초록 ▼

Curing catalysts comprising organo metallic compounds, and carboxylic acids or compounds convertible thereto, processes for their use and compositions containing them are disclosed. The compositions enable the control of the curing rate profile of hydroxy terminated polybutadiene based urethane prop

Curing catalysts comprising organo metallic compounds, and carboxylic acids or compounds convertible thereto, processes for their use and compositions containing them are disclosed. The compositions enable the control of the curing rate profile of hydroxy terminated polybutadiene based urethane propellant binders, and the cure rate profile of polyurethane resin systems generally.

대표청구항 ▼

A curable composition comprising a hydroxy terminated polybutadiene, a polyisocyanate and an effective amount of a cure catalyst therefor, said catalyst comprising a metallo organic compound of the formula MRm where M is an m-valent metal selected from bismuth, lead, tin, arsenic, zinc, copper, cadm

A curable composition comprising a hydroxy terminated polybutadiene, a polyisocyanate and an effective amount of a cure catalyst therefor, said catalyst comprising a metallo organic compound of the formula MRm where M is an m-valent metal selected from bismuth, lead, tin, arsenic, zinc, copper, cadmium or potassium and R is phenyl, tolyl, benzyl, naphthyl, alkyl of 1 to 20 carbon atoms or cycloalkyl of 5 to 20 carbon atoms and a carboxylic acid or a compound convertible to a carboxylic acid by reaction with Zerewitinoff active hydrogen.