Abstract: Polyimide polymers of improved physical properties and thermal stability may be prepared by reacting an N,N'-bismaleimide with an activated methylene compound in a nonreactive organic solvent system. The polymers are useful in producing films, moldings, and laminates or other composites.

Abstract: Vinyl ester urethane resins prepared by reacting (a) the reaction product of a polyoxyalkylene bisphenol A and a polycarboxylic acid or anhydride, (b) a polyfunctional isocyanate, and (c) a monohydroxyl-terminated ester of acrylic acid are useful in coating compositions.

Abstract: Vinyl ester urethane resins prepared by reacting (a) the reaction product of a polyoxyalkylene bisphenol A and a polycarboxylic acid or anhydride, (b) a polyfunctional isocyanate having an average isocyanate functionality of greater than two, and (c) a monohydroxyl-terminated ester of acrylic acid or methacrylic acid are useful in thermosetting fiber reinforced laminates.

Abstract: Novel fluorinated sulfonamides useful as water-, oil- and soil repellency agents may be prepared by reacting a C.sub.12-30 fatty acid, polyamine and a sulfonyl halide in the presence of an organic or inorganic weak base.

Abstract: Substantially pure tetramethylbiphenol may be recovered from a reaction product obtained by the oxidative coupling of xylenol by vaporizing the reaction product and subliming substantially pure tetramethylbiphenol from the vapor.

Abstract: High molecular weight polyether-sulfones are prepared by reacting a 3,3',5,5'-tetraalkyl-4,4'-dihydroxybiphenyl with 4,4'-dihalodiphenyl sulfone and from about 0 to 30 percent stoichiometric excess of an alkali metal carbonate or bicarbonate compound in the presence of a dipolar aprotic solvent. The polyethersulfone polymers and products made therefrom possess low density and high glass transition temperatures while maintaining good solvent resistance and good tensile, flexural, and hardness properties.

Abstract: Carbon-carbon coupled self-condensation products obtained by the oxidative coupling of phenols and naphthols are prepared by contacting an aqueous mixture of phenol or naphthol with oxygen in the presence of sufficient alkaline material to sustain a pH in the range of 8.5-9.5 during the oxidative coupling reaction and a catalyst system comprising a copper, cobalt, nickel, iron, chromium, cerium, or manganese chelate of a polyimino acid containing more than two nitrogen atoms.

Abstract: Carbon-carbon coupled self-condensation products obtained by the oxidative coupling of alkylphenols are prepared by contacting an aqueous mixture of an alkyl phenol with oxygen in the presence of sufficient alkaline material to sustain a pH in the range of 9-9.5 during the oxidative coupling reaction and a catalyst system comprising a copper, cobalt, nickel, iron, chromium, cerium or manganese complex of a diimino acid. The mixture may optionally contain a surfactant.

Abstract: Tetravalent manganese precipitated on porous carbon provide useful oxidation catalysts. They may be prepared by slurrying potassium permanganate and porous carbon under alkaline conditions.

Abstract: Carbon-carbon coupled self-condensation products obtained by the oxidative coupling of alkylphenols or 1-naphthols are prepared by contacting an aqueous mixture of an alkylphenol or 1-naphthol with oxygen in the presence of sufficient alkaline material to sustain a pH in the range of 7.0-9.0 during the oxidative coupling reaction and a catalyst system comprising a cupric, cobaltous, manganous or chromic chelate of a thio-acid compound.The mixture may optionally contain a surfactant.

Abstract: Carbon-carbon coupled self-condensation products obtained by the oxidative coupling of alkylphenols are prepared by contacting an aqueous mixture of an alkyl phenol with oxygen in the presence of sufficient alkaline material to sustain a pH in the range of 8.5-9.5 during the oxidative coupling reaction and a catalyst system comprising certain imino acid chelates of Cu.sup.2, Ni.sup.2, Co.sup.2, Ce.sup.3, Cr.sup.3, Mn.sup.2 and Fe.sup.3. The mixture may optionally contain a surfactant.

