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특허 상세정보

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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 특허에 인용된 특허 (6)

  1. Tsubakimoto Tsuneo (Toyonaka JPX) Shimomura Tadao (Toyonaka JPX) Irie Yoshio (Nishinomiya JPX). Absorbent article. USP1987054666983.
  2. Gross James R. (Lake Jackson TX). Absorbent articles made from carboxylic polyelectrolyte solutions containing bis-oxazoline crosslinker and methods for t. USP1977114056502.
  3. Funk Rudiger,DEX ; Herfert Norbert,DEX ; Wanior Mariola,DEX ; Brown Patricia D. ; Engelhardt Fritz ; Woodrum Guy T.. Crosslinked, hydrophilic, highly swellable hydrogels, production thereof and use thereof. USP2001106297335.
  4. Engelhardt Friedrich (Frankfurt am Main DEX) Funk Rdiger (Wiesbaden-Naurod DEX) Riegel Ulrich (Frankfurt am Main DEX) Ebert Gerlinde (Dreieich DEX) Kleiner Hanss-Jerg (Kronberg DEX). Hydrophilic, highly swellable hydrogels. USP1994075331059.
  5. Friedrich Engelhardt DE; Volker Frenz DE; Norbert Herfert DE; Ulrich Riegel DE; Matthias Weismantel DE; Wilfried Heide DE. Mechanically stable hydrogel-forming polymers. USP2002076414214.
  6. Graham Andrew T. (Midland MI). Process for preparing a water-absorbent polymer. USP1995015385983.

이 특허를 인용한 특허 피인용횟수: 83

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