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:
Sep. 12, 2017
Filed:
Apr. 02, 2013
Shenzhen Leputai Technology Co., Ltd, Shenzhen, Guangdong, CN;
Zhijun Liu, Shenzhen, CN;
Yuanyuan Zhang, Shenzhen, CN;
Tiantian Pu, Shenzhen, CN;
Xiao Yuan, Shenzhen, CN;
Hong Meng, Shenzhen, CN;
Hui Yang, Shenzhen, CN;
SHENZHEN LEPUTAI TECHNOLOGY CO., LTD, Shenzhen, CN;
Abstract
A method for preparing suspension polymerization toner of core-shell structure comprises following steps: 1) preparing a monomer oil phase containing a certain amount of polar resin forming toner soft core resin and aqueous dispersion liquid respectively; 2) adding the monomer oil phase into the aqueous dispersion liquid, transferring a mixture into a reactor after high-speed shearing and suspension granulation, and carrying out a first heating polymerization reaction to obtain toner particles of soft-core hard-shell structure; 3) taking the toner particles of soft-core hard-shell structure as a core layer, adding a cationic monomer component, and carrying out a second polymerization reaction through a water-soluble initiator to obtain the toner particles of soft-core hard-shell structure with dense charge surface layers uniformly distributed on outer surfaces; and 4) cleaning, filtering, and sufficiently drying a preceding product, and then adding silicon dioxide.