Back to results
US 8,530,552 B1Granted
Poly(phenylene ether) composition, article, and method
AssigneeSabic Innovative Plastics IP B.V.
InventorsNorihiro Takamura, Michael Leslie Todt, Kirti Sharma
Life of this patent
Estimating the term…
Abstract
A composition includes specific amounts of poly(phenylene ether), polymerized styrene residue, and polymerized acrylonitrile residue. The composition can be prepared using a recycled homopolystyrene that includes an acrylonitrile copolymer as an impurity. The composition largely preserves the desirable properties of a corresponding composition prepared from virgin resins without requiring chemical compatibilization of the poly(phenylene ether) and the acrylonitrile copolymer.
Claims13
A composition comprising:
- greater than 40 to about 94.8 weight percent of a poly(phenylene ether) consisting of poly(2,6-dimethyl-1,4-phenylene ether);
- about 11 to 20 weight percent of polymerized styrene residue;
- and
- about 0.2 to less than 1.5 weight percent of polymerized acrylonitrile residue;
- wherein the polymerized acrylonitrile residue is present in the form of styrene-acrylonitrile copolymer;
- wherein the composition comprises less than or equal to 120 parts per million by weight of secondary aliphatic hydroxyl groups;
- and
- wherein all amounts are based on the total weight of the composition, unless a different weight basis is specified.
5 more elements
A composition comprising:
- about 60 to about 80 weight percent of a poly(phenylene ether) consisting of a poly(2,6-dimethyl-1,4-phenylene ether) having an intrinsic viscosity of about 0.35 to about 0.6 deciliter per gram measured at 25° C. in chloroform;
- about 5 to about 15 weight percent of polymerized styrene residue;
- about 0.4 to about 2 weight percent of a polymerized 1-butene residue;
- about 10 to about 20 weight percent of a flame retardant comprising an organophosphate ester;
- and
- about 0.2 to about 1.2 weight percent of polymerized acrylonitrile residue;
- wherein the polymerized acrylonitrile residue is present in the form of styrene-acrylonitrile copolymer;
- wherein the composition comprises less than or equal to 120 parts per million by weight of secondary aliphatic hydroxyl groups;
- and
- wherein all amounts are based on the total weight of the composition, unless a different weight basis is specified.
7 more elements
Dependencies are inferred from the claim text.