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. 15, 2011
Filed:
Oct. 22, 2007
Tomeyoshi Ohori, Ibaraki, JP;
Hiroshi Wada, Ibaraki, JP;
Tomeyoshi Ohori, Ibaraki, JP;
Hiroshi Wada, Ibaraki, JP;
Asahi Glass Company, Limited, Tokyo, JP;
Abstract
It is an object of the present invention to provide an isocyanate group-terminated urethane prepolymer which has a low viscosity at melting and a process for producing the same, and an adhesive which comprises the urethane prepolymer. The invention relates to a process for producing an isocyanate group-terminated urethane prepolymer which comprises reacting polyols with a polyisocyanate compound, wherein the polyols comprise 10 to 50% by mass of a polyester polyol and 90 to 50% by mass of a polycarbonate polyol and wherein a sebacic acid-derived polyester polyol which is a polycondensate of sebacic acid with a diol compound accounts for 50 to 100% by mass of the polyester polyol and wherein the polyisocyanate compound and the polyols are reacted in such amounts that the ratio (by mol) of the isocyanate group/hydroxyl group is 1.2 to 3.2.