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    FOAMS MADE FROM WATER-ABSORBING, BASIC POLYMERS, METHOD FOR THE PRODUCTION AND UTILIZATION THEREOF
    23.
    发明专利
    FOAMS MADE FROM WATER-ABSORBING, BASIC POLYMERS, METHOD FOR THE PRODUCTION AND UTILIZATION THEREOF 未知

    公开(公告)号：AU2003244473A1

    公开(公告)日：2003-09-02

    申请号：AU2003244473

    申请日：2003-01-30

    Applicant: BASF AG

    Inventor： CHAMP SAMANTHA ,  HAHNLE HANS-JOACHIM ,  BECK MARTIN ,  FUNK RUDIGER

    IPC: A61F13/53 ,  A61F13/00 ,  A61F13/15 ,  A61F13/49 ,  A61L15/00 ,  C08J9/12 ,  C08J9/28 ,  C08J9/30 ,  C08K3/00 ,  C08K5/00 ,  C08L101/14

    Abstract: Foams composed of water-absorbing basic polymers, obtainable by (I) foaming a crosslinkable aqueous mixture including (a) at least one basic polymer whose basic groups have optionally been neutralized, (b) at least one crosslinker, (c) at least one surfactant, (d) optionally at least one solubilizer, (e) optionally thickeners, foam stabilizers, fillers, fibers and/or cell nucleators, and (f) optionally particulate water-absorbing acidic polymers, by dissolving a gas which is inert toward free radicals in the crosslinkable aqueous mixture under a pressure from 2 to 400 bar and subsequently decompressing the crosslinkable aqueous mixture to atmospheric or by dispersing fine bubbles of a gas which is inert toward free radicals, and (II) crosslinking the foamed mixture to form a hydrogel foam and if applicable adjusting the water content of the polymer foam to 1-60% by weight. Preparation of the foams by application of the abovementioned measures (I) and (II) and use of the thus obtainable foams in hygiene articles to absorb body fluids, in dressing material to cover wounds, as a sealing material, as a packaging material, as a soil improver, as a soil substitute, to dewater sludges, to absorb aqueous acidic wastes, to thicken waterborne paints or coatings in the course of disposing of residual quantities thereof, to dewater water-containing oils or hydrocarbons or as a material for filters in ventilation systems.

    SECONDARY CROSS-LINKING OF HYDROGELS WITH 2-OXAZOLIDINONES
    27.
    发明专利
    SECONDARY CROSS-LINKING OF HYDROGELS WITH 2-OXAZOLIDINONES 未知

    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.

    CROSS-LINKING OF HYDROGELS WITH PHOSPHORIC ACID ESTERS
    28.
    发明专利
    CROSS-LINKING OF HYDROGELS WITH PHOSPHORIC ACID ESTERS 未知

    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.

    SECONDARY CROSS-LINKING OF HYDROGELS WITH 2-OXAZOLIDINONES
    30.
    发明专利
    SECONDARY CROSS-LINKING OF HYDROGELS WITH 2-OXAZOLIDINONES 未知

    公开(公告)号：MY124251A

    公开(公告)日：2006-06-30

    申请号：MYPI9900614

    申请日：1999-02-22

    Applicant: BASF AG

    Inventor： FUNK RUDIGER ,  FRENZ VOLKER ,  RIEGEL ULRICH ,  WEISMANTEL MARTHIAS ,  ENGELHARDT FRITZ ,  DANIEL THOMAS

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

    Abstract: THE INVENTION RELATES TO A PROCESS FOR THE GEL OR SURFACE POSTCROSSLINKING OF WATER- ABSORBING POLYMERS IN WHICH THE POLYMERS ARE TREATED WITH A SURFACE POSTCROSSLINKING SOLUTION AND DURING OR AFTER THE TREATMENT ARE POSTCROSSLINKED AND DRIED BY MEANS OF AN INCREASE IN TEMPERATURE, THE CROSSLINKER BEING A COMPOUND OF THE FORMULA IN WHICH R1 AND R2 INDEPENDENTLY OF ONE ANOTHER ARE H , HYDROXYL, PHENYL OR C1-C6- ALKYL, R3 IS HYDROGEN. C1-C12- ALKYL , C1-C12- ALKYL, C1-C12- ALKENYL OR C6-C12-ARYL AND R4 AND R5 INDEPENDENTLY OF ONE ANOTHER ARE C1-C12- ALKYL, C1-C12- ALKENYL, C6-C12- ARYL, HYDROXYL, C1-C12- ALKOXY OR HYDROGEN, DISSOLVED IN AN INERT SOLVENT, TO WATER- ABSORBING POLYMERS WHICH CAN BE OBTAINED BY SAID PROCESS, AND TO THEIR USE IN HYGIENE ARTICLES, PACKAGING MATERIALS AND NONWOVENS.

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