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:
Feb. 14, 2017
Filed:
Dec. 13, 2010
Applicants:
Stefan Sommer, Leverkusen, DE;
Thorsten Rische, Columbus, GA (US);
Erhard Luehmann, Bomlitz, DE;
Inventors:
Assignee:
Covestro Deutschland AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 18/08 (2006.01); C08G 18/12 (2006.01); C08G 18/67 (2006.01); C08G 18/75 (2006.01); C08G 18/73 (2006.01); C08G 18/68 (2006.01); C08G 18/62 (2006.01);
U.S. Cl.
CPC ...
C08G 18/0823 (2013.01); C08G 18/0866 (2013.01); C08G 18/12 (2013.01); C08G 18/6225 (2013.01); C08G 18/6229 (2013.01); C08G 18/672 (2013.01); C08G 18/6705 (2013.01); C08G 18/6795 (2013.01); C08G 18/68 (2013.01); C08G 18/73 (2013.01); C08G 18/755 (2013.01); C08G 18/758 (2013.01);
Abstract
The present invention relates to a process for the preparation of low-viscosity, radiation-curable, aqueous dispersions based on polyurethane acrylates (UV-PUDs), wherein the UV-PUDs hydrophilized via hydroxy-functionalized carboxylic acids have a lower initial viscosity when a large part of the urethanization, that is to say the reaction of the NCO-functionalized compounds with the OH-functionalized compounds, initially takes place in the absence of the acid-carrying compounds and the incorporation of the acid-carrying compounds via their hydroxyl function takes place as late as possible.