V-0 flame retardancy;
- and,
- (2) shaping the flame retarded polymer composition into a flame-retarded thermoplastic polyolefin article.
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Dependencies are inferred from the claim text.