Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Reexamination Certificate
2006-10-31
2006-10-31
Sergent, Rabon (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
C528S067000, C528S073000
Reexamination Certificate
active
07129313
ABSTRACT:
The invention relates to a process for the solvent-free, continuous preparation of polyureas by reacting at least one isocyanate and/or isocyanurate having at least two NCO groups with at least one diamine and/or polyamine in an extruder, intensive kneader, intensive mixer or static mixer by thorough mixing and rapid reaction by briefly heating and subsequent cooling to isolate the end product.
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Behrendt Klaus
Grenda Werner
Herda Silvia
Weihrauch Thomas
Weiss Joern Volker
Degussa - AG
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Sergent Rabon
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