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:
Apr. 02, 2013
Filed:
Nov. 04, 2005
Applicants:
Patric Meessen, La Calamine, BE;
Johannes Hendrik Geesink, Schinnen, NL;
Inventors:
Patric Meessen, La Calamine, BE;
Johannes Hendrik Geesink, Schinnen, NL;
Assignee:
Lanxess Elastomers B.V., Geleen, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10M 149/00 (2006.01); C10M 159/12 (2006.01); C08F 8/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process is provided for preparing an imidized polymer in a mixing or kneading device, by a reaction in the presence of an acid of a mixture containing a polymer having anhydride groups or derivatives thereof and an aromatic polyamine compound. A solid multifunctional viscosity modifier is also provided which includes a polymer having between 0.1 and 10 functional groups per 1000 C-atoms. The functional groups include aromatic amine based imide groups with a ratio of imide groups to the functional groups being more than 0.85.