公开(公告)号：DE59509610D1

公开(公告)日：2001-10-25

申请号：DE59509610

申请日：1995-06-20

Applicant: BASF AG

Inventor： ENGELHARDT DR ,  HERFERT DR ,  STUEVEN UWE ,  RIEGEL ULRICH ,  FUNK DR ,  SEIP DR

IPC: A61F13/53 ,  A61F13/15 ,  A61F13/49 ,  B01D15/00 ,  B01J20/26 ,  C08G59/40 ,  C08J3/12 ,  C08J7/04 ,  C08L1/00 ,  C08L1/02 ,  C08L3/00 ,  C08L3/04 ,  C08L33/04 ,  C08L33/08 ,  C08L33/10 ,  C08L51/00 ,  C08L59/00 ,  C08L63/00 ,  C08L67/00 ,  C08L67/02 ,  C08L69/00 ,  C08L75/00 ,  C08L75/02 ,  C08L75/04 ,  C08L83/02 ,  C08L83/04 ,  C08L101/00

公开(公告)号：DE59610360D1

公开(公告)日：2003-05-28

申请号：DE59610360

申请日：1996-07-01

Applicant: BASF AG

Inventor： ENGELHARDT DR ,  STUEVEN DR ,  DANIEL THOMAS DR ,  HERFERT DR

IPC: A61L15/34 ,  A61L15/60 ,  C08J3/075 ,  C08J3/12 ,  C08J7/04 ,  C08L1/28 ,  C08L3/08 ,  C08L91/06 ,  C09D123/06 ,  C09D123/30 ,  C09D191/06

Abstract: Hydraulic, highly swellable hydrogel (H)- coated with 0.05 - 2 wt.% unreactive, water-insoluble wax (w.r.t. (H)). Also claimed are: (i) the prepn. of (H) by applying the wax onto the hydrogel; and (ii) a method for preventing hydrogels getting dusty by coating them with 0.05 - 2 wt.% wax. Pref. the wax has a m.pt. or drip temp. of 30-180 degrees C and is pref. grafted montan wax or polyethylene wax (oxidate). The hydrogel is coated with 0.1-0.95 wt% wax. (H) is a polymer comprising (co)polymerised hydrophilic monomers, graft (co)polymer comprising one or more hydrophilic monomers grafted onto a suitable backbone, cross-linked cellulose- or starch ether, or natural substance swellable in aq. liq(s)..

公开(公告)号：DE59709730D1

公开(公告)日：2003-05-15

申请号：DE59709730

申请日：1997-01-10

Applicant: BASF AG

Inventor： ENGELHARDT DR ,  DANIEL DR ,  HERFERT DR ,  REMMEL GUSTAV ,  RIEGEL ULRICH ,  STUEVEN DR-ING

IPC: C08J3/20 ,  C08J3/075 ,  C08J11/06 ,  C08L33/02 ,  C08L41/00 ,  C08L43/00 ,  C08L43/02 ,  C08L51/00 ,  C08L101/00 ,  C08L101/14