Chemische Werke Huls Aktiengesellschaft

Karl Peterlein

Felix Schulde

Klaus M Diedrich

Volker W Kulisch

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.

Copolymers containing hydroxyl groups, method of production and their

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.

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Gladbeck, Germany

Karl Peterlein