公开(公告)号：US20240301272A1

公开(公告)日：2024-09-12

申请号：US18283229

申请日：2022-03-17

Applicant: BASF SE

Inventor： Christian SCHMIDTKE ,  Andrea ASSMANN ,  Martin WINKLBAUER ,  Lisa WOLFERSTETTER

IPC: C09K8/467 ,  C04B18/02 ,  C04B24/16 ,  C04B24/22 ,  C04B24/26 ,  C04B24/30 ,  C04B24/32 ,  C04B28/02 ,  C04B103/00 ,  C04B103/40 ,  E21B33/14

CPC classification number: C09K8/467 ,  C04B18/022 ,  C04B24/163 ,  C04B24/166 ,  C04B24/22 ,  C04B24/226 ,  C04B24/2676 ,  C04B24/305 ,  C04B24/32 ,  C04B28/02 ,  E21B33/14 ,  C04B2103/0057 ,  C04B2103/406

Abstract: Water-dispersible polymer powder composition for use as additive in cementing in subterranean formations comprising at least particles of a styrene-butadiene polymer, a water-soluble polymer, and a non-ionic emulsifier, wherein the styrene-butadiene polymer particles are at least partly covered by and/or embedded in a composition comprising at least the water-soluble polymer, process of making such compositions, by spray-drying an aqueous dispersion comprising said particles of a styrene-butadiene polymer and a water-soluble polymer, wherein at least one non-ionic emulsifier is added before or after spray-drying, and the use of such water-dispersible polymer powder compositions for cementing in subterranean formations penetrated by at least a well bore.