METHOD OF PREPARING RIGID POLYURETHANE FOAM AND LAMINATE BASED ON IT Russian patent published in 1999 - IPC

FIELD: polymer materials. SUBSTANCE: rigid polyurethane foam and laminate based on it including coating material and indicated polyurethane foam are obtained by bringing into contact urethane-modified polyisocyanate with polyatomic alcohol in presence of gas-formation substance including water. Urethane-modified polyisocyanate (isocyanate group content 10 to 29 wt %) is product of reaction of polymethylenepolyphenylisocyanate with polyol- polyether with molecular weight at least 2000 and oxyethylene group content at least 35 wt %. EFFECT: increased adhesion of polyurethane foam, especially when blowing with water, to coating materials such as metal. 11 cl, 1 tbl, 14 ex