METHOD FOR PRODUCING POLYURETHANE PREPOLYMER AND/OR POLYURETHANE-UREA PREPOLYMER
PROBLEM TO BE SOLVED: To provide a method for producing a polyurethane prepolymer and a polyurethane-urea prepolymer. SOLUTION: A polyhydroxy compound or a polyamino compound having a molecular weight of about 400 to about 10,000 is mixed with a diisocyanate in a mixing nozzle 1 (the mixing nozzle h...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a method for producing a polyurethane prepolymer and a polyurethane-urea prepolymer. SOLUTION: A polyhydroxy compound or a polyamino compound having a molecular weight of about 400 to about 10,000 is mixed with a diisocyanate in a mixing nozzle 1 (the mixing nozzle has the 1st inlet port 2, a ring nozzle channel 7 having a definite diameter and the 2nd inlet port 3 and is connected to a stay line 4 through a channel 5; and the 1st inlet port is connected to the ring nozzle channel through one or more holes), the polyhydroxy compound and/or the polyamino compound 30 are introduced into the ring nozzle channel through the 2nd inlet port, the diisocyanate 20 is introduced through one or more holes into the polyhydroxy compound and/or the polyamino compound in the ring nozzle channel and the mixture is reacted in the stay line to produce the prepolymer. COPYRIGHT: (C)2006,JPO&NCIPI |
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