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:
May. 26, 1998
Filed:
Dec. 27, 1996
Applicant:
Inventors:
William E Slack, Moundsville, WV (US);
Jyothi S Pisipati, Wexford, PA (US);
Assignee:
Bayer Corporation, Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ; C08G / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
528 59 ; 521 495 ; 525452 ; 525457 ; 525458 ; 528 67 ; 528 76 ; 528 77 ; 560 25 ; 560 26 ; 560336 ; 560360 ;
Abstract
A substantially solid free isocyanate prepolymer is made by reacting an isocyanate mixture which is made up of a toluene diisocyanate residue containing monomeric toluene diisocyanate and optionally, additional monomeric toluene diisocyanate in an amount such that the total NCO content is at least 37% with a polyether polyol having an ethylene oxide content of at least 30%. The polyether polyol has a molecular weight of from about 200 to about 6,000 and a functionality of from 2 to 6. The product prepolymers are particularly useful in the production of polyurethanes.