公开(公告)号：US11008256B2

公开(公告)日：2021-05-18

申请号：US16094557

申请日：2017-04-07

Applicant: BASF SE

Inventor： Radoslaw Kierat ,  Michael Klemens Mueller ,  Andreas Kempter ,  Oscar Lafuente Cerda ,  Kai Bergner

IPC: B05D7/00 ,  B32B5/16 ,  C04B20/10 ,  C04B28/02 ,  C04B40/06 ,  C04B22/06 ,  C04B111/00 ,  C04B111/34 ,  C04B111/60 ,  C04B111/70 ,  C04B111/72 ,  C04B111/62 ,  C04B111/28

Abstract: The invention relates to a process for preparing silica-coated particles of an inorganic expanding agent, the silica-coated particles and their use. The silica-coated particles show a delayed release of the expanding agent particularly in alkaline medium and at elevated temperatures. They are therefore useful in the oil and construction industry.