IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0565050
(2004-07-07)
|
등록번호 |
US-7754822
(2010-08-02)
|
우선권정보 |
DE-103 34 584(2003-07-28) |
국제출원번호 |
PCT/EP2004/007398
(2004-07-07)
|
§371/§102 date |
20060215
(20060215)
|
국제공개번호 |
WO05/019279
(2005-03-03)
|
발명자
/ 주소 |
- Daniel, Thomas
- Riegel, Ulrich
- Elliott, Mark
- von Oehsen, Ubbo
- Exner, Kai Michael
- Massonne, Klemens
|
출원인 / 주소 |
|
대리인 / 주소 |
Marshall, Gerstein & Borun LLP
|
인용정보 |
피인용 횟수 :
40 인용 특허 :
12 |
초록
▼
A process for postcrosslinking a water-absorbing polymer comprises said polymer being treated with a postcrosslinker and, during or after said treating, being postcrosslinked and dried by temperature elevation, said postcrosslinker being a compound of the formula I where R1, R2, R3, R4, R5, R6,
A process for postcrosslinking a water-absorbing polymer comprises said polymer being treated with a postcrosslinker and, during or after said treating, being postcrosslinked and dried by temperature elevation, said postcrosslinker being a compound of the formula I where R1, R2, R3, R4, R5, R6, R7, R8 and R9 are each independently hydrogen, C1-C12-alkyl, C2-C12-alkenyl or C6-C12-aryl, wherein C1-C12-alkyl, C2-C12-alkenyl or C6-C12-aryl may be halogen substituted. The liquid-absorbing polymers are useful in hygiene articles and packaging materials.
대표청구항
▼
We claim: 1. A process for postcrosslinking a water-absorbing polymer, which process comprises treating said polymer with a postcrosslinker and, during or after said treating, postcrosslinking and drying by temperature elevation, said postcrosslinker being a compound of a formula (I) wherein R1,
We claim: 1. A process for postcrosslinking a water-absorbing polymer, which process comprises treating said polymer with a postcrosslinker and, during or after said treating, postcrosslinking and drying by temperature elevation, said postcrosslinker being a compound of a formula (I) wherein R1, R2, R3, R4, R5, R6, R7, R8, and R9 are each independently hydrogen, C1-C12-alkyl, C2-C12-alkenyl, or C6-C12-aryl, wherein C1-C12-alkyl, C2-C12-alkenyl, or C6-C12-aryl may be halogen substituted. 2. The process of claim 1 wherein said postcrosslinker is of the formula (I) wherein R1 is C1-C6-alkyl, C2-C6-alkenyl, or C6-C7-aryl, R2, R4, R6, and R8 are each independently hydrogen, and R3, R5, R7, and R9 are each independently hydrogen, C1-C4-alkyl, or C2-C4-alkenyl, wherein C1-C4-alkyl or C2-C4-alkenyl may be fluorine substituted. 3. The process of claim 1 wherein said postcrosslinker is 1-aza-4,6-dioxabicyclo[3.3.0]octane. 4. The process of claim 1 wherein said polymer to be postcrosslinked (a) contains structural units derived from acrylic acid or acrylic esters or (b) is obtained by graft copolymerization of acrylic acid or acrylic esters onto a water-soluble polymeric matrix. 5. The process of claim 1 wherein said postcrosslinker is a surface postcrosslinker which is used as a solution in an inert solvent. 6. The process of claim 5 wherein said inert solvent comprises an aqueous solution of glycerol, methanol, ethanol, isopropanol, ethylene glycol, 1,2-propanediol, 1,3-propanediol, or mixtures thereof. 7. The process of claim 5 wherein said inert solvent is water or a mixture of water with a mono- or a polyfunctional alcohol which has an alcohol content in the range from 10% to 90% by weight. 8. The process of claim 1 wherein said postcrosslinker is used in an amount from 0.01% to 5% by weight, based on the weight of said polymer. 9. A water-absorbing polymer prepared by the process of claim 1. 10. A water-absorbing polymer of claim 8 characterized by an absorbency under load (AUL) at 0.7 psi (4830 Pa) of at least 15 g/g. 11. A hygiene article comprising a water-absorbing polymer prepared by the process of claim 1. 12. A packaging material comprising a water-absorbing polymer prepared by the process of claim 1.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.