Abstract: Carbon-carbon coupled self-condensation products obtained by the oxidative coupling of alkylphenols or 1-naphthols are prepared by contacting an aqueous mixture of an alkylphenol or 1-naphthol with oxygen in the presence of sufficient alkaline material to sustain a pH in the range of 7.0-9.5 during the oxidative coupling reaction and a catalyst system comprising a cupric, cobaltous or manganous chelate of a hydroxy- or keto- acid compound.The mixture may optionally contain a surfactant.

Abstract: Carbon-carbon coupled self-condensation products obtained by the oxidative coupling of alkylphenols or 1-naphthols are prepared by contacting an aqueous mixture of an alkyl phenol or 1-naphthol with oxygen in the presence of sufficient alkaline material to sustain a pH in the range of 7.0-9.5 during the oxidative coupling reaction and a catalyst system comprising a cupric or manganous chelate of a keto alcohol compound.The mixture may optionally contain a surfactant.

Abstract: Carbon-carbon coupled self-condensation products obtained by the oxidative coupling of alkylphenols or 1-naphthols are prepared by contacting an aqueous mixture of an alkylphenol or 1-naphthol with oxygen in the presence of sufficient alkaline material to sustain a pH in the range of 8.0-9.5 during the oxidative coupling reaction and a catalyst system comprising a cupric, cobaltous or manganous chelate of an oxime of a keto or aldehyde compound.The mixture may optionally contain a surfactant.

Abstract: Carbon-carbon coupled self-condensation products obtained by the oxidative coupling of alkylphenols or 1-naphthols are prepared by contacting an aqueous mixture of an alkylphenol or 1-naphtol with oxygen in the presence of sufficient alkaline material to sustain a pH in the range of 7.5-10 during the oxidative coupling reaction and a catalyst system comprising a cupric, cobaltous, nickelous, ferric, manganous or chromic chelate of an aminoketone compund.The mixture may optionally contain a surfactant.

Abstract: Carbon-carbon coupled self-condensation products obtained by the oxidative coupling of alkylphenols or 1-naphthols are prepared by contacting an aqueous mixture of an alkylphenol or 1-naphthol with oxygen in the presence of sufficient alkaline material to sustain a pH in the range of 8.5-9.5 during the oxidative coupling reaction and a catalyst system comprising a cupric chelate of a compound selected from the group consisting of quanidines, amides, salens, dihydrazides, triazenes, dihydroxy substituted aromatics, macrocylic polyamines and alpha, delta-polyketones.The mixture may optionally contain a surfactant.

Abstract: Tetravalent manganese precipitated on porous carbon is useful to catalyze oxidative coupling reactions of alkyl phenols.

Abstract: Carbon-carbon coupled self-condensation products obtained by the oxidative coupling of alkylphenols or 1-naphthols are prepared by contacting an aqueous mixture of an alkylphenol, alkoxyphenyl, or 1-naphthol with oxygen in the presence of sufficient alkaline material to sustain a pH in the range of 7.0-9.5 during the oxidative coupling reaction and a catalyst system comprising a cupric, cobaltous, manganous, nickelous, chromic or ferric chelate of a dicarboxylic acid compound.The mixture may optionally contain a surfactant.

Abstract: Carbon-carbon coupled self-condensation products obtained by the oxidative coupling of alkylphenols or 1-naphthols are prepared by contacting an aqueous mixture of an alkyl phenol or 1-naphthol with oxygen in the presence of sufficient alkaline material to sustain a pH in the range of 5-10 during the oxidative coupling reaction and a catalyst system comprising a cupric, cobaltous, manganous or chromic chelate of a beta- or gamma- diketone or keto ester.The mixture may optionally contain a surfactant.

Abstract: Carbon-carbon coupled self-condensation products obtained by the oxidative coupling of alkylphenols are prepared by contacting an aqueous mixture of an alkyl phenol with oxygen in the presence of sufficient alkaline material to sustain a pH in the range of 6-9.5 during the oxidative coupling reaction and a catalyst system comprising an ammonia complex of monovalent copper; divalent copper, cobalt, nickel or manganese; or trivalent chromium or iron. The mixture may optionally contain a surfactant.