Production manner null of poriuretanurea erasutoma

摘要

PURPOSE:To obtain the titled elastomer useful as exterior automotive trims, etc. without causing voids, by subjecting a polyol component containing a specific active hydrogen compound having high molecular weight and a chain extender and a polyisocyanate to reaction injection molding. CONSTITUTION:(A) (i) 100pts.wt. high-molecular weight polyol (e.g., compound obtained by addition of ethylene oxide to ethylene glycol) having 20-60 hydroxyl number is blended with (ii) 0.1-0.5mol low-molecular weight polyol having 62-240mol.wt., (iii) 0.01-0.1mol aromatic diamine having 108-400mol.wt., and (iv) 0.001-0.02mol aminated polyether (compound obtained by amination of the component ii or iii, etc.) having 200-5,000mol.wt. and preferably bi--tetrafuntional functionality, to give a polyol component, which is rapidly blended with (B) a polyisocyanate compound and (C) a catalyst (e.g., organotin compound, etc.), and molded into a mold, to give the aimed polymer.