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:
Mar. 26, 1985
Filed:
Feb. 08, 1984
Applicant:
Inventors:
Andreas R Schmidt, Reinach, CH;
Herbert F Strohmayer, Allentown, PA (US);
Walter Sibral, Tulln, AT;
Barton Milligan, Coplay, PA (US);
Assignee:
Air Products and Chemicals, Inc., Allentown, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ;
U.S. Cl.
CPC ...
528 64 ; 528 63 ; 528 65 ; 1523 / ;
Abstract
This invention pertains to the synthesis of polyurethane systems having low hysteresis. The systems are generated by reacting a prepolymer of a mononuclear diisocyanate and a polyol with a chain extender mix of a mononuclear aromatic diamine and a polyol. The prepolymer should have a free isocyanate content of from 2 to about 12% by weight and the chain extender mix should have an amine to polyol equivalent from about 0.5 to 5:1.