Sughrue, Rothwell, Mion, Zinn and Macpeak
Flame-and smoke-resistant flexible polyurethane foam and compressed foam sheet
 The flexible polyurethane foams having high flame resistance and smoke resistance can be produced by reacting a polyhydroxyl compound and a polyisocyanate with a urea derivative selected from the group consisting of PA1 (a) a compound represented by the general formula ##STR1## wherein at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represents hydroxylalkyl, alkoxyalkyl, alkyl and aryl groups and the remainder represents hydrogen atom, and PA1 (b) a urea-formaldehyde condensation product in the presence of a catalyst, a surfactant and a blowing agent. These polyurethane foams can easily provide the favorable foam sheets by compression-molding these foams under heating. 
Bridgestone Tire Company, Limited
C C Y
C08G C08G Y10S
inventional inventional additional
Minoru Masumi Toshio Takashi
Kojima Saito Yukuta Ohashi