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:
Nov. 26, 2013
Filed:
May. 28, 2008
Masanori Koike, Kyoto, JP;
Hideaki Saito, Kyoto, JP;
Masanori Koike, Kyoto, JP;
Hideaki Saito, Kyoto, JP;
Sanyo Chemical Industries, Ltd., Kyoto, JP;
Abstract
The object is to develop a resin for a toner, which has both of hot offset resistance and a low-temperature fixing property even when used in a high-speed and energy-saving toner. Thus, disclosed is a resin for a toner, which comprises a polyester resin (A) having a THF insoluble fraction content of 1 to 36 wt %, a peak top molecular weight of 4500 to 20000 as measured by gel permeation chromatography on a THF soluble fraction, and a softening point of 120 to 180° C., and meeting the requirements represented by the following formulae (1) and (2):(Acid value)/(hydroxyl value)≧1 (acid value=15 to 80 mgKOH/g, hydroxyl value≧3.0 mgKOH/g)  Formula (1)(A numeric value of the THF-insoluble fraction content expressed in % by weight)/(a numeric value of the softening point expressed in degree ° C.)≦0.2  Formula (2).