Rutgerswerke Aktiengesellschaft

Ralf Wetzig

Arno Gardziella

Peter Adolphs

Alois Kwasniok

A granular molding material with a binder comprising a phenol novolac and a polyisocyanate which hardens upon addition of amine catalysts wherein the molar ratio of phenol to formaldehyde in the novolac is 1:0.25 to 1:0.5 and has the formula ##STR1## wherein R, R' and R' are individually selected from the group consisting of hydrogen, alkyl of 1 to 12 carbon atoms, hydroxy, cycloalkyl of 3 to 12 carbon atoms and an anellated ring and X is an integer from 0 to 4 or &gt;4 with the percent molar distribution based on X is as follows:

Growing community of inventors

Iserlohn, Germany

Ralf Wetzig