US 12,187,648 B2
Modified calcined kaolin particle with surface amphiphilicity and preparation method thereof
Yongbing Yuan, Yueyang (CN); Xinyu Tang, Yueyang (CN); Junkang Shi, Yueyang (CN); Congshan Zhou, Yueyang (CN); Shuqin Zheng, Yueyang (CN); Lijun Li, Yueyang (CN); An Li, Yueyang (CN); and Jundong Xu, Yueyang (CN)
Assigned to HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY, Yueyang (CN)
Filed by HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY, Yueyang (CN)
Filed on Aug. 13, 2024, as Appl. No. 18/802,061.
Claims priority of application No. 202311744474.2 (CN), filed on Dec. 19, 2023.
Prior Publication US 2024/0400458 A1, Dec. 5, 2024
Int. Cl. C04B 33/04 (2006.01); C04B 33/13 (2006.01); C08K 3/34 (2006.01)
CPC C04B 33/04 (2013.01) [C04B 33/1305 (2013.01); C08K 3/346 (2013.01)] 11 Claims
 
1. A method for preparing modified calcined kaolin particles having surface amphiphilicity, comprising:
drying and sieving the calcined kaolin particles, adding monohydric alcohol, and stirring to obtain a suspension A;
preparing an ethanol solution of a vinyl silane coupling agent, and stirring for a period of time at a certain temperature to obtain a solution B;
dropwise adding the solution B into the solution A, and stirring for a period of time at a certain temperature to obtain a suspension C;
continuously introducing inert gas into the suspension C, adding a certain amount of sulfhydryl compound, stirring for a period of time at a certain temperature to obtain suspension D, filtering, washing and drying to obtain the modified calcined kaolin particles;
wherein the sulfhydryl compound is one or more of 2-mercaptoethanol, 16-mercaptohexadecanoic acid, 4-mercapto-1-butanol, 3-mercapto-2-butanone, 4-mercaptobenzoic acid, 3-mercapto-1-propanol, and 6-mercapto-1-hexanol.