PROTONATED AMINES FOR CONTROLLED CROSSLINKING OF LATEX POLYMERS

摘要

THE LATEX POLYMER COMPOSITIONS OF THE PRESENT INVENTION EXHIBIT LATENT CROSSLINKING PROPERTIES. LATENT CROSSLINKING IN THE POLYMERS TAKES ADVANTAGE OF THE FAST REACTION THAT OCCURS BETWEEN AMINE-REACTIVE CARBONYL GROUPS IN THE POLYMER COMPONENT AND CARBONYL-REACTIVE AMINE NITROGENS IN THE CROSSLINKING COMPONENT, BUT CONTROLS THE RATE OF CROSSLINKING BY PROTONATING THE AMINES WITH A VOLATILE ACID. ONCE THE LATEX IS COATED ONTO A SUBSTRAT, THE VOLATILE ACID EVAPORATES AND THE CARBONYL REACTIVE AMINE NITROGENS REACT WITH THE AMINE REACTIVE CARBONYL GROUPS TO FROM A CROSSLINKED COATING.