E.i. Dupont De Nemours and Company

Other

Dewey Lynn Kerbow

Paul Douglas Brothers

Ming-Hong Hung

Hermann Jenewein

Giampiero Morini

Samuel David Arthur

Thomas Joseph Leck

Ofelia Fusco

Subhash Vishnu Gangal

Charles W Stewart, Sr

Mark F Teasley

Rinaldo Soria Schiffino

Jerrel Charles Anderson

Laurence Waino McKeen

Dana P Carlson

Allan Harold Olson

Patrick Edward Lindner

John F Imbalzano

David A Culver

Subash Vishnu Gangal

Robert G Brown

Scot David Pedersen

Tiziano Dall 'Occo

Laurence W Mckeen

&#x3b1;-Olefins are made in a modified plug flow reactor system by the oligomerization of ethylene using an iron complex of a selected diimine of a 2,6-pyridinecarboxaldehyde(bisimine) or 2,6-diacylpyridine(bisimine) as the oligomerization catalyst. The reactor is modified to add the iron complex at two or more points along the length of the plug flow reactor, the distance between addition points being dependent on the half-life of the active ethylene oligomerization catalyst.

Process of producing &#x3b1;-olefins

Processes for the polymerization of olefins in which late transition metal complexes, such as nickel, iron, cobalt and palladium complexes, are used as a polymerization catalyst have improved polymer productivity when oxidizing agents are present during at least a portion of the polymerization. The polymers produced are useful as elastomers, for packaging films, and molding resins.

Polymerization process

A fluoropolymer comprising fluorinated vinyl ethers having cyanate or carbamate pendant functionality is disclosed. The fluoropolymer may further comprise at least one other fluorinated or non-fluorinated monomer. An article coated with said fluoropolymer is also disclosed.

Fluorocyanate and fluorocarbamate monomers and polymers thereof

A composition comprising a plurality of multicomponent particles, one component of each of the particles being melt fabricable fluoropolymer and another component of each of the particles being a high temperature resistant non-dispersed polymer binder. The components of the particles are bound together by mechanical engagement, or alternatively, by chemical interaction. The composition is preferably in the form of a free-flowing powder which is not subject to segregation of component resins during shipping or processing.

Multicomponent particles of fluoropolymer and high temperature resistant non-dispersed polymer binder

Copolymers of tetrafluoroethylene and ethylene having modifiers comprising perfluoro(alkyl vinyl ether) have low melting points. The copolymers also have low flex modulus.

Low-melting tetrafluoroethylene copolymer

Fluorinated vinyl ethers having cyanate or carbamate groups are useful as monomers in making fluoropolymers having functional sites.

Particles of melt-fabricable fluoropolymer resin have functional units only in the particle shell.

Fluoropolymers having core/shell structure with functional units in the

Compounds containing polar functional entities can be grafted onto the surface of fluoropolymer powders to obtain grafted fluoropolymer powders having modified surface characteristics but without modifying the bulk of the polymer in the particle. The grafted fluoropolymer powder is effective in such uses as an adhesive to join dissimilar materials.

Grafted fluoropolymer powders and method of making thereof

Grafted fluoropolymer powders

A low smoke and flame-resistant fluoropolymer composition, useful as insulation in a plenum cable and comprised of a base polymer of ethylene units, tetrafluoroethylene and/or chlorotrifluoroethylene units, and fluorine-containing, non-telogenic termonomer units; a metal oxide; and a polytetrafluoroethylene drip suppressant.

Low smoke and flame-resistant composition

A tetrafluoroethylene/perfluoro(alkyl vinyl)ether copolymer substantially free of unstable end groups and extractable fluoride that cause corrosion of metal surfaces.

Stable tetrafluoroethylene copolymers

A radiant heat reflective composition comprising a blend of a tetrafluoroethylene copolymer and copper flake.

Heat reflective polymer blends

A tetrafluoroethylene-perfluoro(alkyl vinyl ether copolymer in which heat unstable carbinol end-groups (--CH.sub.2 OH groups) present have been protected against heat degradation by treating the copolymer with NH.sub.3 or NH.sub.3 producing compounds.

Growing community of inventors

Landenberg, PA, United States of America

Dewey Lynn Kerbow