A curing agent composition for adhesives based on urea - formaldehyde resins; a method for the production and set of this composition containing.

摘要

The hardening composition for glues of the urea-formaldehyde type comprises an aqueous solution of an ammonium salt as polymerization catalyst for the urea-formaldehyde resin and, in emulsion with said aqueous solution, a resin deriving from the polymerization of one or more vinyl alcohol esters either with each other or with other monomers containing the vinyl group, said resin being able to cross-link in acidic surrounding. The composition can further comprise other ingredients, such as an antifoaming agent, a metal salt having acidic reactivity which catalyzes the crosslinking of the vinyl resin, an inorganic filler, and urea which controls the catalytic activity of the ammonium salt.