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. 14, 1998
Filed:
Aug. 05, 1996
Merle W Lesko, McDonald, PA (US);
Kristen L Parks, Wexford, PA (US);
Bayer Corporation, Pittsburgh, PA (US);
Abstract
The present invention is directed to the production of molded polyurethane products having high flexural moduli (i.e. 1,000,000 psi or more) and high elongation wherein a reaction mixture is reacted in a closed mold. The reaction mixture comprises reacting a liquid, room temperature stable, isocyanate prepolymer with at least two hydroxy-functional polyethers having average hydroxyl functionalities of from 1.5 to 8 and number average molecular weights of from 350 to 1800, at least one hydroxyl functional organic material containing from 2 to 8 hydroxyl groups and having a number average molecular weight below 350 and at least two hydroxyl functional organic materials having average hydroxy functionalities of from 1.5 to 3 and having number average molecular weights of 4000 or more. The products are prepared from these processes using such specified isocyanate prepolymers and polyol blends.