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:
Jan. 15, 2013
Filed:
Dec. 14, 2009
Yen-chung Chen, Longtan Shiang, TW;
Hsiou-jeng Shy, Sanchong, TW;
Ming-der Ger, Daxi Town, TW;
Hung-fang Huang, Daxi Township, Taoyuan County, TW;
Shang-wanq Yeh, Longtan Shiang, TW;
Yen-Chung Chen, Longtan Shiang, TW;
Hsiou-Jeng Shy, Sanchong, TW;
Ming-Der Ger, Daxi Town, TW;
Hung-Fang Huang, Daxi Township, Taoyuan County, TW;
Shang-Wanq Yeh, Longtan Shiang, TW;
Abstract
A preparing method for coating polymethylmethacrylate (PMMA) particles with silicon dioxide is disclosed and includes the following steps of: preparing a silicon dioxide solution by mixing a silicon dioxide powder and a solvent; adding a dispersant-and-interface-modifier agent into the silicon dioxide solution; performing a wet grinding to the silicon dioxide solution with the dispersant-and-interface-modifier agent so as to obtain a plurality of nano-sized silicon dioxide particles with negative charge; performing an interface modification to a plurality of PMMA particles to be charged with positive charge; adding the PMMA particles into the silicon dioxide solution; making the PMMA particles adsorb the nano-sized silicon dioxide particles; and performing a solid-liquid separation process to the silicon dioxide solution so as to obtain the chemical composite particles.