US 7,834,092 B2Granted

Article comprising poly(hydroxyalkanoic acid)

AssigneeE. I. Du Pont de Nemours and Company

InventorsJulius Uradnisheck, Edmund Arthur Flexman

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Abstract

Disclosed are oriented films comprising toughened poly(hydroxy-alkanoic acid) resin compositions comprising poly(hydroxyalkanoic acid) and an impact modifier comprising an ethylene copolymer made from monomers (a) ethylene; (b) one or more olefins of the formula CH2═C(R3)CO2R4, where R3 is hydrogen or an alkyl group with 1-6 carbon atoms, such as methyl, and R4 is glycidyl; and optionally (c) one or more olefins of the formula CH2═C(R1)CO2R2, where R1 is hydrogen or an alkyl group with 2-8 carbon atoms and R2 is an alkyl group with 1-8 carbon atoms, such as methyl, ethyl, or butyl. The ethylene copolymer may further be made from carbon monoxide monomers. The compositions may further comprise one or more ethylene/acrylate and/or ethylene/vinyl ester polymers, ionomers, and cationic grafting agents. Also disclosed are packaging materials and containers comprising the oriented films.

Claims11

Dependent claims

A film comprising or prepared from a composition comprising about 60 to about 97 weight % of poly(lactic acid) and about 0.2 to about 40 weight % of an impact modifier wherein

the film is an oriented film;
and
the impact modifier comprises an ethylene copolymer that comprises repeat units derived from (a) about 20 to about 95 weight % ethylene, (b) about 0.5 to about 25 weight % of one or more first olefins of the formula CH2═C(R3)CO2R4;
(c) 3 to about 70 weight % of one or more second olefins of the formula CH2═C(R1)CO2R2, and (d) 0 to about 20 weight % carbon monoxide where R1 is hydrogen or an alkyl group with 1-8 carbon atoms, R2 is an alkyl group with 1-8 carbon atoms, where R3 is hydrogen or an alkyl group with 1-6 carbon atoms, R4 is glycidyl, the weight % of the poly(hydroxyalkanoic acid) and the impact modifier are based on the total weight of the poly(hydroxyalkanoic acid) and the impact modifier, and the weight % of ethylene, CH2═C(R1)CO2R2, or CH2═C(R3)CO2R4 is based on the copolymer weight.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 12/412,014Filed 26 Mar 2009 · continuation in part
Priority: 12 Dec 2003
Published: US 2009/0191371 A130 Jul 2009
Granted: 16 Nov 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification44 codes

C08L 67/04
Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain ; Compositions of derivatives of such polymers:…
B32B 7/12
Interconnection of layers: using interposed adhesives or interposed materials with bonding properties
B32B 15/08
Comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material: of synthetic resin
B32B 15/20
Layered products comprising a layer of metal: comprising aluminium or copper

Family

Application60/529,208Us provisional application · filed 12 Dec 2003
Application10/996,899Parent of this continuation-in-part · filed 23 Nov 2004
Application11/395,422Parent of this continuation-in-part · filed 31 Mar 2006
Application11/494,077Parent of this continuation-in-part · filed 27 Jul 2006
Application11/516,949Parent of this continuation-in-part · filed 7 Sep 2006
US 2009/0191371 A1Pre-grant publication · published 30 Jul 2009
US 7,595,363 B2Parent of this continuation-in-part
US 7,381,772 B2Parent of this continuation-in-part
US 7,354,973 B2Parent of this continuation-in-part
US 2005/0131120 A1Published application
US 2006/0173133 A1Published application
US 2007/0213466 A1Published application
US 2008/0027178 A1Published application
US 7,834,092 B2This patent

From the US filing history. Foreign family members aren’t listed.