公开(公告)号：DE59507548D1

公开(公告)日：2000-02-10

申请号：DE59507548

申请日：1995-04-01

Applicant: BASF AG

Inventor： KLOTZSCHE HELMUT ,  REMMEL GUSTAV ,  RIEGEL ULRICH ,  STUEVEN UWE

IPC: A61L15/26 ,  A61L15/60 ,  B01J20/26 ,  B01J20/32 ,  C08J3/12

Abstract: Water-swellable hydrophilic (co)polymer powder contains additive(s) to reduce dust. The additive comprises silicone(s) and/or a total of less than 1 wt.% fatty alcohols or their esters, fatty acids or their opt. sulphated esters or amides, sulphosuccinic esters, polyols, polyglycols or their ethers, aliphatic hydrocarbons and/or paraffin oils. The individual additives have a vapour pressure of at most 0.1 mbar at 20 degrees C and m.pt. of max. 100 degrees C. Also claimed is a method of producing the treated powder.

公开(公告)号：DE59711506D1

公开(公告)日：2004-05-19

申请号：DE59711506

申请日：1997-01-10

Applicant: BASF AG

Inventor： DANIEL THOMAS DR ,  HERFERT NORBERT DR ,  REMMEL GUSTAV ,  RIEGEL ULRICH ,  STUEVEN UWE DIPL ING ,  ENGELHARDT FRITZ DR

IPC: C08J3/00 ,  C08J3/075

Abstract: Improving the drying properties of hydrophilic, highly swellable hydrogels when using contact driers by use of surfactant is new. Preferably heated rollers are used having a contact surface temperature at least 120 degrees C. Nonionic or anionic surfactants are used, having an HLB at least 3, in amounts of 0.01-5 wt. %, referred to solids content of the hydrogel. The hydrogels are based on (co)polymers of hydrophilic monomers, graft (co)polymers of hydrophilic monomers on a suitable graft base, crosslinked cellulose or starch ethers or natural products swellable in aqueous liquids, e.g. guar derivatives, optionally chemically modified.

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

公开(公告)号：ES2141271T3

公开(公告)日：2000-03-16

申请号：ES95104872

申请日：1995-04-01

Applicant: BASF AG

Inventor： KLOTZSCHE HELMUT ,  REMMEL GUSTAV ,  RIEGEL ULRICH ,  STUVEN UWE

IPC: A61L15/26 ,  A61L15/60 ,  B01J20/26 ,  B01J20/32 ,  C08J3/12

Abstract: Water-swellable hydrophilic (co)polymer powder contains additive(s) to reduce dust. The additive comprises silicone(s) and/or a total of less than 1 wt.% fatty alcohols or their esters, fatty acids or their opt. sulphated esters or amides, sulphosuccinic esters, polyols, polyglycols or their ethers, aliphatic hydrocarbons and/or paraffin oils. The individual additives have a vapour pressure of at most 0.1 mbar at 20 degrees C and m.pt. of max. 100 degrees C. Also claimed is a method of producing the treated powder.