公开(公告)号：JPH09208708A

公开(公告)日：1997-08-12

申请号：JP690697

申请日：1997-01-17

Applicant: HOECHST AG

Inventor： DANIEL THOMAS ,  HERFERT NORBERT ,  REMMEL GUSTAV ,  RIEGEL ULRICH ,  STUVEN UWE ,  ENGELHARDT FRITZ

IPC: C08J3/00 ,  C08J3/075

公开(公告)号：MX9700496A

公开(公告)日：1998-01-31

申请号：MX9700496

申请日：1997-01-17

Applicant: HOECHST AG

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

Abstract: La presente invencion se refiere a un procedimiento para preparar hidrogeles hidrofilos de elevada capacidad de absorcion, mezclando partículas finas de un hidrogel hidrofilo, de elevada capacidad de absorcion, en un hidrogel hidrofilo, de elevada capacidad de absorcion, en forma de gel acuoso, con adicion de agua; caracterizado porque el mezclado se efectua en presencia de un agente tensioactivo.

公开(公告)号：MX9700495A

公开(公告)日：1998-01-31

申请号：MX9700495

申请日：1997-01-17

Applicant: HOECHST AG

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

IPC: C08J3/00 ,  C08J3/075

Abstract: La presente invencion se refiere al uso de agentes tensioactivos para mejorar las propiedades de secado de hidrogeles hidrofilos, de elevada capacidad de absorcion, en el secado con ayuda de secadores de contacto.

公开(公告)号：DE19601764A1

公开(公告)日：1997-07-24

申请号：DE19601764

申请日：1996-01-19

Applicant: HOECHST AG

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

IPC: C08J3/20 ,  C08J3/075 ,  C08J11/06 ,  C08L33/02 ,  C08L41/00 ,  C08L43/00 ,  C08L43/02 ,  C08L51/00 ,  C08L101/00 ,  C08L101/14 ,  C08J3/12 ,  C08K5/04 ,  C08K5/16 ,  C08K5/41 ,  C08L1/26 ,  C08L3/08 ,  C08L5/00 ,  C08L33/00 ,  C08L35/00

公开(公告)号：CA2195374A1

公开(公告)日：1997-07-20

申请号：CA2195374

申请日：1997-01-17

Applicant: HOECHST AG

Inventor： DANIEL THOMAS ,  HERFERT NORBERT ,  REMMEL GUSTAV ,  RIEGEL ULRICH ,  STUVEN UWE ,  ENGELHARDT FRITZ

IPC: C08J3/00 ,  C08J3/075 ,  B01J13/00

Abstract: The present invention relates to the use of surfactants for improving the drying properties of hydrophilic, highly swellable hydrogels in the course of drying with the aid of contact dryers.

公开(公告)号：MX200386B

公开(公告)日：2001-01-09

申请号：MX9700495

申请日：1997-01-17

Applicant: HOECHST AG

Inventor： DANIEL THOMAS ,  HERFERT NORBERT ,  REMMEL GUSTAV ,  RIEGEL ULRICH ,  STUVEN UWE ,  ENGELHARDT FRITZ

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：DE19601763A1

公开(公告)日：1997-07-24

申请号：DE19601763

申请日：1996-01-19

Applicant: HOECHST AG

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

IPC: C08J3/00 ,  C08J3/075 ,  C08J3/12 ,  C08K5/04 ,  C08K5/16 ,  C08K5/41 ,  C08F20/02 ,  B01J13/00

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：CA2195373A1

公开(公告)日：1997-07-20

申请号：CA2195373

申请日：1997-01-17

Applicant: HOECHST AG

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

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

Abstract: The present invention relates to a process for preparing hydrophilic highly swellable hydrogels by mixing fine particles of a hydrophilic highly swellable hydrogel into a hydrophilic highly swellable hydrogel in aqueous gel form with the addition of water, wherein the mixing-in operation is carried out in the presence of a surfactant.