Abstract: The low modulus polyimide adhesive compositions of the present invention contain a low modulus polyimidosiloxane polymer, a thermosetting substantially-non-halogenated epoxy (optionally including an epoxy catalyst), a plasticizer, an insoluble halogen-free flame-retardant filler, and optionally an adhesion promoter. The adhesive can be applied upon (or incorporated into) flexible circuits using a relatively low lamination temperature, generally no higher than 200, 190, 180, 175, 170, 165, 160, 155, or 150° C. The adhesive is generally resistant to unwanted curl even in cases where the adhesive polyimide and the base film polyimide have a coefficient of linear thermal expansions (measured between 50° C. and 250° C.) that differ by more than 10, 15, 20 25, or 30 ppm/° C.

Abstract: Flame retardant polymer compositions, especially ionomer polymer compositions, are prepared using ethylene diamine phosphate and used as surface coverings and building materials.

Abstract: This invention relates to flame retardants for polyester and polyamide compositions, and specifically relates to compositions containing (1) about 30 to about 70 weight percent of a polyester or a synthetic, aliphatic polyamide; (2) about 15 to about 40 weight percent of glass or mineral reinforcing agent; and (3) a flame retardant of (a) about 20 to about 30 weight percent of melamine phosphate and up to about 10 weight percent of a charring catalyst; (b) about 15 to about 30 weight percent of melamine phosphate, up to about 10 weight percent of a charring catalyst and up to about 10 weight percent of a char former; (c) about 25 to about 30 weight percent of melamine pyrophosphate; (d) about 15 to about 30 weight percent of melamine pyrophosphate and up to about 10 weight percent of a charring catalyst; or (e) about 15 to about 30 weight percent of melamine pyrophosphate, up to about 10 weight percent of a charring catalyst and up to about 10 weight percent of a char former, wherein all percents by weight ar

Abstract: Compositions of poly(methyl methacrylate) containing alumina trihydrate particularly useful as sheets or other shaped parts in architectural applications such as countertops or wall facings, having improved fire resistance by adding thereto minor amounts of chopped aramid and/or chopped carbon fibers are disclosed.

Abstract: A method for improving the resolution of an electron resist pattern on a substrate coated with a polymeric electron resist film is disclosed which provides an external coating layer of dried polymer selected from the group consisting of water-soluble polymers and poly(m-phenylene isophthalamide), or of a mixture consisting essentially of said dried polymer and hexavalent tungsten compounds wherein the weight ratio of the tungsten compounds to polymer is up to about 1:1. Also disclosed are substrates coated with a polymeric resist film wherein the resist film consists essentially of such external layers, or wherein an external coating layer of said polymer-tungsten compound mixture is provided.

Abstract: Aramid and polybenzimidazole fibers and films of improved flame resistance are obtained by impregnation with tungsten hexachloride.

Abstract: Novel catalysts for polyester production by esterification and/or transesterification are MoS.sub.2 or WS.sub.2 which have been intercalated by alkali metals cations, especially lithium cations, and then contacted with an alcohol or a polyol, a preferred polyol being a glycol which is one of the monomeric units in the polyester produced.

Abstract: Disclosed herein is a process for reducing the flammability of aramids by contacting a solvent swollen or never dried aramid with an aqueous solution of a tungsten compound, removing the solvent from, and then drying the aramid. The resulting aramids have superior Limiting Oxygen Indices, making them particularly useful where lower flammability is desired, as in firefighters' overcoats.

Abstract: Aramid and polybenzimidazole fibers and films of improved flame resistance are obtained by impregnation with tungsten hexachloride.

Abstract: The disclosed invention relates to novel aromatic polyamide compositions with a fullerene component and fibers therefrom which have improved torsional strength and a process for preparing said fibers.

Abstract: The disclosed invention relates to novel aromatic polyamide compositions with a fullerene component and fibers therefrom which have improved torsional strength and a process for preparing said fibers.

Abstract: This invention relates to a process for improving the properties of metal oxide superconductors said process comprising deposition an alkali metal layer having a thickness of less than about three monolayers onto the surface of an oxide superconductor by evaporation.