METHOD OF PREPARING RIGID POLYURETHANE FOAM FOR CAR DOOR UPHOLSTERING Russian patent published in 1995 - IPC

FIELD: polyurethane foam preparing. SUBSTANCE: frothing agent, organosilicon stabilizing agent and catalytic mixture consisting of tertiary amine and potassium dimethylaminopropionate at their ratio 0.2-1.99/1, respectively, were added to hydroxyl-containing component that is a mixture of low-molecular and high-molecular polyols and polyatomic alcohols. Mixture is stirred, and polyisocyanate is added. Mixture is poured into shape heating up to 50 C. Time shaping is 4-4.5 min, article mass is 1540-1600 g. EFFECT: improved method of polyurethane foam preparing. 1 tbl