Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1993-03-25
1995-06-06
Chapman, Mark A.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430109, G03G 900
Patent
active
054222184
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.
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Chapman Mark A.
Industrial Technology Research Institute
Liauh W. Wayne
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