National Distillers and Chemical Corporation

Quantum Chemical Corporation

Joseph Fischer

John M Hoyt

Gerald M Platz

Karl Koch

Terpolymers of ethylene, vinyl acetate and controlled amounts of isobutylene useful as pour point depressants in distillate oils.

Terpolymer of ethylene, vinyl acetate and isobutylene useful as pour

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

Pigment is finely dispersed in hydrolyzed ethylene-vinyl acetate copolymer by subjecting the copolymer to which pigment has previously been added by simple, non-intensive mixing to solution hydrolysis and/or by adding pigment to the solution hydrolysis medium prior to or during hydrolysis of the copolymer therein.

Process for the preparation of colored powders of hydrolyzed

An improvement in can covers having a peelable closure member of the pull tab or tear strip type is provided wherein the closure member is fabricated from a partially hydrolyzed ethylene-vinyl acetate copolymer obtained from the hydrolysis of from about 50 percent to about 80 percent of the vinyl acetate groups of an ethylene-vinyl acetate copolymer containing from about 40 percent to about 80 percent by weight of interpolymerized vinyl acetate.

Can cover

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

Polyvinyl chloride resin compounded with a plasticizer composition containing a monomeric ester and a liquid ethylene-vinyl acetate copolymer demonstrates significantly reduced levels of extractibles and low plasticizer migration while at the same time retaining good low temperature performance.

Extraction resistant liquid ethylene-vinyl acetate copolymer plasticized

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.

Alcoholyzed ethylene-vinyl acetate packaging material

Tacky ethylene-vinyl acetate copolymers having about 35-95% by weight vinyl acetate content are rendered agglomeration-resistant by surface treatment thereof, before, during, or after forming into particles, with a basic liquid medium to hydrolyze not more than about 10% by weight of the vinyl acetate groups originally present in the copolymer, the hydrolysis being mainly confined to the surface of the particles without effecting any significant hydrolysis of the interior of the particles. Previously agglomerated particles of ethylene-vinyl acetate copolymers containing about 35-60% by weight of vinyl acetate are deagglomerated and rendered agglomeration-resistant by a similar treatment with a basic liquid medium. Non-pelletizable, tacky ethylene-vinyl acetate copolymers containing about 60-95% by weight of vinyl acetate are rendered agglomeration-resistant, and hence pelletizable, at the expense of the hydrolysis of not more than about 10% by weight of the vinyl acetate groups present, by similar treatment before or during particle formation.

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Cincinnati, OH, United States of America

Joseph Fischer