Flame retardant compositions
First Claim
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1. A composition comprising:
- (a) a thermoplastic polymer and at least one primary flame retardant consisting of a chlorine or bromine containing organic compound;
(b) a secondary flame retardant agent in an amount sufficient to give an improved oxygen index, said agent comprising;
about 0.05 to about 15 weight percent of one or more nitrate containing compounds selected from the group consisting of sodium nitrate, ammonium nitrate, metal ammine nitrates and guanidine nitrates.
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Abstract
This invention relates to thermoplastic resin compositions having improved oxygen index values comprising a thermoplastic resin, a nitrate containing compound and a halogenated organic compound.
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Citations
11 Claims
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1. A composition comprising:
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(a) a thermoplastic polymer and at least one primary flame retardant consisting of a chlorine or bromine containing organic compound; (b) a secondary flame retardant agent in an amount sufficient to give an improved oxygen index, said agent comprising;
about 0.05 to about 15 weight percent of one or more nitrate containing compounds selected from the group consisting of sodium nitrate, ammonium nitrate, metal ammine nitrates and guanidine nitrates. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A composition comprising a resinous polymer of propylene, 2.0 to 20 parts by weight tetrabromophthalic anhydride, and 0.1 to 3.0 parts by weight ammonium nitrate.
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10. A composition comprising a resinous polymer of styrene, 2 to 20 parts by weight tetrabromophthalic anhydride, and 0.1 to 3 parts by weight ammonium nitrate.
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11. A composition comprising a resinous homopoly(butylene terephthalate), 2 to 20 parts by weight tetrabromophthalic anhydride and 0.1 to 3 parts by weight ammonium nitrate.
Specification