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:
Oct. 25, 1977
Filed:
Sep. 17, 1976
Peter S Carleton, Branford, CT (US);
James H Ewen, Jr, New Haven, CT (US);
Harold E Reymore, Jr, Wallingford, CT (US);
The Upjohn Company, Kalamazoo, MI (US);
Abstract
A novel liquid isocyanate prepolymer composition is disclosed. The prepolymer is obtained by reacting a polymethylene polyphenylisocyanate containing from about 65 to about 85 percent by weight of methylenebis(phenylisocyanate) the remainder of said polymethylene polyphenylisocyanates having a functionality greater than 2, with from about 0.0185 to about 0.15 equivalent per equivalent of said polyphenylisocyanate of a polyoxyethyleneglycol having an average molecular weight of from about 200 to about 600. The liquid isocyanates so produced are characterized as storage stable liquids of relatively low viscosity which when used as the isocyanate component in polyurethane formulations, particularly molded polyurethanes, give rise to highly resilient and useful molded products.