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US 2013/0172488 A1Published application
Compositions of Polyamide and Ionomer
AssigneeE.I. du Pont de Nemours and Company
InventorsRichard T. Chou, Herbert Vernon Bendler, Karlheinz Hausmann
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Abstract
Disclosed is a shaped article comprising a composition comprising polyamide and ionomer wherein the ionomer comprises a mixture of Zn and alkali metal (M2) cations wherein the Zn/M2 equivalent ratio is from about 0.6 to about 6. The articles prepared from the compositions with mixed ion ionomers exhibit high stiffness, hardness and toughness, good scratch resistance, desirable low melt viscosity and high processability.
Claims24
A shaped article comprising a polyamide/ionomer blend composition comprising
- (1) a polyamide having a melt viscosity from about 200 Pa·sec to about 4000 Pa·sec, measured at 250° C. and a shear rate of 12 sec−1, in an amount in the range of about 35 to about 70 weight % of the combination of (1) and (2);
- and
- (2) an ionomer composition in an amount in the range of about 30 to about 65 weight % of the combination of (1) and (2), wherein the ionomer composition comprises at least one neutralized acid copolymer, wherein the acid copolymer comprises copolymerized units of ethylene with
- (a) copolymerized units of an alpha-beta unsaturated monocarboxylic acid wherein the monocarboxylic acid is methacrylic acid or acrylic acid or a combination thereof;
- (b) optionally copolymerized units of an alpha-beta unsaturated dicarboxylic acid derivative selected from maleic anhydride and alkyl monoesters of maleic acid or fumaric acid, in the amount of 0 to about 7 weight % of the copolymer;
- wherein the combination of (a) and (b) when present is from about 7 to about 21 weight % of the copolymer;
- (c) optionally copolymerized units of an alkyl acrylate or alkyl methacrylate comonomer, in the amount of 0 to about 25 weight % of the copolymer;
- and
- wherein about 50 mol % to about 95 mole % of the total carboxylic acid groups in the copolymer are neutralized to salts comprising cations of zinc (Zn) and a second metal (M2) selected from Group 1 of the Periodic Table of the Elements, wherein Zn cations comprise about 10 to about 90% mole equivalents and M2 cations comprise about 90 to 10% mole equivalents.
6 more elements
Dependencies are inferred from the claim text.