Bentonite/halogen flame retarding additive
AssigneeGeneral Motors Corporation
InventorsRam K. S. Mehta, Philip Weiss
Life of this patent
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Abstract
In accordance with a preferred embodiment of this invention, a fire resistant acrylonitrile-butadiene-styrene (ABS) copolymer composition is provided. The fire retarding additive used in this composition is a combination of magnesium bentonite and a compatible halogenated organic compound of the type that can be used in combination with an antimony containing compound to form a synergistic fire retarding additive for polymer compositions.
Claims4
A fire retardant composition comprising a uniform blend of an ABS resin and at least about 3 to 5% by weight of said resin of a synergistic fire retardant additive combination consisting essentially of
- a bentonite clay taken from the group consisting of hydrogen bentonite, alkali metal bentonites and alkaline earth metal bentonites, said clay having a volume swell in water of at least about 50% and a cation exchange capacity of at least about 30 milliequivalents per 100 grams;
- and
- a halogenated aliphatic, aromatic, or alicyclic compound,
- said additive combination containing at least as many parts by weight of said bentonite clay as said halogenated aliphatic, aromatic or alicyclic compound.
A fire retardant composition comprising a uniform blend of an ABS resin and at least about 3 to 5% by weight of said resin of a synergistic fire retardant additive combination consisting essentially of
- a bentonite clay selected from the group consisting of magnesium bentonite and hydrogen bentonite;
- and
- a halogenated aliphatic, aromatic, or alicyclic compound,
- said additive combination containing at least as many parts by weight of said bentonite clay as said halogenated aliphatic, aromatic, or alicyclic compound.
In a fire resistant composition comprising a uniform blend of an ABS copolymer and a synergistic fire retarding additive combination the improvement comprising
- as the synergistic fire retarding additive combination a mixture present in at least about 3 to 5% by weight of
- a bentonite clay selected from the group consisting of hydrogen bentonite, an alkali metal bentonite and an alkaline earth metal bentonite, said clay having a volume swell in water of at least about 50% and a cation exchange capacity of at least about 30 milliequivalents per 100 grams;
- and
- a halogenated aliphatic, aromatic, or alicyclic compound,
- said mixture containing at least as many parts by weight of said bentonite clay as said halogenated aliphatic, aromatic or alicyclic compound.
In a fire resistant composition comprising a uniform blend of an ABS copolymer and a synergistic fire retarding additive combination the improvement comprising
- as the synergistic fire retarding additive combination a mixture present in at least about 3 to 5% by weight of
- a bentonite clay selected from the group consisting of hydrogen bentonite, an alkali metal bentonite and an alkaline earth metal bentonite, said clay having a volume swell in water of at least about 50% and a cation exchange capacity of at least about 30 milliequivalents per 100 grams, and
- a halogenated organic compound having at least 35% by weight of a halogen selected from the group consisting of chlorine and bromine, and said halogenated compound being of the type suitable for use with antimony oxide to form a synergistic fire retardant additive for use in organic polymer compositions,
- said mixture containing at least as many parts by weight of said bentonite clay as said halogenated organic compound.
Dependencies are inferred from the claim text.