公开(公告)号：BR9908078A

公开(公告)日：2000-10-24

申请号：BR9908078

申请日：1999-02-18

Applicant: BASF AG

Inventor： FUNK RUEDIGER ,  FRENZ VOLKER ,  STUEVEN UWE ,  ENGELHARDT FRITZ ,  DANIEL THOMAS

IPC: A61L15/00 ,  A61L15/60 ,  C07F7/07 ,  C08F8/42 ,  C08G85/00 ,  C08J3/24

公开(公告)号：BR9908006A

公开(公告)日：2000-10-24

申请号：BR9908006

申请日：1999-02-19

Applicant: BASF AG

Inventor： FUNK RUEDIGER ,  FRENZ VOLKER ,  RIEGEL ULRICH ,  WEISMANTEL MATTHIAS ,  ENGELHARDT FRITZ ,  DANIEL THOMAS

IPC: C07D263/20 ,  A61L15/00 ,  A61L15/60 ,  C08F8/30

公开(公告)号：CA2347897A1

公开(公告)日：2000-06-02

申请号：CA2347897

申请日：1999-11-23

Applicant: BASF AG

Inventor： DANIEL THOMAS ,  WEISMANTEL MATTHIAS ,  ENGELHARDT FRITZ ,  RIEGEL ULRICH ,  FRENZ VOLKER

IPC: A61F13/53 ,  A61F5/44 ,  A61F13/15 ,  A61F13/49 ,  A61L15/00 ,  C08F8/30 ,  C08J3/24 ,  C08K5/357 ,  C08L101/00

Abstract: The invention relates to a method for the secondary cross-linking of gels or surfaces of water-absorbing polymers by treating the polymer with a surface secondary cross-linking agent and subsequently subjecting it to a secondary cross-linking reaction during or after the treatment by raising the temperature and drying the polymer. According to the invention, the cross- linking agent is a compound of formula (I), wherein R1 is hydrogen, C1-C4 alkyl, C1-C4 hydroxyalkyl, trialkylsilyl or acetyl and R2, R2', R3, R3', R4, R4' independently is hydrogen, C1-C12 alkyl, C2-C12 alkenyl or C6-C12 aryl, dissolved in an inert solvent. The invention also relates to the liquid- absorbing polymers obtained by said method, to their use in hygiene items, packaging material and nonwovens.

公开(公告)号：DE19807504A1

公开(公告)日：1999-08-26

申请号：DE19807504

申请日：1998-02-21

Applicant: BASF AG

Inventor： FUNK RUEDIGER ,  FRENZ VOLKER ,  STUEVEN UWE ,  ENGELHARDT FRITZ ,  DANIEL THOMAS

IPC: A61L15/00 ,  A61L15/60 ,  C07F7/07 ,  C08F8/42 ,  C08G85/00 ,  C08J3/24

Abstract: 1,4,6,9-Tetraoxa-5-silaspiro(4.4)nonanes (diglycol silicates) (I) are used as crosslinking agents for surface crosslinking of particles of superabsorbing polymer. 1,4,6,9-Tetraoxa-5-silaspiro(4.4)nonanes (diglycol silicates) of formula (I) are used as crosslinking agents for surface crosslinking of particles of superabsorbing polymer: R, R' = hydrogen (H) or 1-6 carbon (C) alkyl. An Independent claim is also included for surface-crosslinked superabsorbing polymer produced in this way.

公开(公告)号：CA2320778A1

公开(公告)日：1999-08-26

申请号：CA2320778

申请日：1999-02-19

Applicant: BASF AG

Inventor： WEISMANTEL MATTHIAS ,  ENGELHARDT FRIEDRICH ,  DANIEL THOMAS ,  RIEGEL ULRICH ,  FRENZ VOLKER ,  FUNK RUDIGER

IPC: C07D263/20 ,  A61L15/00 ,  A61L15/60 ,  C08F8/30

Abstract: The invention relates to a method for the gel-phase or surface secondary crosslinking of water-absorbent polymers, characterized in that the polymer is treated with a solution for surface secondary cross-linking, during or after treatment undergoes secondary cross-linking by temperature elevation and is then dried. Dissolved in an inert solvent the cross-linking agent contains a compound of formula (I), where R1 and R2 independently of each other are H, hydroxy, phenyl or C1-C6-alkyl, R3 is hydrogen, C1-C12-alkyl, C1-C12-alkenyl or C6-C12-aryl and R4 and R5 independently of each other are C1-C12-alkyl, C1C12-alkenyl, C6-C12-aryl, hydroxy, C1-C12-alkoxy or hydrogen. The invention also relates to water-absorbent polymers obtained according to the above method, and to their use in hygiene articles, packaging materials and nonwoven materials.

公开(公告)号：CA2319457A1

公开(公告)日：1999-08-26

申请号：CA2319457

申请日：1999-02-19

Applicant: BASF AG

Inventor： FRENZ VOLKER ,  FUNK RUDIGER ,  ENGELHARDT FRIEDRICH ,  STUVEN UWE ,  DANIEL THOMAS

IPC: A61L15/00 ,  A61L15/60 ,  C08F8/40 ,  C08J3/24 ,  D06M15/263

Abstract: The invention relates to a method for the surface secondary cross-linking of water-absorbent polymers, according to which the polymer is sprayed with a solution for surface secondary cross-linking. As cross-linking agent said solution contains phosphoric acid esters of the formula (1) or (2), where X is OH or NH2 and R is C1-C12 alkylene, or a mixture of such esters dissolved in an inert solvent. The moist product during or after spraying is subjected to secondary cross-linking and dried by raising the temperature to 50-250 ~C. The invention also relates to water-absorbent polymers obtainable in accordance with the above method and to their use in hygiene articles, packing materials and non-woven materials.