Air Products and Chemicals, Inc.

Versum Materials Us, LLC

Keith Douglas Campbell

Scott Jeffrey Weigel

Martin Devenney

Brian Keith Peterson

John F Kirner

James Edward MacDougall

Konstantinos Chondroudis

Thomas Albert Braymer

C Eric Ramberg

Keith Cendak

Christine A Costello

Madhu Anand

Lisa Deis

Chung-Ling Mao

Pushpinder S Puri

Richard Henry Bott

William E Lenney

Shafiq Fazel

Shiying Zheng

Jeffrey A Kuphal

Lisa Deis, Legal Representative

Shafiq Nisarali Fazel

Pushpinder Singh Puri

Christine Ann Costello

Substantially solvent-free aqueous polyurethane dispersions and methods of making and using the same are provided. The substantially solvent-free aqueous polyurethane dispersions are provided in a substantially solvent-free system of a prepolymer made by reacting at least one polyol, at least one polyisocyanate, at least one isocyanate-reactive compound comprising one or more ionic or potential ionic groups, and at least one isocyanate chain terminating agent.

Solvent free aqueous polyurethane dispersions and methods of making and using the same

Low dielectric materials and films comprising same have been identified for improved performance when used as performance materials, for example, in interlevel dielectrics integrated circuits as well as methods for making same. In one aspect of the present invention, the performance of the dielectric material may be improved by controlling the weight percentage of ethylene oxide groups in the at least one porogen.

Compositions for preparing low dielectric materials

A method for preparing aqueous polymer emulsions in the presence of a poly[(vinyl alcohol)-co-(vinyl amine)] copolymer as a protective colloid and aqueous polymer emulsions containing a poly[(vinyl alcohol)-co-(vinyl amine)] copolymer.

Poly[(vinyl alcohol)-CO-(vinyl amine)] copolymers as stabilizing

The present invention provides a surface modified polymeric gas separation membrane having improved selectivity, particularly for oxygen/nitrogen gas mixtures, prepared by forming a membrane of a polymer having the structural formula ##STR1## wherein R and R' can be the same or different linear, branched or cyclic alkyl group having one to twelve carbon atoms, or R can be H, with the proviso that both R and R' cannot be methyl, and n is at least 100, and treating the surface of the membrane with a fluoro-oxidizing agent at conditions sufficient to fluoro-oxidize the membrane surface.

Fluorooxidized polymeric membranes for gas separation and process for

A composite of a rigid, glassy, permeable membrane of a silyl or germyl-containing polyacetylene and a thin surface layer of a plasma polymerized monomer having pendant nitrogen heterocycles is provided; the composite has high flux and selectivity and is particularly useful for separating gas mixtures containing at least two components having different permeabilities through the composite structure.

Plasma-assisted polymerization of monomers onto polymers and gas

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Slatington, PA, United States of America

Keith Douglas Campbell