E.i. Dupont De Nemours and Company

Charles Winfield Stewart

Robert Clayton Wheland

Viacheslav Alexandrovich Petrov

Andrew Edward Feiring

William Brown Farnham

Weiming Qiu

Bruce E Smart

Colin Anolick

John Russell Crompton, Jr

Kiu-Seung Lee

Kenneth George Sharp

Michael Joseph Michalczyk

Sundar Kilnagar Venkataraman

Donnan E Priester

James M Donatello

Maurice Armand Baumann

Donnan Edwin Priester

The present invention relates to in situ polymerization of fluoropolymer into porous substrates, to improve resistance to degradation by wetting and staining, and wood, to improve resistance to degradation, staining and warping.

In situ fluoropolymer polymerization into porous substrates

Disclosed herein are novel amorphous tetrafluoroethylene-hexafluoropropylene (TFE-HFP) dipolymers, and other copolymers containing TFE, HFP and a third monomer, many of which are more random than previous amorphous TFE-HFP copolymers, as well as a novel high productivity continuous process for making these polymers. The polymers are particularly useful in the form of coatings, films and encapsulants.

Amorphous tetrafluoroethylene-hexafluoropropylene copolymers

Polymer compositions containing a mixture of an elastomer and a fluoropolymer can be made by diffusing fluorinated olefins and free radical initiators in preferably swollen elastomers and polymerizing the fluorinated olefins. The resulting compositions have useful properties, such as reduced sliding friction, which makes them useful for seals in contact with moving surfaces, and for other uses.

Thermoplastic fluoropolymer containing elastomer and production process

Fluoropolymer resin is extrusion foamed at low temperature using carbon dioxide as the foaming agent.

Extrusion foaming of fluoropolymers

This invention relates to a fluoropolymer nanocomposite comprising a fluoropolymer phase and an inorganic oxide phase dispersed throughout, said inorganic oxide phase having either no particles or particles substantially all of which have a particle size of less than about 75 nm which can be determined by small angle x-ray scattering and transmission electron microscopy techniques. These nanocomposites are useful as protective coatings.

Fluoropolymer nanocomposites

Polar-side-group-containing extrusion adjuvants, such as ethylene diamine tetraacetic acid or ionomer, that counteract the deleterious effect of certain additives such as zinc stearate, used in polyolefins on the performance of fluoropolymer processing aids in polyolefins are taught.

Processing aid system for polyolefins

Growing community of inventors

Newark, DE, United States of America

Charles Winfield Stewart