General Electric Company

Union Carbide Corporation

Amoco Corporation

Herbert S Chao

Jana M Whalen

Carol Lynn Fasoldt

Geoffrey Henry Riding

Bradley R Karas

Louis M Maresca

James E Harris

Robert Edgar Colborn

Peter P Policastro

Douglas Duane Ward

Michael John Davis

James E Tracy

Charles Richard Evans

Stephen B Rimsa

James R Presley

David John Swanson

Joseph T Begovich, Jr

Edward F Chu

Bruce C Johnson

Donald Franklin Foust

John E Hallgren

Wendy Wen-Ling Lin

Wendy Wenling Lin

Steven Thomas Rice

Donald R Kelsey

Christian Lietzau

Thomas W Hovatter

Abbas Mohamad Safieddine

A thin film that forms an interface between metal surfaces and polymeric inserts of aircraft engine fan blades. The thin film is formed from a chemical comprised of carbon black, at least one evaporable solvent, a combination of phenolic-like resins dissolved in the solvent and the balance filler and inert ingredients. The thin film, upon drying of the evaporable solvent, forms a phenolic that bonds with the metallic portion of the fan blade. After the polymeric material is applied to recesses in the fan blade and cured, a chemical bond is formed between the thin film and the elastomeric inserts. The bonded structure has improved FWT peak stresses and improved fracture toughness.

Adhesion enhancers to promote bonds of improved strength between elastomers metals in lightweight aircraft fan blades

Elastomeric formulation used in the construction of lightweight aircraft engine fan blades

A composition and method for promoting improved adhesion between a thermoplastic resinous substrate and polyurethane foam is provided. In one aspect of this invention, the composition comprises a thermoplastic mixture of at least one polyphenylene ether and at least one poly(alkenylaromatic) compound; and at least one primary amine-containing material or secondary amine-containing material.

Composition and method for enhancing the surface adhesion of

The invention provides a composition for a platable resinous substrate having enhanced heat performance comprising: a thermoplastic mixture of at least one polyphenylene ether and at least one poly(alkenylaromatic) compound, at least one rubber compound, and at least one inorganic filler material.

Composition and method for improved heat performance in a polyphenylene

A method improves the adhesion of polyurethane foam to polycarbonate by providing reactive groups on the polycarbonate surface. The adhesion is further improved by utilizing a polyurethane mix with an isocyanate index greater than 82. Articles comprising polycarbonate and polyurethane foam adhered to the polycarbonate by the method of the instant invention, such as automobile dashboards, are also provided.

Method of improving adhesion of polyurethane foam to polycarbonate and

The adhesion of metal coatings deposited by electroless deposition on polycarbonate-addition polymer substrates, especially polycarbonate-ABS substrates, is improved by first contacting the substrate with an alkali metal hydroxide solution followed by concentrated nitric acid.

Adhesion of electroless coating to resinous articles

Substrates comprising blends of at least one polyphenylene ether and at least one poly(alkenylaromatic compound) (e.g., polystyrene) are treated with aqueous tetravalent cerium in a concentration of at least about 0.1 M, preferably acidified with nitric acid, to improve adhesion to metal coatings subsequently deposited nonelectrolytically; for example, by electroless deposition. The metallized articles are heat treated following metal deposition. Further metal coatings may be deposited, preferably followed by further heat treatment.

Method for adhering metal coatings to polyphenylene ether-polystyrene

Increases in surface resistivity of electroless nickel coatings on polycarbonate-containing substrates are inhibited by employing two electroless nickel plating solutions. The first solution is one which deposits a metal layer containing phosphorus, if any, in an amount up to 5% by weight and is used to deposit a layer at least 0.5 micron thick. The second solution is one which deposits a layer containing phosphorus in the amount of at least 5% and preferably at least 6% by weight. Another metal layer may be interposed between the two nickel layers.

Preparation of electroless nickel coating having improved properties

Addition polymer substrates comprising structural groups derived from olefinic nitriles and conjugated dienes, especially ABS resin substrates, are treated with aqueous tetravalent cerium in a concentration of at least about 0.1 M, preferably with a tetravalent cerium solution, to improve adhesion to metal coatings subsequently deposited non-electrolytically; for example, by electroless deposition. The metallized articles are heat treated following metal deposition. Further metal coatings may be deposited, preferably followed by further heat treatment.

Method for adhering metal coatings to thermoplastic addition polymers

Cyanate ester polymer articles, particularly fiber-reinforced, are metallized by electroless deposition preceded by a series of pretreatment steps which improve adhesion of the metal layer or layers. Said steps include aqueous alkali followed by nitric acid treatment. They preferably also include an initial alkaline permanganate treatment, preferably preceded by aqueous alkali.

Method for providing adherent metal coatings on cyanate ester polymer

The adhesion of metal coatings, such as those produced by electroless or physical vapor deposition, on polypyromellitimide surfaces is improved by prior treatment of the surface with concentrated sulfuric acid, followed by aqueous alkali metal hydroxide of at least about 2M concentration. Further metal may be deposited on the surface, for example by electrolytic or physical vapor deposition, following the original metal deposition.

Adhesion of metal coatings of polypyromellitimides

The adhesion of metal coatings deposited by electroless deposition on polycarbonate-addition polymer substrates, especially polycarbonate-ABS substrates, containing up to about 85% (by weight) polycarbonate is improved by first contacting the substrate with an alkali metal hydroxide solution for about 1-2 minutes, followed by an alkaline permanganate solution and a reducing agent to remove any manganese residue.

Adhesion of electroless coatings to resinous articles by treatment with

Curable compositions contain a low molecular weight polyphenylene ether and a polyepoxide composition containing brominated and non-brominated bisphenol polyglycidyl ethers, in combination with further components including specific catalysts. Said compositions are preferably free from hardeners for epoxy resins. They may be used in the preparation of bonding sheets which are useful in the manufacture of multilayer printed circuit assemblies and which have excellent physical and electrical properties.

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Schenectady, NY, United States of America

Herbert S Chao