| abstract |
PURPOSE: To obtain the titled composition useful as a hardener, modifying agent, crosslinking agents, etc. for water-soluble high polymers, etc., by reacting an organic isocyanate with a specific polyethylene oxide in a specific proportion, and blocking the residual isocyanate with a blocking agent. n CONSTITUTION: (A) 100pts.wt. organic isocyanate, e.g. diphenylmethane diisocyanate, is reacted with (B) 1W20pts.wt. polyethylene oxide derivative expressed by formulas I and/or II (R and R' are 1W4C alkyl; n and m are average 5W 120), e.g. methoxypolyethylene glycol (650mol.wt.) for n=14, bis(methoxypolyethylenoxy)malonate (1,400mol.wt) for n+m=28.8, etc. The residual isocyanate is then blocked with a blocking agent to give the aimed water-dispersible compound. n COPYRIGHT: (C)1986,JPO&Japio |