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:
Dec. 25, 1990
Filed:
Mar. 15, 1989
Noriyuki Tajiri, Toyohashi, JP;
Masayuki Takyu, Toyohashi, JP;
Hirokazu Ito, Toyohashi, JP;
Ryo Funato, Nagoya, JP;
Shinji Kubo, Nagoya, JP;
Mitsubishi Rayon Company, Ltd., Tokyo, JP;
Abstract
Disclosed is a crosslinked polyester for a toner, which has an acid value of 5 to 20 mgKOH/g, a flow index of 0.1.times.10.sup.-4 to 300.times.10.sup.-4 ml/sec and a softening point lower than 145.degree. C., the polyester being formed by mixing a dicarboxylic acid component, a diol component and at least one crosslinking component selected from a polyfunctional carboxylic acid component having a trivalency or a higher valency and a polyhydric alcohol component having a trivalency or a higher valency at a mixing ratio represented by the following formula (1), reacting the mixture at a reaction ratio represented by the following formula (2) and subjecting the esterification product to polycondensation and crosslinking.