Westinghouse Electric Corporation

USA As Represented by Secretary of the Navy

The United States of America As Represented by the Department of Health

Timothy J Fuller

William M Alvino

Luciano C Scala

Harry R Allcock

Thomas L Evans

Zal N Sanjana

Joseph R Marchetti

Louis A Cargnel

Martin P Seidel

Kiyotoshi Matsumura

Disclosed in an emulsion having a discontinuous phase that consists of a water dispersed or water emulsified epoxy resin in water having at least two epoxide groups, a water soluble salt of an imide compound having at least one carboxyl group, and a crosslinking agent; the discontinuous phase has excess epoxide functionality. The continuous phase is water. A method of forming a coating on a conductive substrate is also disclosed. The substrate and an electrode are immersed into the emulsion and a direct current is applied between the substrate and the electrode to electrophoretically deposit a coating on the substrate of the epoxy resin, the imide compound, and the crosslinking agent. The substrate is removed from the emulsion and is heated to a temperature sufficient to cure the coating.

Polyimide modified epoxy resins in aqueous emulsions for lamination and

Disclosed is a method of making a laminate by electrophoretically coating a flat mat made from a material selected from graphite, carbon, and mixtures thereof with an electrophoretable polymer in a non-aqueous system. The polymer is cured and the mat is impregnated with a thermosetable impregnating resin. The impregnating resin is B-staged to form a prepreg and several prepregs are stacked and cured under heat and pressure to form the laminate. Also disclosed is a laminate made by this method.

Reinforced composites made by electro-phoretically coating graphite or

Disclosed is a method of electrophoretically depositing a coating of polysulfones or polyethersulfones on a conductive substrate. An amine-free solution is formed in an organic solvent of the polysulfones or polyethersulfones. An emulsion is formed by combining the solution with an organic non-solvent for the polymer which contains up to about 0.6 parts by weight of an organic nitrogen containing base per parts by weight of the polymer. A direct current is applied between a conductive substrate and the emulsion which results in the deposition of the polymer on the substrate.

Electrophoretic deposition of sulfone-containing polymers

Disclosed is an electrodepositable emulsion which comprises a soluble un-ionized polymer containing an amic acid or amide linking group, a non-electrolyzable organic solvent for the polymer and a non-electrolyzable organic non-solvent for the polymer. The weight ratio of the solvent to the non-solvent is about 0.1 to about 0.5 and the polymer is about 0.4 to about 5% by weight of the weight of the solvent. No amine or surface active agent is used. A workpiece is coated with the polymer by placing it into the emulsion about one-half to about two inches away from the cathode. Constant dc voltage is applied between the cathode and the workpiece until a coating of a desired thickness has been deposited on the workpiece. The workpiece is then removed, dried, and cured.

Amine-free and surfactant-free electrodeposition of polyesters, polyamic

A resin containing laminate is made, where the resin comprises the cured admixture of phenolic resin, sulfur containing lignin, and a catalytic reactant containing 50 wt. % to 100 wt. % of an alkaline-earth compound and 0 wt. % to 50 wt. % of an alkali-metal compound.

Sulfur containing lignin modified alkaline earth treated phenolic

Disclosed is a method of making a non-aqueous emulsion from which a polymer can be electrodeposited. A mixture is prepared of about 50 to about 150 parts by weight of a non-aqueous organic, non-electrolizable, non-solvent for the polymer with about 0.8 to about 1.2 parts by weight of a nitrogen-containing base which can be a tertiary amine, an imidazole, or mixture of a tertiary amine and an imidazole. To the mixture is added a solution of 1 part by weight of the polymer which can be a polyamic acid, a polyamide imide, a polyimide, a polyparabanic acid, a polysulfone, or a mixture of these polymers. The polymer is in a non-aqueous, organic, non-electrolizable aprotic solvent such as N-methyl-2-pyrrolidone.

Method of preparing electrophorettable polymer emulsions

Synthesis of new (lithiophenoxy)phosphazene high polymers is described whin polymers such as poly(dichlorophosphazene) are used as the starting material to prepare poly(organophosphazenes) by reaction thereof with sodium para-bromophenoxide. Poly(organophophazenes) thus obtained are used in a metal-halogen exchange reaction with n-butyllithium. The lithio derivatives thus obtained are used as reactive intermediates for the synthesis of polymers of formulas [NP(OC.sub.6 H.sub.4 X-p).sub.x (OC.sub.6 H.sub.4 Br)y].sub.n and [NP(OC.sub.6 H.sub.4 Li-p).sub.x (OPh).sub.y ].sub.n, where X is PPh.sub.2, PPh.sub.2 C.sub.4 H.sub.9.sup.+ Br.sup.-, SnPh.sub.3, AuPPh.sub.3, or COOH.

Phosphorous containing polymers as carriers for transition metals

Steroidal cyclotriphosphazenes of the formula ##STR1## wherein R is the residue of a 3- or 17-hydroxysteroid and R.sub.2 is alkyl, are hydrolytically labile compounds adapted for slow release in vivo of active steroidal compounds of the formula ROH.

Growing community of inventors

Pittsburgh, PA, United States of America

Timothy J Fuller