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US 8,138,247 B2Granted
Polyoxymethylene compositions and articles made from these
AssigneeE.I. du Pont de Nemours and Company
InventorsKenichi Shinohara, Maiko Shibuya
Life of this patent
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Abstract
Polyoxymethylene compositions comprising (a) 20 to 80 weight percent polyacetal homopolymer, copolymer, or mixtures of these; (b) 5 to 40 weight percent glass fiber; (c) 0.1 to 2 weight percent polymeric thermal stabilizer selected from the group consisting of polyacrylamide, polymethacrylamide, and mixtures of these; (d) 0.02 to 2 weight percent allantoin; and 0.1 to 5 weight percent of an ethylene copolymer of the formula E/X/Y; wherein Y includes a glycidyl group. Articles made from these compositions.
Claims4
A polyacetal thermoplastic composition comprising:
- a) 20 to 80 weight percent polyacetal polymer,
- the polymer being homopolymer, copolymer, or mixtures of these;
- b) 5 to 40 weight percent glass fiber;
- c) 0.1 to 2 weight percent polymeric thermal stabilizer selected from the group consisting of a polyacrylamide, a polymethacrylamide, and mixtures of these;
- d) 0.02 to 2 weight percent allantoin;
- e) 0.1 to 5 weight percent of an ethylene copolymer of the formula E/X/Y, wherein each of the a) to e) components is based on the weight of the composition;
- and
- wherein:
- E comprises 40 to 90 weight percent of the ethylene copolymer and is the radical formed from ethylene;
- X comprises 10 to 40 weight percent of the ethylene copolymer and is a radical formed from monomers selected from the group consisting of CH2═CH(R1)—C(O)—OR2,
- wherein R1 is H, CH3 or C2H5, R2 is an alkyl group having 1-8 carbon atoms, vinyl acetate, or a mixture of these;
- and
- Y comprises 0.5 to 20 weight percent of the ethylene copolymer and is a radical formed from monomers selected from the group consisting of
- CH2═CH(R1)—C(O)—OR3
- wherein R3 is glycidyl, and R1 is R1 is H, CH3 or C2H5.
12 more elements
Dependencies are inferred from the claim text.