The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 31, 2006
Filed:
Nov. 29, 2002
Applicants:
Joern Volker Weiss, Haltern, DE;
Thomas Weihrauch, Duelmen, DE;
Werner Grenda, Herne, DE;
Silvia Herda, Herne, DE;
Klaus Behrendt, Herne, DE;
Inventors:
Joern Volker Weiss, Haltern, DE;
Thomas Weihrauch, Duelmen, DE;
Werner Grenda, Herne, DE;
Silvia Herda, Herne, DE;
Klaus Behrendt, Herne, DE;
Assignee:
Degussa AG, Duesseldorf, DE;
Primary Examiner:
Int. Cl.
CPC ...
C08G 18/32 (2006.01); C08G 18/79 (2006.01);
U.S. Cl.
CPC ...
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.