[특허]Water-absorbent agent powders and manufacturing method of the same

Water-absorbent agent powders and manufacturing method of the same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B32B-005/16 C08F-002/16
출원번호	US-0793712 (1997-03-03)
우선권정보	JP-0171895 (1995-07-07)
국제출원번호	PCT/JP96/01863 (1996-07-05)
§371/§102 date	19970303 (19970303)
국제공개번호	WO-9703114 (1997-01-30)
발명자 / 주소	Ishizaki Kunihiko,JPX Nagasuna Kinya,JPX Harada Nobuyuki,JPX
출원인 / 주소	Nippon Shokubai Co., Ltd, JPX
대리인 / 주소	Kubovcik & Kubovcik
인용정보	피인용 횟수 : 32 인용 특허 : 7

초록 ▼

A manufacturing method of water-absorbent agent powders of the present invention is a method of a reducing an amount of a residue of an epoxy crosslinking agent remaining therein by adding a nucleophilic reagent in a form of powder to surface region crosslinked water-absorbent resin powders having a carboxyl group under an applied heat in which the residue of the crosslinking agent remains. Since the method permits an amount of the residue of the crosslinking agent to be reduced by adding a nucleophilic reagent to the heated water-absorbent resin powders, the water-absorbent agent powders exhibiting well-balanced properties which are mutually negatively correlated from one another, i.e., high absorbency under pressure, a reduced amount of a residue of the epoxy crosslinking agent and a high absorbing rate compared with the conventional surface region crosslinked water-absorbent resin powders can be achieved. Such water-absorbent agent powders are suitably used in sanitary materials such as disposable diaper, sanitary napkins, etc.

대표청구항 ▼

[ What is claimed is:] [1.] A manufacturing method of a water-absorbent agent powder from a water-absorbent resin powder having a carboxyl group in which surface regions are crosslinked by a crosslinking agent having an epoxy group, characterized by comprising the step of:adding a nucleophilic reagent to heated said water-absorbent resin powder in a form of powder, and having a residue of the cross-linking agent remaining therein so as to reduce an amount of the residue of the cross-linking agent.

이 특허에 인용된 특허 (7)

Tsubakimoto Tsuneo (Toyonaka JPX) Shimomura Tadao (Toyonaka JPX) Irie Yoshio (Nishinomiya JPX), Absorbent article.
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Takahashi Hitoshi (Himeji JPX) Kakita Hiroyuki (Himeji JPX) Irie Yoshio (Himeji JPX) Fujiwara Teruaki (Nagaokakyo JPX) Akihisa Kazumi (Himeji JPX), Method for continuous agglomeration of an absorbent resin powder and apparatus therefor.
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Nagasuna Kinya (Himeji JPX) Kajikawa Katsuhiro (Himeji JPX) Hatsuda Takumi (Himeji JPX) Irie Yoshio (Himeji JPX) Fujiwara Teruaki (Nagaokakyo JPX), Method for manufacture of an absorbent resin.
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Ueda Shigeki (Aichi JPX) Tanaka Kenji (Shiga JPX), Process for producing improved water absorbing resin and resin made by the same.
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Engelhardt Friedrich (Frankfurt DEX) Schrod Manfred (Weiterstadt DEX) Ziegelmayer Manfred (Bischofsheim DEX) Hilbig Josef (Taunusstein DEX) Dnges Reinhard (Bad Soden DEX), Process for the preparation of a hydrogel which is largely free from monomers.
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Smith Scott J. (Aurora IL) Lind Eric J. (Naperville IL), Superabsorbent polymer having improved absorption rate and absorption under pressure.
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Harada Nobuyuki (Osaka JPX) Wada Katsuyuki (Osaka JPX) Obara Hisanori (Osaka JPX) Shimomura Tadao (Osaka JPX) Sano Yoshinori (Hyogo JPX), Water absorbent matter and method for producing it as well as water absorbent and method for producing it.
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이 특허를 인용한 특허 (32)

