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:
Aug. 14, 2018
Filed:
Nov. 12, 2013
Applicant:
Ems-patent Ag, Domat/Ems, CH;
Inventor:
Andreas Kaplan, Chur, CH;
Assignee:
EMS-PATENT AG, Domat/Ems, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 229/00 (2006.01); C08G 18/82 (2006.01);
U.S. Cl.
CPC ...
C07D 229/00 (2013.01); C08G 18/82 (2013.01);
Abstract
The invention relates to a method for the production of 4,4'-methylenebis(phenylisocyanate) dimer (MDI dimer) which is distinguished by an MDI dimer being obtained which is present in high purity. The MDI dimer which is produced according to the method according to the invention is distinguished by being essentially free of MDI and also urea derivatives. Furthermore, the invention relates to a corresponding MDI dimer and also the use thereof as crosslinker for polyurethanes.