Abstract: The invention relates to polymer mixtures which comprise a polybutylene terephthalate, a thermoplastic elastomer, and a brominated polystyrene. The polymer mixtures according to the invention have a combination of the following favorable properties: a good flexibility, a good flow of the melt, good flame-retarding properties and a high tracking index.

Abstract: This invention relates to thermoplastic molding compositions, particularly thermoplastic polyesters, having incorporated therein a fluorinated polyolefin to improve wear resistance. More particularly, disclosed are polyester compositions having improved wear resistant good properties comprising a polyester resin, most preferably a poly(butylene terephalate) resin; a fluorinated polyolefin compound and a hindered phenolic compound and an ester compound, the last two components serving as a migrator package that serves to push a disproportionate amount of the fluorinated polyolefin within the subsurface of the resulting composition to thereby augment the wear resistant effect of the fluorinated polyolefin.

Abstract: A process for the preparation of nitrophthalic acid by the nitration of phthalic acid and/or phthalic anhydride using only nitric acid, said nitric acid having a concentration of at least about 95% by weight, and then recovering the nitrophthalic acid formed from the nitric acid solution.

Abstract: Silphenylene groups are incorporated into epoxy-functional silicones to improve the physical properties of otherwise weak and brittle UV-cured epoxy-functional silicones without adding fillers and without sacrificing fast, efficient UV cure speed. Such compositions are useful as conformal coatings, optical fiber coatings, and electrical encapsulation.

Abstract: A transparent and fast curing composition suitable for use as a shatter-resistant coating on a glass, porcelain, or ceramic surface, wherein the composition comprises:(A). at least about 62 to about 71 parts by weight of a solid, benzene soluble resin copolymer consisting essentially of R.sub.3 SiO.sub.1/2 units and SiO.sub.4/2 units,(B). from about 29 to about 38 parts by weight of an essentially cyclic free, polydiorganosiloxane, the viscosity of the polydiorganosiloxane having a value of from about 500 to about 1,000,000 centipoises at 25.degree. C., the total of (A) and (B) being 100 parts by weight;(C). an organopolysiloxane having silicon bonded hydrogen atoms,(D). a platinum containing catalyst in sufficient quantity to provide at least 0.1 part by weight of platinum for every one million parts by weight of the combined weight of (a), (b), and (c).The composition forms a coating which is transparent, fast curing, and stable at elevated temperatures.

Abstract: Test method and apparatus for determining the presence of, the concentration of, or the absence of, immunologically-active substances in liquid media by measuring any change of electrical impedance of an electrode due to the presence of, or the absence of, the reaction of a product of enzyme linked immunologically-active substance and a proper enzyme substrate.

Abstract: An improved method for the preparation of cross-linked polycarbonates is disclosed, comprising the reaction at elevated temperature of a composition containing cyclic carbonate oligomers with at least one polyglycidyl acrylate copolymer formed by the reaction of at least one olefin with a glycidyl acrylate monomer. This invention also includes network polycarbonates wherein the carbonate chains are linked to each other via polyglycidyl acrylate copolymer groups. Further included within the scope of this invention are prepreg compositions which comprise a filler and a mixture of cyclic carbonate oligomers with a polyglycidyl acrylate copolymer.

Abstract: An improved silica-containing curable coating composition is described herein. The composition has an alkaline pH and contains a dialkyldialkoxysilane/alkyltrialkoxysilane mixture and a dispersion of ammonium-stabilized colloidal silica having an average particle size no greater than about 5-10 millimicrons. Methods for preparing such compositions are also disclosed, as are thermoplastic articles which include the cured protective coatings.

Abstract: Cyclic carbonate oligomers are stabilized according to the present invention by admixing a composition containing cyclic carbonate oligomers with an amount of an organic phosphite sufficient to substantially prevent premature polymerization of the oligomers.

Abstract: The ends of a plurality of copper conductors bearing superconductive strands, for example of niobium-titanium, are treated with a liquid metal solvent to selectively remove the copper from the superconductive strands. The liberated strands of superconductor are then soldered with a superconducting solder. The joint is included in a coil which at superconducting temperatures induces a high magnetic field of 0.5 Tesla and above.

Abstract: Thermoplastic branched polycarbonate resins are prepared by equilibration of linear aromatic polycarbonate with polyhydric phenol having more than two hydroxy groups in the presence of a catalyst.

Abstract: A method is provided for the production of optically active (S)-(-)- and (R)-(+)-binaphthol and catalyzed asymmetric hydrolysis of corresponding racemic (R,S)-(.+-.)-binaphthol an (R,S)(.+-.)-spirobiindanol diesters.

Abstract: Improved copper conductor inks useful in fabricating multilevel circuits are provided. The inks comprise copper powder, a devitrifying glass frit which does not begin to flow until the furnace temperature is above about 700.degree. C., and a suitable organic vehicle. Devitrifying glass frits with these properties include a zinc-calcium-aluminum-silicate glass frit, a zinc-magnesium-barium-aluminum-silicate glass frit, a zinc-magnesium-barium-aluminum-zirconium-phosphosilicate glass frit and mixtures thereof. The inks are advantageous in that they form copper conductor layers having excellent properties without the inclusion of traditional flux materials such as bismuth oxide.

Abstract: An aqueous electroless gold plating composition is disclosed comprising a water-soluble alkali metal monovalent gold cyanide complex, a water-soluble alkali metal complexing agent and hydrazine or its derivatives. A method for electrolessly plating gold onto a nickel substrate is also disclosed.

Abstract: The thermal stability of cyclic carbonate oligomers may be increased by treating a solution of the oligomers with an effective amount of a hydrogen halide.