Abstract: A process for the preparation of a dicyclopentenol ester of the formula: ##STR1## wherein R is a C.sub.1-12 alkyl group, a C.sub.6-12 aryl group or a C.sub.6-12 substituted aryl group is disclosed. In this process dicyclopentadiene is reacted with an organic carboxylic acid of the formula:R--CO--OHin the presence of a catalyst. The catalyst comprises a readily volatile addition compound of BF.sub.3.

Abstract: A process for the production of maleic anhydride by catalytic air oxidation of hydrocarbons capable of being so oxidized at a temperature in the range of 300.degree.-450.degree. C.

Abstract: A process for the recovery of five-membered ring dicarboxylic acid anhydrides from aqueous solutions of the corresponding dicarboxylic acids which entails (a) washing the aqueous solution of the dicarboxylic acid with a water-insoluble tertiary amine, and separating the resulting amine-acid salt from the water layer; and (b) adding an aromatic hydrocarbon entrainer for the water, removing the entrainer/water azeotrope by distillation and separating the five-membered ring dicarboxylic acid anhydride after phase separation; or adding an aliphatic hydrocarbon entrainer for the water, removing a ternary azeotropic mixture consisting of a hydrolytically stable anhydride, water and entrainer by distillation and separating the five-membered ring dicarboxylic acid anhydride after phase separation.

Abstract: The invention relates to a process for removing naphthoquinone from phthalic anhydride produced by the air oxidation of naphthalene or mixtures containing naphthalene. Specifically, crude phthalic anhydride containing naphthoquinone is treated at a temperature of 180.degree.-280.degree. C. with an unsaturated aliphatic oil produced by the polymerization of 1,3-dienes and optionally isomerized having a molecular weight of 800-5,000, and optionally in the presence of 1-40 ppm of alkali ions, relative to the crude phthalic anhydride.

Abstract: The object of the invention is a process for the production of flat varnishes based on powder coatings of 1,2-epoxy compounds with at least one 1,2-epoxy group in the molecule and a lower melting point of >40.degree. C., salts of aromatic carboxylic acids with 3 and more carboxyl groups and imidazolines as curing agents, as well as the usual additives and the application of the powdered varnish upon the objects to be varnished and heating of these objects to temperatures of 160.degree.-240.degree. C., whereby the salt of 2-phenyl-methyl-.DELTA.2-imidazoline and trimellitic acid is substituted up to 60 mole % by a salt of 2-phenyl-.DELTA.2-imidazoline and trimellitic acid.

Abstract: Terpolymers of maleic anhydride, dicyclopentadiene, and a vinylcyclohexene, preferably 1-vinylcyclohexene-3, are highly effective paper sizing materials.

Abstract: A polyamide copolymer, useful as a melt adhesive especially for textiles, produced from the following monomers1. An unbranched aliphatic dicarboxylic acid with 6-20 C-atoms;2. A diamine mixture consisting of(a) 20-80 mol percent, unbranched aliphatic diamines with 6-20 C-atoms; and(b) 80-20 mol percent branched aliphatic and/or cycloaliphatic diamines;said copolymer having a molecular weight of 2000-40000.

Abstract: A polyamide copolymer, useful as a melt adhesive especially for textiles, produced from the following monomers1. An unbranched aliphatic dicarboxylic acid with 6-20 C-atoms;2. A diamine mixture consisting of(a) 20-80 mol percent, unbranched aliphatic diamines with 6-20 C-atoms; and(b) 80-20 mol percent branched aliphatic and/or cycloaliphatic diamines;said copolymer having a molecular weight of 2000-40000.

Abstract: Molding method and polyadducts for molding objects and coatings from 1,2-epoxy compounds having more than one epoxy group in the molecule and ureas having the formula: ##STR1## wherein N .gtoreq. 1,R' is an alkylene or arylene radical,R" is hydrogen and at least one radical from the group of ##STR2## THE GROUP ##STR3## R'" being the same or different radical from the group of hydrogen and alkyl, X being an R'"OOC--, R'".sub.2 NOC-- or NC-- radical and R"" being alkyl or aryl.