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:
Jun. 06, 1995
Filed:
Mar. 25, 1993
Hun-Yi Tong, Miao Li Hsien, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A toner composition for use in electrophotographic processes containing a resin binder which about 10 to 40% of THF-insoluble gel portion and about 60 to 90% of THF-soluble portion. The THF-soluble portion has a trimodal molecular weight distribution having three main peaks as shown in chromatograms from gel permeation chromatography, the first main peak has a molecular weight between 3,000 and 30,000, the second main peak has a molecular weight between 30,000 and 200,000, and the third main peak has a molecular weight between 200,000 and 2,750,000. The ratio among the first, second, and third main peaks is about 0.4-1.0/1/0.4-1.5, measured based on their respective peak heights. The resin binder further contains about 0.5 to 1.5% polysiloxane uniformly dispersed therein. The polysiloxane is added to the resin binder along with polymerization monomers during the polymerization reaction to produce the resin binder.