[특허]Water-absorbing polymer having a high absorption rate

Water-absorbing polymer having a high absorption rate 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B01J-020/28 B01J-020/30 C08F-220/06 A61L-015/42 A61L-015/60 C08F-002/16 B01J-020/18 B01J-020/20 B01J-020/26 C08J-003/12 C08J-003/24 B01J-020/04 C08F-002/44
출원번호	US-0110579 (2012-04-03)
등록번호	US-9737874 (2017-08-22)
우선권정보	DE-10 2011 007 723 (2011-04-20)
국제출원번호	PCT/EP2012/056019 (2012-04-03)
§371/§102 date	20131106 (20131106)
국제공개번호	WO2012/143235 (2012-10-26)
발명자 / 주소	Wattebled, Laurent Loick, Christoph Harren, Jorg Leininger, Stefan
출원인 / 주소	Evonik Degussa GmbH
대리인 / 주소	Lau, Bernard
인용정보	피인용 횟수 : 0 인용 특허 : 38

초록 ▼

A process for producing a water-absorbing polymer composition, comprising the process steps of (i) mixing (α1) 0.1 to 99.999% by weight of ethylenically unsaturated monomers containing acid groups or salts thereof (α2) 0 to 70% by weight of polymerized, ethylenically unsaturated monomers copolymerizable with (α1), (α3) 0.001 to 10% by weight of one or more crosslinkers, (α4) 0 to 30% by weight of water-soluble polymers, and (α5) 0 to 20% by weight of one or more assistants, where the sum of their weights (α1) to (α5) is 100% by weight, (ii) free-radical polymerization with crosslinking to form a water-insoluble aqueous untreated hydrogel polymer, and surface postcrosslinking the ground hydrogel polymer wherein blowing agents having a particle size of 100 μm to 900 μm are added to the aqueous monomer solution prior to the addition of the initiator and the start of the free-radical polymerization.

대표청구항 ▼

1. A process for producing a water-absorbing polymer composition, comprising the process steps of (i) forming an aqueous monomer solution by mixing (α1) from 0.1 to 99.999% by weight, of polymerizable, ethylenically unsaturated monomers containing acid groups or salts thereof or polymerizable, ethylenically unsaturated monomers including a protonated or quaternized nitrogen, or mixtures thereof,(α2) from 0 to 70% by weight of polymerizable, ethylenically unsaturated monomers copolymerizable with (α1),(α3) from 0.001 to 10% by weight of one or more crosslinkers,(α4) from 0 to 30% by weight of water-soluble polymers, and(α5) from 0 to 20% by weight of one or more assistants, where the sum of their weights (α1) to (α5) is 100% by weight,(ii) free-radical polymerization with crosslinking to form a water-insoluble aqueous untreated hydrogel polymer,(iii) drying the hydrogel polymer,(iv) grinding and sieving the water-absorbing polymer,(v) surface postcrosslinking the ground hydrogel polymer of step (iv), and(vi) drying and finishing the water-absorbing polymer,wherein the process in steps i) and ii) is done in a kneading reactor having at least one shaft and not through a reactor employing a poly belt, and wherein granulated blowing agents consisting of soda carbonate particles having a particle size of 100 μm to 900 μm are added to the aqueous monomer solution of part (i) prior to the addition of an initiator and the start of the free-radical polymerization, and wherein the water-absorbing polymer composition has a FSR is in the range from 0.4 to 0.55. 2. The process according to claim 1, wherein iii), a comminution the water-insoluble aqueous untreated hydrogel polymer prior to the drying of the hydrogel polymer. 3. The process according to claim 1 wherein the blowing agents have a preferred particle size of 200 μm to 800 μm. 4. The process according to claim 1, wherein the blowing agent consist of soda carbonate particles having a layer structure. 5. The process according to claim 1 wherein the process steps i) and ii) are effected batchwise or continuously in the kneading reactor. 6. The process according to claim 1 wherein the process steps i) and ii) according to claim 1 are done batchwise in the kneading reactor. 7. The process according to claim 5 wherein the kneading reactor is operated batchwise or continuously with an at least one-shaft system and the granulated blowing agent is incorporated homogeneously in the in the aqueous monomer solution.

이 특허에 인용된 특허 (38)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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Water-absorbing polymer having a high absorption rate 원문보기

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Water-absorbing polymer having a high absorption rate 원문보기

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