[특허]Superabsorbent polymers comprising direct covalent bonds between polymer chain segments and methods of making them

Superabsorbent polymers comprising direct covalent bonds between polymer chain segments and methods of making them 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C08J-003/20 A61L-015/60 C08J-003/24 C08J-003/28
출원번호	US-0059941 (2005-02-17)
등록번호	US-9125965 (2015-09-08)
우선권정보	EP-04004132 (2004-02-24); EP-04017070 (2004-07-20)
발명자 / 주소	Flohr, Andreas
출원인 / 주소	The Procter & Gamble Company
대리인 / 주소	Mueller, Andrew J.
인용정보	피인용 횟수 : 0 인용 특허 : 24

초록 ▼

The present invention relates to superabsorbent polymer particles with improved cross-linking and their use in absorbent articles. Superabsorbent polymers of the invention comprise polymer chain segments, wherein at least a part of these polymer chain segments are cross-linked to each other through

대표청구항 ▼

1. Superabsorbent polymer comprising polymer chains comprising polymer chain segments, wherein at least a part of said polymer chain segments are cross-linked to each other only through direct covalent bonds between said polymer chain segments wherein said direct covalent bonds do not comprise intermediate atoms including atoms comprised by a cross-linking molecule, and are formed between a carbon atom in the backbone of a first polymer chain and a carbon atom of a second polymer chain, wherein the polymer chain segments are a) the part of the polymer chains located between two neighboring, existing cross-links or b) the part of the polymer chains between sites wherein the polymer chain is branched, and wherein said superabsorbent polymer is formed into a superabsorbent polymer particle comprising a surface and a core and wherein said covalent bonds formed directly between said polymer chain segments are formed on the surface of said superabsorbent particles whereas said core is substantially free of said covalent bonds, and wherein said polymer chain segments are block copolymer segments. 2. Superabsorbent polymer according to claim 1, wherein said polymer chain segments comprise polycarboxylic acid units and wherein said covalent bonds are formed directly between said polycarboxylic acid units of said polymer chain segments. 3. Superabsorbent polymer according to claim 2, wherein said polycarboxylic acrylic acid units are selected from the group consisting of polyacrylic acid units, polymethacrylic acid units and combinations thereof. 4. Superabsorbent polymer according to claim 2, wherein said polycarboxylic acid units are at least partially neutralized. 5. Superabsorbent polymer according to claim 1, wherein said superabsorbent polymer is formed into a superabsorbent polymer particle and wherein the direct covalent bonds are solely formed intraparticulate. 6. Superabsorbent polymer according to claim 1, wherein said covalent bonds are induced by electromagnetic irradiation without the use of any radiation activatable radical formers.

이 특허에 인용된 특허 (24)

Tsubakimoto Tsuneo (Toyonaka JPX) Shimomura Tadao (Toyonaka JPX) Irie Yoshio (Nishinomiya JPX), Absorbent article.
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DesMarais Thomas A. (Norwood OH) Stone Keith J. (Fairfield OH) Thompson Hugh A. (Fairfield OH) Young Gerald A. (Cincinnati OH) LaVon Gary D. (Harrison OH) Dyer John C. (Cincinnati OH), Absorbent foam materials for aqueous body fluids and absorbent articles containing such materials.
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Wang Lin,JPX ; Rezai Ebrahim,JPX ; Hayashi Yumiko,JPX ; Cho Eui-Boo,JPX, Absorbent material having improved absorbent permeability and methods for making the same.
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Herron Carlisle M. (Memphis TN) Cooper David J. (Memphis TN), Absorbent structure containing individualized, polycarboxylic acid crosslinked wood pulp cellulose fibers.
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Nguyen Hien V. (East Windsor NJ) Boardman Franklin (Englishtown NJ), Acrylate superabsorbent polymerization process.
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Pacifici James G. (Kingsport TN) Wang Richard H. S. (Kingsport TN) Newland Gordon C. (Kingsport TN), Benzophenone initiators for the photopolymerization of unsaturated compounds.
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Roe Donald C. (West Chester OH), Disposable absorbent article for low-viscosity fecal material.
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Young Gerald A. (Cincinnati OH) LaVon Gary D. (Harrison OH) Taylor Gregory W. (Springdale OH), High efficiency absorbent articles for incontinence management.
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Kimura Kazumasa (Ikoma JPX) Hatsuda Takumi (Himeji JPX) Nagasuna Kinya (Himeji JPX), Method for treating the surface of an absorbent resin.
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Bruggemann Helmut,DEX ; Gunther Uwe,DEX ; Klimmek Helmut,DEX, Polymer composition, absorbent composition, their production and use.
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Phalangas Charalambos J. (Princeton Junction NJ), Polymerization of water soluble monomers with radiation and chemical initiator.
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Messner, Bernfried; Hsu, Whei-Neen; Agne, Robert, Polymers that are cross-linkable to form superabsorbent polymers.
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Mauz Otto (Liederbach DEX), Preparation of polymer based on polyvinylene carbonate and/or polyhydroxymethylene.
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Aoki ; Shuzo ; Yamasaki ; Harumasa, Process for preparation of spontaneously-crosslinked alkali metal acrylate polymers.
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Nambu Hiromi,JPX ; Umada Akira,JPX ; Watanabe Yoshihiko,JPX ; Igarashi Tadashi,JPX ; Amiya Takayuki,JPX, Process for producing improved super absorbent polymer.
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Yoneda Yoshiyuki (Kawasaki JPX) Tsuji Kazuto (Kawasaki JPX), Semiconductor device in a resin package housed in a frame having high thermal conductivity.
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LaVon Gary D. (Harrison OH) Young Gerald A. (Cincinnati OH) Taylor Gregory W. (West Chester OH) Roe Donald C. (West Chester OH) Andes William S. (Springfield OH), Slitted absorbent members for aqueous body fluids formed of expandable absorbent materials.
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Wilson, Larry R., Superabsorbent polymers having a slow rate of absorption.
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Flohr,Andreas, Superabsorbent polymers having radiation activatable surface cross-linkers and method of making them.
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Dyer John C. (Cincinnati OH) DesMarais Thomas A. (Cincinnati OH) LaVon Gary D. (Harrison OH) Stone Keith J. (Fairfield OH) Taylor Gregory W. (West Chester OH) Young Gerald A. (Cincinnati OH), Thin-unit-wet absorbent foam materials for aqueous body fluids and process for making same.
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Westerman Ira John (Strongsville OH), Water absorbent polymers comprising unsaturated carboxylic acid, acrylic ester containing alkyl group 10-30 carbon atoms.
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Tsubakimoto Tsuneo (Toyonaka JPX) Shimomura Tadao (Toyonaka JPX) Irie Yoshio (Nishinomiya JPX) Masuda Yoshihiko (Suita JPX) Kimura Kazumasa (Osaka JPX) Hatsuda Takumi (Suita JPX), Water absorbing agent.
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Masuda ; Fusayoshi ; Nishida ; Kazuo ; Nakamura ; Akira, Water absorbing starch resins.
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Sumiya Takashi,JPX ; Koike Masami,JPX ; Fujiura Yoji,JPX ; Nomoto Mihoko,JPX, Water-absorbent or water-retention material and production method thereof.
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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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Superabsorbent polymers comprising direct covalent bonds between polymer chain segments and methods of making them 원문보기

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Superabsorbent polymers comprising direct covalent bonds between polymer chain segments and methods of making them 원문보기

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