Abstract: A novel process is disclosed for the preparation of 4-hydroxyacetopheone oxime by reaction of 4-hydroxyacetophenone with a hydroxylamine in caustic wherein the mother liquor obtained after crystallization of the oxime together with the wash water is recycled back and reused. This invention illustrates the criticality of maintaining the reactants in certain critical mol ratios in order to obtain 4-hydroxyacetopheone oxime of acceptable color.

Abstract: Complex metal oxides are formed by calcining in molecular oxygen such as air at least one bimetallic complex of the formula A[BY] wherein A and B are metals and Y is a ligand associated with B. The bimetallic complexes are precipitated from aqueous solution by a transposition reaction of AX and M[BY] wherein X is a disassociable anion and M is a cationic species. The bimetallic complexes are useful in forming pure complex metal oxide fibers by a process of either dispersing the complex metal oxide or bimetallic precursors in a spinning composition of fluid organic polymer or by imbibing a polymeric fiber with species AX and precipitating out the bimetallic complex by treating the imbibed fiber with a compound containing the BY complex. The process is also useful in forming superconductive complex metal oxides.

Abstract: A polyacetal resin composition for use in producing molded articles of low gloss comprises the polyacetal and an aluminosilicate fiber.

Abstract: In one embodiment this invention provides a high performance nonlinear optical medium which comprises a transparent organic polymer film containing an array of charge asymmetric molecules such as 13,13-diamino-14,14-dicyanodiphenoquinodimethane: ##STR1##

Abstract: Complex metal oxides are formed by calcining in molecular oxygen such as air at least one bimetallic complex of the formula A[BY] wherein A and B are metals and Y is a ligand associated with B. The bimetallic complexes are precipitated from aqueous solution by a transposition reaction of AX and M[BY] wherein X is a disassociable anion and M is a cationic species. The bimetallic complexes are useful in forming pure complex metal oxide fibers by a process of either dispersing the complex metal oxide or bimetallic precursors in a spinning composition of fluid organic polymer or by imbibing a polymeric fiber with species AX and precipitating out the bimetallic complex by treating the imbibed fiber with a compound containing the BY complex. The process is also useful in forming superconductive complex metal oxides.

Abstract: This invention provides novel side chain polymers which exhibit nonlinear optical response, and which have utility as a transparent optical component in all-optical and electrooptical light switch and light modulator devices.

Abstract: A hydrophone device is provided with a piezoelectric ceramic-polymer composite of 0-3 connectivity in which the piezoelectric filler comprises a solid solution of PBTiO.sub.3 -BiFeO.sub.3 wherein the solid solution contains 50-80 wt. % of the BiFeO.sub.3. The piezoelectric ceramic-polymer composite has large hydrostatic piezoelectric charge and voltage coefficients which are desirable in hydrophone devices.

Abstract: An aqueous sulfuric acid anolyte solution is circulated through the anode compartment of an electrolytic cell, and an aqueous NaHSO.sub.3 catholyte solution is circulated through its cathode compartment, while maintaining an anolyte and catholyte temperature range of 20.degree.-25.degree. C., a catholyte pH range of 4.6 to 5.8, and a reduction potential of -1.25 to -1.50 V versus Ag.degree./AgCl, to produce an aqueous solution of Na.sub.2 S.sub.2 O.sub.4. Optimum pH is maintained by small additions of an alkali to the catholyte solution for electrolysis and solution stability.

Abstract: There is disclosed a method for the production of dust-free sodium dithionite from the reaction of a alkaline formate sulfur dioxide and an alkaline metal agent in the presence of a thiosulfate reactive compound by introducing a water-soluble polymer having a molecular weight less than 60,000 and delaying the start of the alkaline metal agent until the sodium formate and the sulfur dioxide have begun to be introduced into the reactor.

Abstract: In one embodiment this invention provides a novel polymerizable quaternary ammonium carbonate corresponding to the formula: ##STR1## In another embodiment this invention provides a novel copolymer of the above represented methacrylamidopropyltrimethylammonium methyl carbonate and acrylamide, which exhibits a high level clay flocculation efficiency.

Abstract: Stripper compositions for coatings comprise trioxane. An aromatic hydrocarbon and aliphatic alcohol can be added to improve solubility parameters. Xylene and methanol are the preferred co-solvents.

Abstract: In one embodiment this invention provides a parametric frequency converting device which comprises a thin film of a polymeric medium which exhibits second order nonlinear optical response, and the device has heat control means for temperature tuning of the waveguide medium to phase match the propagation constants of fundamental and second harmonic light beams. In a preferred device the waveguiding medium has a spatial periodic structure for quasi-phase matching of the propagating wave energy, and optionally has a set of electrodes for application of a direct current electric field to the waveguiding medium.

Abstract: This invention provides novel bisacrylate monomers and thermoset polymers which exhibit nonlinear optical response. The polymers have utility as a transparent nonlinear optical component in optical light switch and light modulator devices.

Abstract: This invention provides novel side chain liquid crystalline polymers which exhibit nonlinear optical response, and which have utility as a transparent optical component in electrooptic light modulator devices.

Abstract: Polyarylene sulfide molding compositions are provided with improved mold release properties by the inclusion of an internal lubricant comprising pentaerythritol tetrastearate.

Abstract: Polyarylates formed by reacting the diester of a dihydric phenol such as bisphenol-A and at least one aromatic dicarboxylic acid in the presence of an esterification catalyst is provided with improved color by the addition of cobalt during polymerization. The amount of cobalt can be reduced and an additional amount of an ultramarine blue pigment can be added to the reaction mixture to maintain the color improvement.

Abstract: This invention relates to imparting gray, blue, or purple tints to aromatic copolyester compounds. This is accomplished through the addition of a cobalt-containing compound such as cobalt carbonate, cobalt acetate, cobalt benzoate, or cobalt phenate to the polyester forming reaction system.

Abstract: Improved polyarylate color is achieved by dissolving in the polyarylate-forming reaction mixture a cobalt salt of an ester of a C.sub.3 to C.sub.20 aliphatic or iso-aliphatic hydrocarbon. The cobalt salt is preferably predissolved prior to addition to the reaction mixture.

Abstract: In a preferred embodiment this invention provides a second order nonlinear optical film medium which consists of a thermoplastic copolymer which has a crystallographic molecular alignment, and a net dipolar molecular orientation normal to the film plane. The crystallographic molecular alignment is formed by axial mechanical stressing, and the dipolar molecular orientation is induced by an electric or magnetic field.

Abstract: Silicon carbide whiskers such as those used in reinforcing ceramic composites are deagglomerated by dispersing the whiskers in an aqueous silane dispersant comprising a silane containing nonreactive hydrocarbon groups and reactive hydrolyzable groups, a cationic lubricant and an acid to provide a dispersant pH of about 3.5 to about 6.0. The whiskers can be deagglomerated prior to mixing with the ceramic powder used to form the composite or the whiskers, ceramic powder and aqueous silane dispersant can be mixed simultaneously. Dispersal permits classification and selection of specific aspect ratio distributions for the ceramic composite. Deagglomeration permits use of higher vol. % SiC whiskers while still attaining greater than 99% density.