E.i. Dupont De Nemours and Company

Other

The Chemours Company Tt, LLC

Joy Sawyer Bloom

Robert Clayton Wheland

Kiu-Seung Lee

Timothy Allan Bell

James Carroll

Thomas Paul Feist

Robert F Davis

Daniel E George

Charles Keller

Ed Miller

Daniel Eugene George

John D Connolly Jr

The invention provides a treated powder having improved loose bulk density comprising a silanized inorganic powder treated with a long chain fatty acid or salts thereof, wherein the amount of the long chain fatty acid is about 0.25% to about 2 wt %, based on the total weight of the treated powder.

Increased bulk density powders and polymers containing them

Increased bulk density of fatty acid-treated silanized powders and polymers containing the powders

The invention is directed to a thermoplastic condensation polymer chain extender additive package for reducing the molecular weight loss of a thermoplastic condensation polymer during a heated process comprising a chain extender composition selected from the group consisting of (a) a mixture of a chain extending agent and a water-bearing particulate material (b) a water-bearing particulate material surface treated with a chain extending agent or (c) a combination of (a) and (b). The water-bearing particulate material can be titanium dioxide pigment, the chain extending agent can be a multifunctional epoxy compound and the condensation polymer can be polyethylene terephthalate, polybutylene terephthalate or polycarbonate.

Additive package for thermoplastic condensation polymers

A high temperature liquid crystalline polyester (LCP) composition, and articles made therefrom, that provides 'good' to 'excellent' wear resistance at PVs (pressure&#xd7;velocity) of at least 1.75 MPa-m/s (50,000 psi-fpm). The high temperature LCP being a matrix material containing lubricating fillers and having an onset of melting temperature of at least 320&#xb0; C.

High temperature LCP for wear resistance

The present invention relates to in situ polymerization of fluoropolymer into porous substrates, to improve resistance to wear, tear and creep, decay, and degradation by wetting, staining and warping, and to improve durability while maintaining the appearance of the substrate.

In situ fluoropolymer polymerization into porous substrates

Situ fluoropolymer polymerization into porous substrates

A uniform cross-section and ribbed thermoplastic compressor valve which can be used as a discharge valve for a compressor and has internal rib structure and uniform wall thickness. The valve member can be made of high-performance polymeric resin such as polyimide. The valve member comprises a base member, an annular wall member, a central member protruding from the base member, and a plurality of internal wall members. The internal wall members provide the internal rib structure which strengthens the valve member and allows for light-weight construction. Preferably, there are six internal wall members and the central member has a cavity.

Uniform cross-section and ribbed thermoplastic compressor valve

Polyimide compositions can be substantially improved by incorporating in the composition an inorganic, low hardness, thermally stable, sheet silicate, such as muscovite mica, talc, and kaolinite, which results in improved wear resistance and reduced coefficient of friction.

Polyimide compositions with improved wear resistance and friction at

New polyimide polymeric blends which are environmentally friendly during compounding and give improved coefficient of friction in shaped articles prepared therefrom are provided by blending polyimides which are at least 90% imidized and substantially solvent free and have a mean particle size of about 30 .mu.m or less with at least one melt processible thermoplastic liquid crystalline polymer or polyamide and a lubricant.

Polyimide polymeric blends

Laminar structures of PVF and substantially amorphous resin such as PEKK, backfilled with injection molding resin, exhibit an excellent combination of physical and aesthetic properties.

Molded PVF laminar structures

A thermoformable polyaryletherketone sheet of a thickness of about 625-5000 micrometers, having repeating units derived from diphenyl ether and terephthalyl and isophthalyl groups, especially a polyetherketoneketone in which the terephthalyl to isophthalyl isomer ratio is about 70:30 to 0:100, especially 60:40 to 50:50, which thermoformable sheet has a crystallinity of 5% of less, can be fabricated into three-dimensional articles such as, e.g., panels and ducts for aircraft interiors having good formability and mold replication.

Thermoformable polyaryletherketone sheet

A thermoformable laminate comprising (1) a polyaryletherketone sheet having repeating units derived from diphenyl ether having attached to one of the phenyl rings either a 1,4-phenylenedicarbonyl group or a 1,3-phenylenedicarbonyl group, the ratio of 1,4-phenylenedicarbonyl groups to 1,3-phenylenedicarbonyl groups being 70:30 to 0:100, preferably 60:40 to 0:100, especially 60:40 to 50:50, the sheet thickness being about 625-5000 micrometers, and (2) a polyvinyl fluoride film having a thickness of about 12.8 to 204 micrometers can be thermoformed at a temperature of about 160.degree.-200.degree. C., especially 170.degree.-195.degree. C. One important application of such thermoformable sheets is in fabricating three-dimensional panels for aircraft interiors.

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Wilmington, DE, United States of America

Joy Sawyer Bloom