National Distillers and Chemical Corporation

Quantum Chemical Corporation

John M Hoyt

Joseph Fischer

Steven D Blazey

Karl Koch

Julian Feldman

Ervin G Pritchett

Mathew Williams, Jr

Dorothee M McClain

The present disclosure is directed to a flexible delamination-resistant structure especially adapted for use in food packaging, such as in the construction of a retortable pouch. The structure comprises at least two adjacent films, at least one of which is aluminum, having interposed therebetween, as an adhesive for said films, a partially hydrolyzed ethylene-vinyl acetate copolymer obtained from the hydrolysis of from about 60 percent to about 80 percent of the vinyl acetate groups of an ethylene-vinyl acetate copolymer containing from about 30 percent to about 60 percent by weight of interpolymerized vinyl acetate.

Flexible film laminates and packaging

A composition of matter is disclosed comprising a saturated elastomer having an active halogen-containing cure site, sulfur and a quaternary ammonium salt of a mineral acid. The invention also provides a process for vulcanizing the above composition.

Process for vulcanizing saturated elastomers with halogen cure sites

Sulfur vulcanization system for saturated elastomers having active

A composition of matter is disclosed comprising (1) a saturated elastomer having an active halogen-containing cure site, (2) a soap/sulfur cure system, and (3) a phase transfer compound. The phase transfer catalyst comprises a quaternary ammonium or phosphonium salt of a mineral acid or an alkylene oxide polymer. The phase transfer compounds accelerate soap/sulfur cures and make it possible to obtain acceptable cure rates with higher fatty acid soaps.

Phase transfer compounds as accelerators of soap/sulfur vulcanization

A halogenated ethylene-vinyl acetate-isobutene terpolymer is provided that has improved thermal stability.

Halogenated ethylene-vinyl acetate-isobutylene terpolymers

Sulfur vulcanizable partially hydrolyzed ethylene-vinyl acetate terpolymers and processes for producing these products are disclosed.

Partially hydrolyzed ethylene-vinyl acetate (EVA) elastomers

Halogenated ethylene/vinyl acetate/isobutylene terpolymers

A C.sub.1 -C.sub.4 alkanol and its corresponding acetate or a C.sub.1 -C.sub.2 alkanol and its corresponding propionate are separated by extractive distillation utilizing an aromatic hydrocarbon as the extractive solvent. Transesterification of lower alkanols and lower alkyl acetates or propionates is effected by means of extractive distillation and the preparation of an intermediate ester of a higher boiling alcohol.

Extractive distillation of alcohol-ester mixtures

Extractive distillation of alcohol-ester mixtures and transesterification

The Mooney viscosity and green strength of ethylene-vinyl acetate (EVA) copolymer gum stock is improved by the addition thereto of a suitable elastomer such as: high viscosity ethylene propylene rubber (EPR); nitrile rubber; polychloroprene; polyacrylate rubber; polyurethane; chlorinated polyethylene; polyester; ethylene-propylene diene monomer (EPDM) terpolymer; and other elastomers such as ethylene-methyl acrylate, ethylene butyl acrylate and acrylonitrile types.

Ethylene-vinyl acetate copolymer rubbers

Blends of ethylene-vinyl acetate copolymer rubbers with elastomers

Process for the production of partially-alcoholyzed ethylene-vinyl ester interpolymers by controlled alcoholysis of the base resins in which discoloration is suppressed by gas-sparging the base polymer in solution prior to alcoholysis.

Gas-sparging of ethylene-vinyl ester interpolymers to suppress

A process for forming dispersions of ethylenevinyl acetate copolymers using an alkali metal soap of higher carboxylic acids as dispersing agent.

Polymer dispersion process

Alcoholyzed ethylene-vinyl acetate resins and unplasticized, thermoplastic packaging films constituted thereof which are suitable as food wraps, particularly for the packaging of fresh red meat. The alcoholyzed resin is prepared from an ethylene-vinyl acetate copolymer containing from about 9 to 45 weight percent combined vinyl acetate and having a melt index of from about 0.1 to 70 g/10 min., the alcoholyzed resin containing from about 5 to 20 weight percent residual vinyl acetate and having a melt index of from about 0.1 to 100 g/10 min. Preferred films prepared from these alcoholyzed resins exhibit oxygen transmission rates in excess of about 350 cc/100 sq.in./24 hr./atm. at 23.degree. C, carbon dioxide transmission rates in excess of about 1000 cc/100 sq.in/24 hr./atm. at 23.degree. C, and moisture vapor transmission rates of from about 10 to 50 g/100 sq.in./24 hr. at 100.degree. F and 90% relative humidity (R.H.), essential characteristics of the thermoplastic films for wrapping cuts of fresh red meat.

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Cincinnati, OH, United States of America

John M Hoyt