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:
Jul. 09, 2013
Filed:
Oct. 24, 2009
Applicants:
Hartmut Nefzger, Pulheim, DE;
Erika Bauer, Jüchen, DE;
Johannes Van DE Braak, Hennef, DE;
Jürgen Schloβmacher, Bergheim, DE;
Inventors:
Hartmut Nefzger, Pulheim, DE;
Erika Bauer, Jüchen, DE;
Johannes Van de Braak, Hennef, DE;
Jürgen Schloβmacher, Bergheim, DE;
Assignee:
Bayer MaterialScience AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J 9/04 (2006.01); C08G 18/42 (2006.01); C07C 69/003 (2006.01); C07C 69/00 (2006.01); C07C 67/08 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to the production and use of polyester polyols, formed from at least one carboxylic acid anhydride and ethylene glycol, wherein a specialized reaction control substantially suppresses the formation of 1,4-dioxane from diethylene glycol.