Flame retardant flexibilized polyphenylene ether compositions
OwnerGim F. Lee, Jr.inventor
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Abstract
There are provided flame retardant, flexibilized thermoplastic compositions which comprise, in admixture, a normally flammable polyphenylene ether resin, an aromatic phosphate plasticizer in an amount at least sufficient to provide a flame retardant, flexibilized composition after molding, and a thermoplastic elastomer comprising a block copolymer of a vinyl aromatic compound and a diene monomer. Preferred features comprise such compositions which also include a halogenated hydrocarbon, alumina trihydrate and/or elemental red phosphorus.
Claims16
A flame retardant, flexibilized thermoplastic composition which comprises, in admixture:
- (a) a normally flammable polyphenylene ether resin;
- (b) 65 to 100 parts by weight of a flame retardant aromatic phosphate plasticizer based upon 100 parts by weight of (a);
- and
- (c) 10 to 100 parts by weight of a thermoplastic elastomer, based upon 100 parts by weight of (a), comprising an A-B-A.sup.1 block copolymer wherein terminal blocks A and A.sup.1 are polymeric units of a vinyl aromatic compound and center block B is a polymer of a conjugated diene.
A flame retardant, flexibilized thermoplastic composition which is comprised of, in admixture:
- (a) a normally flammable polyphenylene ether resin;
- (b) 65 to 100 parts by weight of a flame retardant aromatic phosphate plasticizer based upon 100 parts by weight of (a);
- and
- (c) 10 to 100 parts by weight of a thermoplastic elastomer, based upon 100 parts by weight of (a), comprising an A-B-A.sup.1 block copolymer wherein terminal blocks A and A.sup.1 are polymeric units of a vinyl aromatic compound and center block B is a polymer of a conjugated diene, wherein component (b) is the flame retardant plasticizer in the composition.
A flame retardant, flexibilized thermoplastic composition consisting of, in admixture:
- (a) a normally flammable polyphenylene ether resin;
- (b) 65 to 100 parts by weight of a flame retardant aromatic phosphate plasticizer based upon 100 parts by weight of (a);
- and
- (c) 10 to 100 parts by weight of a thermoplastic elastomer, based upon 100 parts by weight of (a), comprising an A-B-A.sup.1 block copolymer wherein terminal blocks A and A.sup.1 are polymeric units of a vinyl aromatic compound and center block B is a polymer of a conjugated diene.
Dependencies are inferred from the claim text.