Urea derivatives and use as polyurethane catalysts

摘要

Covers compounds of the formula: <IMAGE> where R and R1, when taken individually are lower alkyl or when taken together represent <IMAGE> z is an integer of 2-6 and X is O or N-R2 where R2 is lower alkyl. Also covers a method of producing a polyurethane by utilizing said above compound as a catalyst in reacting an organic polyisocyanate with an organic polyester polyol or polyether in the presence of said catalyst.