公开(公告)号：US20150087796A1

公开(公告)日：2015-03-26

申请号：US14561462

申请日：2014-12-05

Applicant: BASF SE

Inventor： Pierre-Eric MILLARD ,  Gregor HERTH ,  Stefan FRIEDRICH

IPC: C08F220/34

CPC classification number: C08F220/34 ,  C08F222/38 ,  C08F226/02 ,  C08F226/04

Abstract: New water soluble cationic copolymers derived from N-vinyl amide monomers and ethylenically unsaturated compounds bearing cationic groups.

Abstract translation: 来自N-乙烯基酰胺单体和带有阳离子基团的烯属不饱和化合物的新型水溶性阳离子共聚物。

公开(公告)号：US20190211127A1

公开(公告)日：2019-07-11

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 ,  C08J7/06 ,  C09K8/516 ,  C09K8/508 ,  C09K8/588 ,  C04B24/16 ,  C04B20/10

CPC classification number: C08F220/48 ,  C04B20/1066 ,  C04B20/1074 ,  C04B24/163 ,  C04B2103/0049 ,  C04B2111/29 ,  C08F220/56 ,  C08F2800/10 ,  C08J3/128 ,  C08J7/06 ,  C08J2300/14 ,  C08J2333/20 ,  C08J2333/26 ,  C09K8/467 ,  C09K8/487 ,  C09K8/5083 ,  C09K8/516 ,  C09K8/588 ,  C04B24/2652 ,  C08F220/06 ,  C08F222/385 ,  C08F2220/585

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.