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:
Apr. 05, 1994
Filed:
Sep. 10, 1992
Applicant:
Inventors:
Christian Wolfrum, Koln, DE;
Ulrich Knipp, Bergisch Gladbach, DE;
Peter Schuster, Mannheim, DE;
Martin Brock, Neulussheim, DE;
Ronald Boot, Bensheim, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264 464 ; 264 451 ; 2642711 ; 264300 ; 2643286 ;
Abstract
A process for the production of composite bodies consisting of a polyurethane core and a polyurethane covering, with the core being positioned inside a mold so that an average distance of at least 0.5 mm exists between the surface of the core and the internal wall of the mold. The gap between the core and the internal wall of the mold is filled with a reaction mixture composed of a) a polyisocyanate component, and b) a polyol component. The polyol component b) must have a weight ratio of carbon to oxygen of at least 2.5:1.