The Dow Chemical Company

Essex Specialty Products Inc.

Theodore L Parker

Patrick H Martin

Edgar S Sanders, Jr

David R Pedersen

Paul G Schrader

John A Jensvold

Thomas O Jeanes

Donald J Perettie

Peter E Pierini

Wendy S Jacks

Terrence L Caskey

Curtis L Volkmann

Thomas W Regulski

Robert R Stringham

Nathan N Haese

Srikanth Ranga Chary

Damoder Reddy

G Robert Collins

Hans R Keller

Jerry D Moseley

Described herein is an adhesive composition comprising (a) an aromatic polyester or aromatic polycarbonate, (b) a polyepoxide, (c) an effective amount of an initiator or catalyst for the reaction of carbonate or ester groups in the aromatic polycarbonate or aromatic polyester with oxirane groups in the polyepoxide, and (d) from about 1 to about 50 weight percent of (i) a polymeric material different from (b) with pendant epoxy groups and a glass transition temperature below about 50.degree. C., or (ii) a solution of a copolymer of an an alkyl ester of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid and a hydroxyalkyl ester of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid, in a polyether polyol having a molecular weight of at least about 200; wherein the number ratio of oxirane groups in component (b) to the sum of the number of ester groups and twice the number of carbonate groups in component (a), is in the range of from about 0.8:1 to about 1.4:1. The composition of the invention has been discovered to be useful as a film adhesive in processes for bonding oily metal substrates.

Thermoformable, thermosettable adhesives prepared from epoxy resins and

The invention is a process for obtaining membranes having improved selectivity and recovery using a combination of heat treating and UV irradiation.

Membranes having improved selectivity and recovery, and process for

The invention relates to benzocyclobutene capped benzotrifluoride based fluoroaryl ether compounds which are useful in preparing semi-permeable membranes, and films and coatings useful in electronic applications.

Benzocyclobutene capped fluoroalkyl aromatic based fluoroarylether

Thermoformable, thermosettable resins essentially free of secondary alcohol groups are obtained by reaction of oxiranes in active hydrogen-free polyepoxide with carboxylate and/or carbonate groups in active hydrogen-free aryl polyesters, polycarbonates or copolyestercarbonates in the presence of catalytically effective amounts of certain polyorgano phosphonium or phosphine iminium salts.

Curing polyester or polycarbonate and polyepoxide with polyorgano

The invention releates to semi-permeable gas separation membranes derived from oligomers containing reactive end groups.

Semi-permeable membranes derived from reactive oligomers

The invention relates to novel aryl carbonate cyanoaryl ether copolymers.

Arylene carbonate cyanoaryl ether copolymer

The invention is a novel phosphonium salt, useful as an initiator or catalyst in the reaction of oxirane groups in an epoxy resin with aromatic carbonate and/or ester linkages in monomeric, oligomeric, or polymeric carbonates, esters, or estercarbonates.

Phosphonium salts

This invention relates to novel benzotrifluoride aryl ether polymers useful as high performance engineering thermoplastics and as semi-permeable gas separation membranes.

Benzotrifluoride aryl ether polymer

The invention is a novel bis(phosphoranylidene) ammonium salt useful as an initiator/catalyst in the reaction of oxirane groups in an epoxy resin with aromatic carbonate and/or ester linkages in monomeric, oligomeric, or polymeric carbonates, esters, or estercarbonates.

Novel bis(phosphoranylidene) ammonium salts

Thermoformable, thermosettable resins essentially free of secondary alcohol groups are obtained by reaction of oxiranes in active hydrogen-free polyepoxides with carboxylate and/or carbonate groups in active hydrogen-free aryl polyesters, polycarbonates or copolyestercarbonates in the presence of catalytically effective amounts of certain polyorgano phosphonium or phosphine iminium salts.

Composition of aromatic polyester copolyester carbonate or polycarbonate

The invention relates to novel aryl carbonate cyanoaryl ether gas separation membranes and a method of separating gases using such membranes.

Novel aryl carbonate cyanoaryl ether gas separation membranes

The invention relates to novel benzotrifluoride aryl ether membranes and a process for separating gases using such membranes.

Novel benzotrifluoride aryl ether gas separation membranes

Polymeric optical fiber

The invention relates to an unsaturated-epoxy moiety R--NHCO.sub.2 --E wherein R is unsaturated and free of isocyanate functionality and E has an oxirane ring. The moiety may be dissolved in a liquid epoxy compound. The invention also relates to a mixture obtained by vinyl polymerization of the moiety and an added unsaturated compound in the liquid epoxy compound solution. Epoxy cross-linking then leads to a polymeric reaction product. Vinyl polymerization and epoxy curing can also be simultaneous. A polymeric material is formed by reacting an isocyanate compound having the formula R--NCO with an epoxy compound having the formula E--OH, where R and E are as defined above, to form the moiety R--NHCO.sub.2 --E and polymerizing this moiety, along with an additional unsaturated compound under vinyl polymerization conditions and in the presence of a liquid epoxy compound, to form a copolymer of R--NHCO.sub.2 --E with the additional unsaturated compound. Cured epoxy systems are provided of improved toughness and reduced brittleness. The viscosity of a liquid epoxy compound can be controlled to be as low as is necessary for filament winding and other operations through adding an additional unsaturated compound such as styrene while the cross-linking of the liquid epoxy compounds leads to the formation of a single phase polymer.

Unsaturated epoxy moiety, unsaturated monomer and liquid epoxy compound

The invention is a novel polymer optical waveguide which contains a thermoplastic aliphatic segmented polyurethane core.

Growing community of inventors

Walnut Creek, CA, United States of America

Theodore L Parker