Production of elastic, compact or cellular molding based on elastomer containing n-benzylurea group in bound form and n-benzylpolyoxyalkylene polyamine suitable therefor

PURPOSE: To obtain the subject molding excellent in flowability and improved in stretchability and tensile breaking strength, by reacting a (modified) org. polyisocyanate with a specific secondary polyoxyalkylene-polyamine and an alkyl subsid. aromatic polyamine. CONSTITUTION: Org. and/or modified org. polyisocyanate (A) and secondary polyoxyalkylene-polyamine (B) composed of a mixture of N, N'-dibenzyl- polyoxyalkylene-diamine, N,N',N"-tribenzyl-polyoxyalkylene-triamine, N-benzyl subsid. polyoxyalkylene-diamine and -triamine mixture with a mol.wt. of 410-800 or N-benzyl-polyoxyalkylene-polyamine (i) and polyoxyalkylene-polyamine with a mol.wt. of 1,100-8,000 having 2-4 primary amino groups (ii) and alkyl subsid. aromatic polyamine having a mol.wt. of up to 500 (C) are reacted in the presence of a catalyst according to circumstances to obtain the objective molding. COPYRIGHT: (C)1992,JPO