Smith,Scott; Messner,Bernfried; Frank,Markus, Absorbing structure having improved blocking properties.
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Hatsuda Takumi,JPX ; Yanase Toru,JPX ; Fujita Yasuhiro,JPX ; Kimura Kazuki,JPX, Method for production of cross-linked polymer.
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Hatsuda Takumi,JPX ; Yanase Toru,JPX ; Fujita Yasuhiro,JPX ; Kimura Kazuki,JPX, Method for production of cross-linked polymer.
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Funk, Rüdiger; Schröder, Jürgen; Pfeiffer, Thomas; Weismantel, Matthias, Method for re-wetting surface post-cross-linked, water-absorbent polymer particles.
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Miyake, Koji; Kitano, Takahiro; Ishizaki, Kunihiko, Method of producing particle-shape water-absorbing resin material.
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Ko, YoungHoon; Kim, EunKyoung, Multi-reactive silicon compound having polyalkyleneglycol substituents and synthetic method thereof.
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Dairoku, Yorimichi; Adachi, Yoshifumi; Nogi, Kozo; Inoue, Hiroki; Wada, Katsuyuki; Irie, Yoshio, Particulate water absorbent agent and production method thereof, and water absorbent article.
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Dairoku,Yorimichi; Adachi,Yoshifumi; Nogi,Kozo; Inoue,Hiroki; Wada,Katsuyuki; Irie,Yoshio, Particulate water absorbent agent and production method thereof, and water absorbent article.
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Kobayashi, Taishi; Imura, Motohiro; Iwamura, Taku; Wada, Katsuyuki; Nogi, Kozo; Mitsukami, Yoshiro; Abe, Masato; Ueda, Hiroko; Honda, Koji, Particulate water absorbent and process for production thereof.
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Kobayashi, Taishi; Imura, Motohiro; Iwamura, Taku; Wada, Katsuyuki; Nogi, Kozo; Mitsukami, Yoshiro; Abe, Masato; Ueda, Hiroko; Honda, Koji, Particulate water absorbent and process for production thereof.
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Adachi,Yoshifumi; Kitano,Takahiro; Fujimaru,Hirotama; Nogi,Kozo, Particulate water absorbent containing water absorbent resin as a main component.
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Fujimaru, Hirotama; Ishizaki, Kunihiko; Nakahara, Sei, Polyacrylic acid (salt) water-absorbent resin, production process thereof, and acrylic acid used in polymerization for production of water-absorbent resin.
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Hinayama, Tetsuhiro; Murakami, Masahiro; Takatori, Junichi, Process for producing water-absorbent resin.
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Funk, Rüdiger; Pfeiffer, Thomas, Process for producing water-absorbing polymer particles.
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Kanzaki, Syuji; Okuda, Sumio; Ishizaki, Kunihiko; Matsumoto, Satoshi, Process for producing water-absorbing resin.
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Kanzaki, Syuji; Okuda, Sumio; Ishizaki, Kunihiko; Matsumoto, Satoshi, Process for producing water-absorbing resin.
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Okuda, Sumio; Ishizaki, Kunihiko; Wada, Katsuyuki, Process for producing water-absorbing resin powder.
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Matsumoto, Yukihiro; Ishizaki, Kunihiko; Kanto, Teruyuki, Production process for water-absorbent resin.
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Matsumoto,Yukihiro; Ishizaki,Kunihiko; Kanto,Teruyuki, Production process for water-absorbent resin.
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Masuda, Yoshihiko; Sasabe, Masazumi; Kato, Seiji; Tachibana, Atsushi; Kadonaga, Kenji; Oka, Shigeru, Waste solution solidifying agent, process for preparing the same and use of the same.
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Nakamura, Masatoshi; Miyake, Koji; Iwamura, Taku; Watanabe, Yusuke, Water-absorbent resin composition, method of manufacturing the same, and absorbent article.
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Dairoku,Yorimichi; Ishizaki,Kunihiko; Hatsuda,Takumi; Hitomi,Kazuhisa; Kajikawa,Katsuhiro; Yamada,Soichi, Water-absorbent resin granule-containing composition and production process for water-absorbent resin granule.
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Yorimichi Dairoku JP; Kunihiko Ishizaki JP; Takumi Hatsuda JP; Kazuhisa Hitomi JP; Katsuhiro Kajikawa JP; Soichi Yamada JP, Water-absorbent resin granule-containing composition and production process for water-absorbent resin granule.
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Ishizaki, Kunihiko; Kanto, Teruyuki; Harada, Nobuyuki; Hatsuda, Takumi; Fujino, Shinichi, Water-absorbent resin powder and production process therefor.
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Torii, Kazushi; Adachi, Yoshifumi; Kobayashi, Taishi; Watanabe, Yusuke; Ikeuchi, Hiroyuki; Kitayama, Toshimasa, Water-absorbing agent and production method thereof.
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Torii,Kazushi; Kitayama,Toshimasa; Harada,Nobuyuki, Water-absorbing agent and production process therefor, and water-absorbent structure.
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Torii,Kazushi; Kitayama,Toshimasa; Harada,Nobuyuki, Water-absorbing agent and production process therefor, and water-absorbent structure.
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Sakamoto, Shigeru; Ikeuchi, Hiroyuki; Machida, Sayaka, Water-absorbing resin and method for manufacturing the same.
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Branham, Kelly D.; Chang, Yihua; Lang, Frederick J.; McBride, Erin; Bunyard, Clay, Water-dispersible, cationic polymers, a method of making same and items using same.
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Branham, Kelly D.; Chang, Yihua; Lang, Frederick J.; McBride, Erin; Bunyard, Clay, Water-dispersible, cationic polymers, a method of making same and items using same.
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Chang, Yihua; Lang, Frederick J.; Wang, Kenneth Y.; Chen, Franklin M.; Branham, Kelly D.; Schick, Kim G.; Schultz, Walter T., Water-dispersible, cationic polymers, a method of making same and items using same.
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Chang,Yihua; Lang,Frederick J.; Branham,Kelly D.; McBride,Erin, Water-dispersible, cationic polymers, a method of making same and items using same.
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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

연합인증

Water-absorbent agent powders and manufacturing method of the same 원문보기