Patent ID: 6833390
Filing Date: 2004-12-21
Classification: C08G,Y10T

Abstract:
A process for preparing a water-blown rigid polyurethane foam having at least an 80% closed-cell content comprising reacting:(a) at least one polyol mixture comprising: (i) at least one polymer polyol; (ii) at least one polyol having a hydroxyl value within the range of from about 200 to about 800; and (iii) optionally, at least one polyol having a hydroxyl value within the range of from about 25 to about 115; with (b) at least one polymeric isocyanate and/or a prepolymer thereof; in the presence of (c) optionally, at least one catalyst; (d) water; and (e) optionally, at least one additive or auxiliary agent wherein the foam has a perpendicular compressive strength within the range of from about 35 to about 150 lbs/in2 and a tensile adhesion greater than 105 lbs/in2.