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:
Jun. 03, 1997
Filed:
Jun. 16, 1995
Applicant:
Inventors:
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08J / ; C07C / ;
U.S. Cl.
CPC ...
521 495 ; 521 47 ; 525452 ; 525453 ; 525454 ; 525459 ; 560 24 ; 560 25 ; 560 26 ; 560115 ; 560157 ; 560158 ; 564 32 ; 568700 ; 568852 ; 568853 ; 568854 ; 568858 ; 568868 ; 568877 ;
Abstract
The present invention relates to a process for the production of hydroxyl-group-containing compounds suitable for the polyisocyanate polyaddition process from polyurea and/or polyurethane polyurea wastes by treating polyurea and/or polyurethane polyurea wastes with diols and/or polyols at temperatures from 160.degree. to 260.degree. C., the water present in the reaction vessel preferably being removed by distillation during the heating-up phase, characterized in that 1,3-dicarbonyl compounds are added to the reaction mixture before or during the reaction.
Munzmay, Thomas. (1997). Process for the production of hydroxyl-group-containing compounds from (U.S. Patent No. 5635542). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5635542
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile