Chemische Werke Huls Aktiengesellschaft

Veba-chemie Aktiengesellschaft

Volker W Kulisch

Felix Schulde

Johann Obendorf

Klaus M Diedrich

Karl Peterlein

A paper sizing composition which comprises a mixture of

Paper sizing agents

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.

Anionic paper surface sizing agent

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.2, nitro groups, keto groups, ester groups or carbonamide groups, and R represents alkyl, alkylene, an aryl, aralkyl, cycloalkyl or heterocyclic radical, substituted if desired with halogen, nitro groups, alkyl groups, alkoxy groups or amino groups, and, when m equals 1, represents also hydrogen, a plurality of radicals being able to be joined, also by hetero atoms such as O, N or S, if desired.

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Gladbeck, Germany

Volker W Kulisch