CONTINUOUS METHOD FOR MANUFACTURING AN ACID FUNCTIONAL BLOCKED SOLID ISOCYANATE

A continuous process for making an acid functional blocked Isocyanate. The process includes continuously feeding and mixing a) one or more polyisocyanates; b) one or more hydroxycarboxylic acids; and c) one or more other isocyanate blocking agent; in a reactor at from 100-240 DEG C. The method provides acid functional blocked Isocyanates useful as crosslinkers for powder coatings. Un procedimiento continuo para preparar un isocianato bloqueado acido-funcional. El procedimiento incluye la alimentacion y mezcla continuas de a) uno o mas poliisocianatos, b) uno o mas acidos hidroxicarboxilicos y c) uno o mas agentes bloqueantes de isocianato diferentes en un reactor a 100-240 degree C. El metodo proporciona isocianatos bloqueados acido-funcionales utiles como entrecruzantes para revestimiento en polvo.