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:
Feb. 17, 2009
Filed:
May. 24, 2006
Mikio Koyama, Kunitachi, JP;
Kenji Hayashi, Hachioji, JP;
Mikio Koyama, Kunitachi, JP;
Kenji Hayashi, Hachioji, JP;
Konica Minolta Business Technologies, Inc., Tokyo, JP;
Abstract
A method of manufacturing a toner comprising the steps of: (i) forming oil droplets in an aqueous medium comprising a surfactant having a long chain hydrocarbon group and an acid group, the oil droplets comprising: (i-a) a polycarboxylic acid having two or more carboxyl groups, (-b) a polyalcohol having two or more hydroxyl groups, (i-c) a styrene compound, (i-d) a (meth)acrylate ester; (ii) polycondensing the polycarboxylic acid and the polyalcohol by heating to form a polyester resin in the oil droplets; (iii) radically polymerizing the styrene compound and the (meth)acrylate ester by supplying radicals to form a styrene-acryl copolymer resin in the droplets, as a result of steps (ii) and (iii), composite resin particles containing the polyester resin and the styrene-acryl copolymer resin are formed; and (iv) coagulating the composite resin particles in an aqueous medium.