公开(公告)号：US11015006B2

公开(公告)日：2021-05-25

申请号：US16093364

申请日：2017-04-05

Applicant: BASF SE

Inventor： Peter Leidinger ,  Piotr Antoni Bazula ,  Holger Misslitz ,  Gregor Herth ,  Stefan Friedrich ,  Maik Schlesinger

IPC: C08F220/48 ,  C04B20/10 ,  C09K8/588 ,  C08J3/12 ,  C09K8/487 ,  C09K8/467 ,  C08F220/56 ,  C04B24/16 ,  C09K8/508 ,  C09K8/516 ,  C04B111/20 ,  C04B103/00 ,  C08J7/06

Abstract: The present invention relates to coated polymer particles comprising a water-swellable polymer core and an essentially continuous coating encapsulating the core. The coating comprises an oxide, hydroxide or oxide hydrate of silicon, aluminum, zirconium, tin or titanium. The polymer particles do not show instantaneous swelling, when contacted with water or a water-containing liquid, but show delayed water absorption after an appropriate period of time. The coated polymer particles may be used in oil fields, in mining, for construction chemical compositions or as carrier for active substances. The coated polymer particles are prepared by a suspension coating process or a fluidized bed coating process.

公开(公告)号：US11786887B2

公开(公告)日：2023-10-17

申请号：US17309443

申请日：2019-12-06

Applicant: BASF SE ,  BASF CORPORATION

Inventor： Maximilian Hemgesberg ,  Meik Ranft ,  Edith Schneider ,  Marko Buchholz ,  Maik Schlesinger ,  Denis Schwall ,  Yi Liu

IPC: B01J29/072 ,  B01J29/76 ,  B01D53/94 ,  B01J35/02 ,  B01J37/02 ,  B01J37/04 ,  F01N3/20 ,  F01N3/28

CPC classification number: B01J29/763 ,  B01D53/9418 ,  B01J35/023 ,  B01J37/0219 ,  B01J37/04 ,  F01N3/2066 ,  F01N3/2803 ,  B01D2255/20715 ,  B01D2255/20738 ,  B01D2255/20761 ,  B01D2255/50 ,  B01D2255/9202 ,  F01N2370/04

Abstract: An aqueous suspension comprising water, a zeolitic material and one or more of copper and iron, and a chelate complex comprising a zirconium ion and a bidentate organic ligand bonded to said zirconium ion via zirconium oxygen bonds from two oxygen atoms comprised in said ligand, said chelate complex being dissolved in the water.