Hoechst Celanese Corporation

Celanese Gmbh

The Sherwin Williams Company

Raymond W Rupp

Donna L Keene

Richard Vicari

Charles E McChesney

Joseph J Baron, Jr

Marvin L Doerr

Stephen M Sinker

George W Halek

William T Freed

Stanley L Pauls

James E Mulvaney

Jerome S Schaul

A surface or electrically active material comprising an alternating copolymer having the formula ##STR1## wherein X and Y oppositely consist of an electron accepting and an electron donating group or a hydrophobic group and an ionic or non-ionic hydrophilic group.

Surface or electrically active copolymers of poly(4-substituted

4-Acetoxystyrene is homopolymerized and copolymerized in aqueous emulsion and, without isolation, the polymer is hydrolyzed to homopolymers and copolymers of p-vinylphenol with a base. Homopolymers and copolymers of p-vinylphenol are used as epoxy resin curing agents and in the preparation of epoxy resins by reaction with epichlorohydrin.

Emulsion polymerization of 4-acetoxystyrene and hydrolysis to

There is disclosed an improved modified polymer suitable for use in making hollow containers by conventional extrusion blow molding. It is a specific type of end-capped and branched polyethylene terephthalate polymer or copolymer. In the improvement, the end-cap comprises the reacted component of a difunctional acid or alkali metal salt of a difunctional acid having the formula: ##STR1## wherein: X has a valency of 6 and is selected from sulfur, selenium, and tellurium;

Modified PET polymers and copolymers suitable for extrusion blow molding

There is disclosed a process for reducing the acetaldehyde content and the generation rate of acetaldehyde of polyethylene terephthalate chip which has a crystallinity of at least about 30% in order to render the polyethylene terephthalate suitable for making containers which are useful in the carbonated beverage industry. This process comprises stabilizing the polyethylene terephthalate by heating it at an elevated temperature in air and maintaining an air to chip ratio at a predetermined value of at least about 0.8 standard cubic foot of air per minute/pound of resin per hour and at a vapor velocity of at least about 0.5 foot per second. The air used in the stabilization process has a dew point of less than about -30.degree. C. The stabilized polyethylene terephthalate produced by this process has an acetaldehyde level of less than about 2.5 parts per million, a generation rate of acetaldehyde of less than about 3.0 parts per million per minute and an intrinsic viscosity of from about 0.60 to about 0.95 deciliters per gram. There is also disclosed a process for molding a polyethylene terephthalate preform comprising melting the above described polymer, forming it into the desired preform shape, and cooling the molten polymer. This preform may then be reheated above its glass transition temperature and molded into the desired container shape.

Process for preparing polyethylene terephthalate useful for beverage

The invention relates to photoconductive N-vinyl carbazole copolymers characterized as having electron donor and electron acceptor groups in the same polymeric chain and the use of said copolymers as photoconductive materials on various substrates.

Photoconductive N-vinyl carbazole copolymers and process for preparing

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Corpus Christi, TX, United States of America

Raymond W Rupp