RAVECARB - Caffaro Industrie SpA

COMPARATIVE TESTS: THERMOPLASTIC PUR Synthesis conditions Polyol + BD 1,4 (1,4 Butandiol) + MDI (4,4’ diphenyl methanediisocyanate) Stoichiometric condition: NCO/OH = 1,04 // 1,4 BD/Polyol = 1 Polymerisation 60-80°C in DMF; 5 hours Receipe Polyol 100 part by weight 1,4 BD 9 MDI 52 DMF 300 ( 100 + 200) (Polyol+ 1,4BD in DMF)+ MDI - (80 °C, 3 h) + DMF to control the increase of viscosity PUR is dried in ventilated oven at 70 °C and then pressed at 150 °C to obtain PUR specimen 16