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    SECONDARY CROSS-LINKING OF HYDROGELS WITH 2-OXAZOLIDINONES
    53.
    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
    54.
    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
    56.
    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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