Abstract: A copolymer derived from maleic anhydride and dicyclopentadiene, containing hydroxyl groups, having the formula: ##STR1## wherein R and R' may be the same or different, selected from the group consisting of H, C.sub.1 -C.sub.14 alkyl-isobutyronitrile, phenyl which is optionally substituted by halogen, C.sub.1 -C.sub.8 alkyl-substituted phenyl, C.sub.1 -C.sub.14 alkoxy-, C.sub.1 -C.sub.14 acyloxy- or halogen-substituted benzoyl, and n=3-10. The copolymer is useful for the sizing of paper.

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

Abstract: An improvement for producing a coating from a powder lacquers composition comprising at least one 1,2-epoxide compound having at least one 1,2-epoxide group in the molecule which compound has a lower melting point greater than 40.degree. C.

Abstract: A paper sizing composition which comprises a mixture ofA. An alkaline aqueous dispersion of acid-group containing aliphatic hydrocarbon resins prepared by polymerizing a C.sub.4 - cut or a C.sub.5 - cut or mixtures thereof, obtained during thermal cracking of a hydrocarbon stream and modifying the product by addition thereto of an unsaturated polycarboxylic acid anhydride, wherein the resins have an acid number between 10 and 130 and are present in the dispersion with a solids content of 10-70%; andB. An alkaline solution of a copolymer of an .alpha., .beta.-unsaturated polycarboxylic acid and a C.sub.5 -.alpha.-olefin, wherein the solution has a solids content of 5-50% by weight; andwherein A and B are employed in a ratio of 91:1 to 1:99 relative to the solids content.

Abstract: Paper surface sizing agents based on aqueous solutions ofcopolymers of maleic acid anhydride and dicyclopentadiene, which are further reacted after preparation to produce the half amides with ammonia, or primary or secondary aliphatic amines.

Abstract: A method of producing coatings on the basis of two-component systems composed of 1,2-epoxy compounds having at least one 1,2-epoxy group in the molecule, plus cyclic amidines and the conventional paint additives, which are thermosetting at 100.degree. to 200.degree. C, the said method being characterized in that one uses as cyclic amidines imidazoline or tetrahydropyrimidine derivatives of the general formula ##STR1## IN WHICH N EQUALS 2 OR 3; M EQUALS 1 OR 2; R.sub.1, R.sub.2 and R.sub.3 are identical or different, and represent hydrogen, alkyl, aryl, aralkyl, cycloalkyl, heterocyclics, ether, theoether, halogen, --N(R).sub.

Abstract: Coatings having a matt finish are made by applying a powder varnish composition to a substrate and thereafter reacting the varnish at a temperature of 100.degree. to 240.degree. C to form the matt finish coating. The powder varnish composition is a finely divided, particulate mixture ofI. a 1,2-epoxy compound having a melting point greater than 40.degree. C and containing at least one 1,2-epoxy group; andIi. a salt of a polycarboxylic acid (such as pyromellite acid) containing three or more carboxyl groups and a cyclic amidine (such as 2-phenylimidazoline).

Abstract: Coatings having a matt finish are made by applying a powder varnish composition to a substrate and thereafter reacting the varnish at a temperature of 100.degree. to 240.degree.C to form the matt finish coating. The powder varnish composition is a finely divided, particulate mixture ofI. a 1,2-epoxy compound having a melting point greater than 40.degree.C and containing at least one 1,2-epoxy group; andIi. a salt of a polycarboxylic acid (such as pyromellitic acid) containing three or more carboxyl groups and a cyclic amidine (such as 2-phenylimidazoline).