Patent ID: 6433034
Filing Date: 2002-08-13
Classification: A61F,B29K,C08G,C08J,Y10S

Abstract:
A process for preparing a rigid polyurethane foam by reacting:(1) a polyisocyanate; (2) an isocyanate reactive compound having an average equivalent weight of at most 374 and an average number of isocyanate-reactive hydrogen atoms of from 2 to 8; (3) an isocyanate-reactive compound having an average equivalent weight of more than 374 and an average number of isocyanate-reactive hydrogen atoms of from 2 to 6; and (4) water, wherein a total weight of compound (1), compound (2), compound (3) and compound (4) represents 100 parts per weight, the amount of compound (2) ranges from 2-20 parts by weight relative to the total weight, the amount of compound (3) ranges from 5-35 parts by weight relative to the total weight and the amount of compound (4) ranges from 1-17 parts by weight relative to the total weight.