Patent ID: 6346573
Filing Date: 2002-02-12
Classification: C08G,C08J

Abstract:
A method for the manufacture of a one-component, heat curable, thermosettable, epoxy resin system and its placement in a container, which method comprises mixing at 15-30Â° C.(A) an epoxy resin or compound containing more than one expoxy group; (B) an amine solidifying system present in insufficient quantities to cause gelation after all the amino hydrogen atoms are consumed by epoxy groups, under the reaction conditions chosen for (A) and (B), and which yields a product with a Kofler Heat Bank melting point of less than 55Â° C. and melting point stability of at least six months at normal workshop temperatures; in the presence of (C) a hardener system for (A) and the reaction product of (A) and (B) which is different from (B) and remains unreacted with (A) and (B) under the conditions of reaction chosen for (A) and (B); (E) an expanding agent; and optionally (D) additives other than expanding agent (E) which modify the physical properties of the cured or uncured composition, with the proviso that no tertiary amines are present in the initial mixture or generated during the reaction which react under the conditions chosen for (A) and (B), in such a way that (A) and (B) react to completion at room temperature over a period of between 2-14 days, provided that the reaction between (A) and (B) does not generate enough heat in the container to activate reaction between the remaining epoxy groups and hardener (C), or expanding agent (E).