Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2009-03-26
2010-11-16
Gulakowski, Randy (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
C525S069000, C525S450000, C264S901000
Reexamination Certificate
active
07834092
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 R3is hydrogen or an alkyl group with 1-6 carbon atoms, such as methyl, and R4is glycidyl; and optionally (c) one or more olefins of the formula CH2═C(R1)CO2R2, where R1is hydrogen or an alkyl group with 2-8 carbon atoms and R2is 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.
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Flexman Edmund Arthur
Uradnisheck Julius
Dollinger Mike
E. I. du Pont de Nemours and Company
Gulakowski Randy
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