Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
Patent
1995-06-16
1997-06-03
Sergent, Rabon
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Process of treating scrap or waste product containing solid...
521 47, 525452, 525453, 525454, 525459, 560 24, 560 25, 560 26, 560115, 560157, 560158, 564 32, 568700, 568852, 568853, 568854, 568858, 568868, 568877, C08J 1124, C07C 29128
Patent
active
056355424
ABSTRACT:
The present invention relates to a process for the production of hydroxyl-group-containing compounds suitable for the polyisocyanate polyaddition process from polyurea and/or polyurethane polyurea wastes by treating polyurea and/or polyurethane polyurea wastes with diols and/or polyols at temperatures from 160.degree. to 260.degree. C., the water present in the reaction vessel preferably being removed by distillation during the heating-up phase, characterized in that 1,3-dicarbonyl compounds are added to the reaction mixture before or during the reaction.
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Meckel Walter
Munzmay Thomas
Rasshofer Werner
Bayer Aktiengesellschaft
Gil Joseph C.
Sergent Rabon
Whalen Lyndanne M.
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