Prc De Soto International, Inc.

Products Research & Chemical

Lockheed Corporation

Ahmed Sharaby

Chandra B Rao

Jonathan D Zook

Susan E DeMoss

David W Jordan

Hakam Singh

Razmik Boghossian

Robert N Miller

Ponchivy Tan

Adducts and prepolymers comprising pendent alkyl groups are disclosed. Polythiol adducts prepared by reacting a polythiol with a ketone and urethane-extended polythiol adducts. The polythiol adducts can be terminated with isocyanate groups. Compositions comprising the isocyanate-terminated polythiol adducts, isocyanate-terminated sulfur-containing prepolymers, and diisocyanates can be combined with polyamine or polyepoxide curing agents to provide curable compositions. Cured compositions are suitable for aerospace coating and sealant applications. The compositions can also include a low specific gravity filler and, when cured, meet the requirements of aerospace sealant applications.

Urethane-modified prepolymers containing pendent alkyl groups, compositions and uses thereof

Embodiments of the present disclosure are directed to sealant compositions including a base composition with at least one sulfur-containing polymer, a curing agent composition, and an electrically conductive filler including carbon nanotubes and stainless steel fibers. The electrically conductive filler can be in either or both of the base composition and the curing agent composition. The sealant compositions are substantially Ni-free and exhibit unexpectedly superior EMI/RFI shielding effectiveness.

Conductive sealant compositions

Sealant and potting formulations are provided which are prepared from components including ungelled mercapto-terminated polymer(s) prepared by reacting reactants comprising polyvinyl ether monomer(s) and polythiol material(s); curing agent(s) reactive with a mercapto group of the mercapto-terminated polymer; and additive(s) selected from the group consisting of fillers, adhesion promoters, plasticizers and catalysts.

Sealants and potting formulations including mercapto-terminated polymers produced by the reaction of a polythiol and polyvinyl ether monomer

Sealant and potting formulations are provided which includes ungelled polymer(s) prepared from components including polyvinyl ether monomer(s) and polythiol material(s), the ungelled polymer being terminated with functional groups other than a thiol group; curing agent(s); and at least one additive selected from the group consisting of fillers, adhesion promoters, plasticizers and catalysts.

Sealants and potting formulations including polymers produced by the reaction of a polythiol and polyvinyl ether monomer

Elastomeric compositions having incorporated therein certain specific compounds and/or compositions which are non-toxic but render the metals to which the compositions are applied resistant to corrosion, particularly, when in a salt environment.

Non-toxic corrosion inhibitive compositions and methods therefor

A corrosion inhibiting coating composition for metals comprising a liquid polymer composition which contains a polymer which is capable of being cured to a solid elastomer such as polysulfide, polyurethane, polythioether or polyether and a water soluble ammonium salt of phosphoric acid, orthophosphorous acid or hypophosphorous acid.

Growing community of inventors

Canyon Country, CA, United States of America

Ahmed Sharaby