Vianova Kunstharz A.g.

Vianova Resins Ag

Hans Hiden

Laszlo Tulacs

Werner Wilfinger

Johann Luttenberger

Process for the preparation of water-dilutable coating binders, and the

A process for the preparation of polymers by free-radical, bulk polymerization comprising charging a reaction vessel with from about 5 to 15 percent by weight of an alpha, beta-unsaturated monomer which does not, under the conditions of the reaction, undergo free-radical polymerization, e.g., an alkyl ester of fumaric or maleic acid; thereafter adding to the reaction vessel from about 95 to 85 percent by weight of an acrylic monomer which, under the conditions of the reaction, undergoes free-radical polymerization in bulk form, blended with a free-radical initiator and controlling said addition in order that the acrylic monomer is present in said reaction kettle in an amount of less than about 20 percent, and preferably less than about 5 percent, during the course of the reaction. The process proceeds without excessive exothermy, permitting the complete polymerization in a synthetic resin reactor.

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St. Margarethen/Raab, Austria

Hans Hiden