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특허 상세정보

Method for the secondary cross-linking of hydrogels with N-acyl-2-oxazolidinones

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) C08F-008/30   
미국특허분류(USC) 525/329.7; 525/329.9; 525/375; 524/556; 524/560; 524/561
출원번호 US-0831920 (2001-05-29)
우선권정보 DE-0054574 (1998-11-26)
국제출원번호 PCT/EP99/08860 (1999-11-18)
국제공개번호 WO00/31152 (2000-06-02)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
인용정보 피인용 횟수 : 83  인용 특허 : 6
초록

Liquid-absorbent polymers are prepared by a process for the gel and/or surface postcrosslinking of water-absorbent polymers by the polymer being treated with a surface postcrosslinking solution and being postcrosslinked and dried during and after the treatment by raising the temperature, wherein the surface postcrosslinking solution comprises as crosslinker a compound of the formula I where R1,R2,R3and R4are independently hydrogen, C1-C12-alkyl, C1-C12-alkenyl, C6-C12-aryl or C1-C12-alkoxy, R5is C1-C16-alkyl, C1-C4-hydroxyalkyl, C6-C12-aryl, C1-C16-...

대표
청구항

1. A process for the gel and/or surface postcrosslinking of a water-absorbent polymer, comprising: treating said water-absorbent polymer with a surface postcrosslinking solution, to obtain a treated water-absorbent polymer; postcrosslinking said treated water-absorbent polymer to obtain a postcrosslinked water-absorbent polymer; and drying said polymer during and after said treating and said crosslinking by raising a temperature; wherein the surface postcrosslinking solution comprises, dissolved in an inert solvent, as crosslinker a compound of for...

이 특허를 인용한 특허 피인용횟수: 83

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