Rigid foamed polyurethane-forming compositions, foamed polyurethane moldings and models made of the same

摘要

A rigid foamed polyurethane molding which reduce dust-scattering in cutting and is useful to a modeling stock. Said molding is produced by curing a composition by a mechanical frothing method, said composition comprising: a polyol with a filler (c); and a slight amount of dehydrating agent (d);;wherein said composition further contains 3 to 30 percent, based on the total weight of the composition, of a (poly) oxyalkylene compound (e) expressed by the general formula; $PTEXTPDATZ\[(AO)/PDATHILSBPDATm/PDAT/SB/HILPDATX\]/PDATHILSBPDATn/PDAT/SB/HIL/PTEXT$ ;in which “A” represents an alkylene group with two to four carbon atoms; “X” is a hydrocarbyl group or an acyl group; “m” is a value of one to one hundred; “n” is an integer of one to six; and “Z” is a residue produced by removing the active hydrogen atoms from a compound containing n active hydrogen atoms, in which at least one of Z and n X's has 5 to 20 carbon atoms.