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. 24, 1995
Filed:
Jul. 20, 1993
UBE Industries, Ltd., Yamaguchi, JP;
Abstract
A terminal modified imide oligomer fusible at a relatively low temperature and usable for prepregs free from solvent or as a hot melt-type binder, includes (A) an unsaturated imide compound prepared by a reaction of a substituted nadic anhydride with an aromatic diamine and provided with terminal unsaturated hydrocarbon groups and imide groups located in inside portions of the compound molecule and (B) a terminal modified imide oligomer prepared by a reaction of (a) a carboxylic acid component comprising (i) 2,3,3',4'-biphenyltetracarboxylic anhydride and (ii) a substituted or unsubstituted nadic anhydride, with (b) a diamine component comprising at least one aromatic diamine, provided with terminal unsaturated hydrocarbon groups and imide groups located in inside portions of the oligomer molecule and having a logarithmic viscosity number of 0.03 to 1.0, determined in a concentration of 0.5 g/100 ml in N-methyl-2-phyrrolidone at 30.degree. C.