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US 8,524,806 B2Granted
Profile extrusion method, article, and composition
AssigneeSabic Innovative Plastics IP B.V.
InventorsJohannes GM Matthijssen, Johannes Everardus Fortuyn
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Abstract
A glass fiber-filled poly(arylene ether)/polyamide composition exhibits reduced die build-up during profile extrusion. The composition includes specific amounts of polyamide, poly(arylene ether), glass fibers, and polypropylene. The reduced die build-up means that the profile extrusion equipment needs to be shut down and cleaned less often, resulting in a substantial productivity improvement.
Claims28
A method of profile extrusion, comprising:
- extruding through a die a thermoplastic composition having a temperature of about 275 to about 310° C.;
- and
- cooling the extruded composition to form an extruded thermoplastic article;
- wherein the thermoplastic composition comprises the product of melt blending
- about 35 to about 55 weight percent of a polyamide,
- about 30 to about 50 weight percent of a poly(arylene ether),
- about 5 to about 15 weight percent of glass fibers,
- about 0.5 to about 4 weight percent of a polypropylene, and
- one or both of
- about 0.5 to about 2 weight percent of low density polyethylene, and
- about 0.02 to about 0.5 weight percent of a copolymer of vinylidene fluoride and hexafluoropropylene, the copolymer having a fluorine content of about 60 to about 70 weight percent based on the total weight of the copolymer;
- wherein all weight percents are based on the total weight of the thermoplastic composition unless a different weight basis is specified.
9 more elements
A thermoplastic composition, comprising:
- about 35 to about 55 weight percent of a polyamide,
- about 30 to about 50 weight percent of a poly(arylene ether),
- about 5 to about 15 weight percent of glass fibers,
- about 0.5 to about 4 weight percent of a polypropylene, and
- one or both of
- about 0.5 to about 2 weight percent of low density polyethylene, and
- about 0.02 to about 0.5 weight percent of a copolymer of vinylidene fluoride and hexafluoropropylene, the copolymer having a fluorine content of about 60 to about 70 weight percent based on the total weight of the copolymer;
- wherein all weight percents are based on the total weight of the thermoplastic composition unless a different weight basis is specified.
5 more elements
Dependencies are inferred from the claim text.