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. 27, 2010
Filed:
Oct. 02, 2007
Hartmut Nefzger, Pulheim, DE;
Gerhard Klein, Monheim, DE;
Manfred Schmidt, Dormagen, DE;
Jens Krause, Köln, DE;
James-michael Barnes, Breitscheid, DE;
Erika Bauer, Jüchen, DE;
Hartmut Nefzger, Pulheim, DE;
Gerhard Klein, Monheim, DE;
Manfred Schmidt, Dormagen, DE;
Jens Krause, Köln, DE;
James-Michael Barnes, Breitscheid, DE;
Erika Bauer, Jüchen, DE;
Bayer MaterialScience AG, Leverkusen, DE;
Abstract
The present invention relates to polyester polyols with low functionality and a process for their production, to prepolymers prepared from these polyester polyols and a process for their production, and to polyurethanes prepared from these polyester polyols and/or from these prepolymers, and to processes for their production. These polyester polyols are produced in a two-step process. In the second step of this two-step process, one or more cyclic ester monomers is reacted with one or more polyester polyols at low temperatures.