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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.
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公开(公告)号：CA2180590A1
公开(公告)日：1997-01-08
申请号：CA2180590
申请日：1996-07-05
Applicant: HOECHST AG
Inventor： ENGELHARDT FRITZ , STUEVEN UWE , DANIEL THOMAS , HERFERT NORBERT
IPC: A61L15/34 , A61L15/60 , C08J3/075 , C08J3/12 , C08J7/04 , C08L1/28 , C08L3/08 , C08L91/06 , C09D123/06 , C09D123/30 , C09D191/06 , C08L101/14 , A61L15/24
Abstract: The present invention relates to hydrophilic, highly swellable hydrogels which are coated with nonreactive, water-insoluble waxes in a quantity of from 0.05 to 2% by weight, based on uncoated hydrogel.
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公开(公告)号：DK0545126T3
公开(公告)日：1996-06-03
申请号：DK92119513
申请日：1992-11-14
Applicant: HOECHST AG
Inventor： STUEVEN UWE , MAYER MANFRED DR , KUSSMAUL ULRICH DR , ENGELHARDT FRIEDRICH DR , RIEGEL ULRICH
IPC: A61L15/00 , A61L15/60 , C08F251/00 , C08F283/06
Abstract: The invention relates to hydrophilic, swellable graft polymers which comprise, in a random distribution, from 0.5 to 50% by weight of radicals of the formula I and radicals of the general formula II from 49 to 99% by weight of acid group-containing radicals of the general formula III and from 0.1 to 2% by weight of radicals of a crosslinking agent which are derived from monomers containing at least two olefinically unsaturated double bonds, where the radicals R to R , X and Y and n and m are defined as indicated in claim 1, to their preparation, and to their use as absorbents for water and aqueous solutions.
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公开(公告)号：DE59205239D1
公开(公告)日：1996-03-14
申请号：DE59205239
申请日：1992-11-14
Applicant: HOECHST AG
Inventor： KUSSMAUL ULRICH DR , STUEVEN UWE , ENGELHARDT FRIEDRICH DR , MAYER MANFRED DR , RIEGEL ULRICH
IPC: A61L15/00 , A61L15/60 , C08F251/00 , C08F283/06
Abstract: The invention relates to hydrophilic, swellable graft polymers which comprise, in a random distribution, from 0.5 to 50% by weight of radicals of the formula I and radicals of the general formula II from 49 to 99% by weight of acid group-containing radicals of the general formula III and from 0.1 to 2% by weight of radicals of a crosslinking agent which are derived from monomers containing at least two olefinically unsaturated double bonds, where the radicals R to R , X and Y and n and m are defined as indicated in claim 1, to their preparation, and to their use as absorbents for water and aqueous solutions.
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公开(公告)号：AT114298T
公开(公告)日：1994-12-15
申请号：AT89118140
申请日：1989-09-30
Applicant: HOECHST AG , HOECHST CELANESE CORP
Inventor： RITTNER SIEGBERT DR , STUEVEN UWE , STEIDL DIETER , SICKMUELLER ALFRED DR , WHEELER LARRY O DR , MOSS GARY L , ZEY EDWARD G DR
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Patent Agency Ranking
公开(公告)号：MX196639B
公开(公告)日：2000-05-24
申请号：MX9602651
申请日：1996-07-05
Applicant: HOECHST AG
Inventor： ENGELHARDT FRITZ , STUEVEN UWE , DANIEL THOMAS , HERFERT NORBERT
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)..
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7.发明专利
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.
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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
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.
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公开(公告)号：DE58908659D1
公开(公告)日：1995-01-05
申请号：DE58908659
申请日：1989-09-30
Applicant: HOECHST AG , HOECHST CELANESE CORP
Inventor： RITTNER SIEGBERT DR , STUEVEN UWE , STEIDL DIETER , SICKMUELLER ALFRED DR , WHEELER LARRY O DR , MOSS GARY L , ZEY EDWARD G DR
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公开(公告)号：DE3671461D1
公开(公告)日：1990-06-28
申请号：DE3671461
申请日：1986-11-28
Applicant: HOECHST AG
Inventor： STUEVEN UWE , SCHMIDT ADOLF DR
IPC: C09K5/04
Abstract: The pair of substances for absorption heat transformers consists of methanol and tetraethylene glycol dimethyl ether.
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