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. 30, 2009
Filed:
Aug. 13, 2007
Jinn-luh Ou, Taipei, TW;
Yuh Sung, Taoyuan, TW;
Chang-ping Chang, Taoyuan, TW;
Ming-der Ger, Taoyuan, TW;
Szu-ching Hsiao, Taoyuan, TW;
Yan-cheng Chen, Taoyuan, TW;
Jinn-Luh Ou, Taipei, TW;
Yuh Sung, Taoyuan, TW;
Chang-Ping Chang, Taoyuan, TW;
Ming-Der Ger, Taoyuan, TW;
Szu-Ching Hsiao, Taoyuan, TW;
Yan-Cheng Chen, Taoyuan, TW;
National Defense University, Taoyuan, TW;
Abstract
The present invention discloses a two-stage process for preparing functionalized magnetizable microspheres. The first stage includes forming an inner shell of styrene polymer or styrene copolymer around magnetizable nano particles having a monolayer of a non-water-soluble dispersing agent coated thereon. The second stage includes forming an outer shell of styrene polymer or styrene copolymer with sulfate (SO) bounded thereto around the inner shell by free radical polymerization. Preferably, nano particles of a noble metal are deposited on the surface of the outer shell. The magnetizable microspheres prepared by the process of the present invention have a size of 100-1000 nm, and the thickness ratio of the inner shell to the outer shell ranges from 10:1 to 1:10.