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.

公开(公告)号：CA2346492A1

公开(公告)日：2000-05-04

申请号：CA2346492

申请日：1999-10-14

Applicant: BASF AG

Inventor： SCHLIWA RUDOLF ,  STUVEN UWE ,  DENTLER JOACHIM ,  KLOTZSCHE HELMUT ,  HERFERT NORBERT

IPC: B01J20/26 ,  B01J20/30 ,  B29B13/06 ,  C08F6/00 ,  C08J3/00 ,  C08J3/12 ,  F26B1/00

Abstract: The present invention relates to a complete drying method for hydrogels, whereby the following steps are carried out successively: a) the hydrogels a re contact dried or dried by convection, b) the hydrogels are pre-crushed, c) t he pre-crushed hydrogels are ground by means of a coarse crushing mill or a crushing roller mill, d) the damp elastic hydrogel particles are separated, e) the damp elastic hydrogel particles are finally dried.

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：DE19849499A1

公开(公告)日：2000-05-04

申请号：DE19849499

申请日：1998-10-27

Applicant: BASF AG

Inventor： DENTLER JOACHIM ,  HERFERT NORBERT ,  KLOTZSCHE HELMUT ,  SCHLIWA RONALD ,  STUEVEN UWE

IPC: B01J20/26 ,  B01J20/30 ,  B29B13/06 ,  C08F6/00 ,  C08J3/00 ,  C08J3/12 ,  F26B1/00

Abstract: The present invention relates to a complete drying method for hydrogels, whereby the following steps are carried out successively: a) the hydrogels are contact dried or dried by convection, b) the hydrogels are pre-crushed, c) the pre-crushed hydrogels are ground by means of a coarse crushing mill or a crushing roller mill, d) the damp elastic hydrogel particles are separated, e) the damp elastic hydrogel particles are finally dried.