E.i. Dupont De Nemours and Company

Julius Uradnisheck

Edmund Arthur Flexman

Marion G Waggoner

Michael Robert Samuels

Fredrik Nederberg

Barry Alan Morris

Benjamin Andrew Smillie

Bhuma Rajagopalan

Thomas P Gannett

Robert J Kassal

Timothy A Libert

George David Lynch

Rolland Shin-Yuan Ro

Disclosed is a composition comprising poly(hydroxyalkanoic acid) and one or more carboxylic acids having about 10 to about 30 carbon atoms wherein the carboxylic acid is present in the composition from 0.5 to about 15%, based on the weight of the composition and the carboxylic acid includes aromatic carboxylic acid, aliphatic carboxylic acid, polycarboxylic acid, aliphatic hydroxycarboxylic acid; or combinations of two or more thereof. Also disclosed are a process that can be used for producing the composition and an article comprising the composition.

Poly(hydroxyalkanoic acid) and articles therewith

Disclosed is a toughened poly(hydroxyalkanoic acid) resin composition comprising poly(hydroxyalkanoic acid) and an impact modifier comprising a core/shell polymer that does not comprise a vinyl aromatic comonomer, having a refractive index not greater than 1.5; wherein the core comprises elastomer and the shell comprises non-elastomeric polymer. Also disclosed are packaging materials and packaged products comprising the composition.

Toughened poly(hydroxyalkanoic acid) compositions

Toughened, plasticized poly(hydroxyalkanoic acid) polymer compositions comprising poly(trimethylene ether) glycol and ethylene ester copolymers are provided.

Poly(hydroxyalkanoic acid) plasticized with poly(trimethylene ether) glycol

Disclosed are poly(hydroxyalkanoic acid) resin compositions comprising poly(hydroxyalkanoic acid), such as polylactic acid, and a polyoxymethylene. Also disclosed are articles such as films, sheets and thermoformed containers comprising the compositions.

Thermoformed articles and compositions of poly(hydroxyalkanoic acid) and polyoxymethylene

Disclosed is a process comprising extruding a poly(hydroxyalkanoic acid) (PHA) to produce a first article; thermoforming the first article in a heated mold having a temperature &#x2267; about 90&#xb0; C. to produce a second article; and heat treating the second article by holding the second article in the heated mold for less than about 40 seconds to produce a thermoformed article wherein the PHA composition comprises or consists essentially of PHA and 0 to about 4%, based on the weight of the composition, of a nucleator; and the first article is a film or sheet and is partially crystallized.

Poly(hydroxyalkanoic acid) and thermoformed articles

Disclosed are poly(hydroxyalkanoic acid) compositions comprising a poly(hydroxyalkanoic acid) polymer, such as poly(lactic acid), and an impact modifier comprising a copolymer of ethylene and one or more alkyl acrylates of the formula CH&#x2550;C(R)COR, where Ris hydrogen or an alkyl group with 1-8 carbon atoms and Ris an alkyl group with 1-8 carbon atoms, such as methyl, ethyl, or butyl.

Ethylene alkyl acrylate toughened poly(hydroxyalkanoic acid) compositions

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 CH&#x2550;C(R)COR, where Ris hydrogen or an alkyl group with 1-6 carbon atoms, such as methyl, and Ris glycidyl; and optionally (c) one or more olefins of the formula CH&#x2550;C(R)COR, where Ris hydrogen or an alkyl group with 2-8 carbon atoms and Ris 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.

Article comprising poly(hydroxyalkanoic acid)

Disclosed is a composition comprising poly(hydroxyalkanoic acid), plasticizer, and optionally a nucleator, an impact modifier, or both. Also disclosed is a process for producing a thermoformed two-dimensional article having a surface area to thickness ratio greater than about 200:1 inch.

Plasticized poly(hydroxyalkanoic acid) composition

Disclosed is a single layer or multilayer polymeric structures that comprise a liquid crystalline polymer barrier resin. Such films have improved optical clarity and lower surface roughness measurements, without sacrificing desired barrier properties. These structures are useful for many packaging applications including pouches and bags and lidding applications.

Liquid crystalline polymer barrier resin films and processes thereof

Disclosed are poly(hydroxyalkanoic acid) compositions comprising a poly(hydroxyalkanoic acid), an ethylene ester copolymer, and an aliphatic carboxylic acid amide.

Poly (hydroxyalkanoic acid) compositions with improved toughness, dimensional stability and stretchability

Disclosed are toughened poly(hydroxyalkanoic acid) resin compositions comprising poly(hydroxyalkanoic acid), such as polylactic acid, and an impact modifier comprising an ethylene copolymer made from monomers (a) ethylene; (b) one or more olefins of the formula CH&#x2550;C(R)COR, where Ris hydrogen or an alkyl group with 2-8 carbon atoms and Ris an alkyl group with 1-8 carbon atoms, such as methyl, ethyl, or butyl; and (c) one or more olefins of the formula CH&#x2550;C(R)COR, where Ris hydrogen or an alkyl group with 1-6 carbon atoms, such as methyl, and Ris glycidyl. 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 agents.

A breathable film involving at least one polymeric layer of 100% neutralized ionomer containing sufficient aliphatic, mono-functional organic acid salt to essentially triple the oxygen transmission value (OTV) and/or at least one polymeric layer of metallocene polyethylene (mPE) optional blended with low density polyethylene and preferably in combination with one or more outer layers of highly neutralized ionomer (e.g., Surlyn&#xae;). Such polymeric film and polymeric film structure has sufficient oxygen permeability, water vapor transmission, formability, and structural strength to be useful in wrapping food products requiring breathable films such as case ready meat, fish, sausage, fresh produce, and the like.

Film and film structures having improved oxygen transmission, forming, and puncture resistances

Toughened poly(lactic acid) resin compositions comprising poly(lactic acid) and an impact modifier comprising an ethylene copolymer made from monomers (a) ethylene; (b) one or more olefins of the formula CH&#x2550;C(R)COR, where Ris hydrogen or an alkyl group with 2-8 carbon atoms and Ris an alkyl group with 1-8 carbon atoms, such as methyl, ethyl, or butyl; and (c) one or more olefins of the formula CH&#x2550;C(R)COR, where Ris hydrogen or an alkyl group with 1-6 carbon atoms, such as methyl, and Ris glycidyl. 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.

Toughened poly(lactic acid) compositions

Thermotropic liquid crystalline polymers are produced by the reaction of a polyester made from an aromatic dicarboxylic acid and a diol, one or more hydroxycarboxylic acids, a stoichiometric excess of an aromatic diol, and a carboxylic acid anhydride. Also disclosed are novel liquid crystalline polymers that may be produced by this process. These liquid crystalline polymers are useful as molding resins and shaped articles thereof are produced. In particular, the articles include films, sheets, containers and portions thereof comprising these LCPs.

Liquid crystalline polymers, processes for their manufacture, and articles thereof

Melt-fusible copolyimides based on pyromellitic anhydride and two defined classes of aromatic diamines, at least one diamine of each class being incorporated into the polyimide, each diamine class being present in an amount of 10-90 mole percent of the total diamine content (100 mole percent), melt below about 400.degree. C. and can be fabricated into articles, or can be applied to either fibrous or nonfibrous substrates to make prepregs, tapes, etc., which then are shaped into final articles, such as printed circuit boards or aircraft panels.

Growing community of inventors

Glen Mills, PA, United States of America

Julius Uradnisheck