Pulverulent, crosslinked polymers which absorb aqueous liquids and blood
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08F-008/42
C08F-020/06
출원번호
US-0379510
(2003-03-04)
우선권정보
DE-0043706 (2000-09-04)
발명자
/ 주소
Mertens, Richard
Jö
rg, Harren
출원인 / 주소
Stockhausen GmbH & Co. KG
대리인 / 주소
Smith Moore LLP
인용정보
피인용 횟수 :
43인용 특허 :
8
초록▼
The invention relates to absorptive, crosslinked polymers which are based on partly neutralized, monoethylenically unsaturated monomers carrying acid groups, and have improved properties, in particular in respect of their capacity for transportation of liquids in the swollen state, and which have be
The invention relates to absorptive, crosslinked polymers which are based on partly neutralized, monoethylenically unsaturated monomers carrying acid groups, and have improved properties, in particular in respect of their capacity for transportation of liquids in the swollen state, and which have been after-crosslinked on their surface at temperatures of at least 150° C. with a combination of polyol as after-crosslinking compound and a cation in the form of an aqueous solution.
대표청구항▼
1. Pulverulent polymer which is after-crosslinked on the surface, absorbs water, aqueous or serous liquids and bloods and comprises froma) 55-99.9% wt. % of polymerized, ethylenically unsaturated monomers which contain acid groups and are neutralized to the extent of at least 25 mol %,b) 0-40 wt. %
1. Pulverulent polymer which is after-crosslinked on the surface, absorbs water, aqueous or serous liquids and bloods and comprises froma) 55-99.9% wt. % of polymerized, ethylenically unsaturated monomers which contain acid groups and are neutralized to the extent of at least 25 mol %,b) 0-40 wt. % of polymerized, ethylencially unsaturated monomers which can be copolymerized with a),c) 0.1-5.0 wt. % of one or more polymerized-in crosslinking agents,d) 0-30 wt. % of a water-soluble polymer the sum of the amounts by weight of a) to d) being 100 wt. %, wherein the polymer has been coated withe) 0.01 to 5 wt. %, based on the polymer, of at least one polyol as an agent for after-crosslinking of the surface in an aqueous solution; andf) 0.001-1.0 wt. %, based on the polymer, of a cation in the form of a salt dissolved in an aqueous solution and has been heated to an after-crosslinking temperature in the range of at least 150 to 250° C., the weight ratio of the salt to the polyol being in the range from 1:0.8 to 1:4 and the total amount of aqueous solutions having been 0.5 to 10 wt. %, based on the polymer, excluding crosslinked partly neutralized polyacrylic acids which have been treated with Al 2 (SO 4 ) 3 and glycerol in a weight ratio of 1:1 or with Al 2 (SO 4 ) 3 16H O and polyethylene glycol in a weight ration of 1:1.8 or with Al 2 (SO 4 ) 3 ·14H 2 O and ethylene glycol in a weight ratio of 1:2 or with Al 2 (SO 4 ) 3 ·18H 2 O and ethylene glycol in a weight ratio of 1:2 or Al 2 (SO 4 ) 3 19 18H 2 O and propylene glycol in a weight ratio of 1:1.6. 2. Polymer according to claim 1 wherein component e) is employed in an amount of 0.1 to 2.5 wt. %, 0.5 to 1.5 wt. %, and component f) is employed in an amount of 0.005 to 0.5 wt. %. 3. Polymer according to claim 1 wherein the weight ratio of salt to polyol is in the range from 1:1 to 1:3.5. 4. Polymer according to claim 1 wherein only water has been employed as the solvent for components e) and f). 5. Polymer according to claim 1 wherein components e) and f) have been employed together in an aqueous solution. 6. Polymer according to claim 1 wherein the total amount of water of the aqueous solutions added separately or together was 0.75 to 5 wt. %, based on the polymer. 7. Polymer according to claim 1 wherein as component f), the cation originates from an alkali metal or alkaline earth metal salt, a salt of zinc, iron, aluminum, titanium or another transition metal salt or from a double salt of two different cations or a mixture of the salts, preferably an inorganic, water-soluble aluminum salt. 8. Polymer according to claim 1 wherein C 2 -C 8 -alkylene diols, C 2 -C 8 -alkylene triols, hydroxy compounds of higher functionality and/or di- and polyalkylene glycols have been employed as the polyols. 9. Polymer according to claim 1 wherein the after-crosslinking has been carried out at temperatures of 160° C. to 220° C. 10. Polymer according to claim 1 wherein at least 50 wt. % of the acid groups of the monomer units a) are carboxyl groups. 11. Polymer according to claim 1 wherein the monomer units a) are derived from acrylic acid and/or methacrylic acid. 12. Polymer according to claim 1 wherein starch and/or polyvinyl alcohol or derivatives thereof have been employed as component d). 13. Polymer according to claim 1 wherein the polymer has a retention (TB) of at least 26 g/g at a permeability (SFC) of up to 70·10 −7 cm 3 sec/g. 14. Polymer according to claim 1 wherein the polymer has a retention (TB) of at least 25 g/g at a permeability (SFC) of >70·10 −7 to 150·10−7 cm 3 sec/g. 15. Polymer according to claim 13 wherein the polymer has an absorption of liquid under pressure (AAP 0.7) of at least 18 g/g. 16. Process for the preparation of absorbent polymers according to claim 1 wherein a mixture ofa) 55-99.9 wt. % of ethylenically unsaturated monomers which carry acid groups and are neutralized to the extent of at least 25 mol %,b) 0-40 wt. % of ethylencially unsaturated monomers which can be copolymerized with a),c) 0.1-5.0 wt. % of one or more crosslinking compounds,d) 0-30 wt. % of a water-soluble polymer the sum of components a) to d) being 100 wt. %, is subjected to polymerization and the product is optionally comminuted, dried, pulverized and sieved, and in that the polymer powder is treated withe) 0.01 to 5 wt. %, based on the polymer, of at least one polyol as an agent for after-crosslinking of the surface in the form of an aqueous solution and withf) 0.001-1.0 wt. %, based on the polymer, of a cation of a salt dissolved in an aqueous solution,the total amount of water being 0.5-10 wt. %, based on the polymer, and the weight ratio of salt to polyol being in the range from 1:0.8 to 1:4, wherein an intensive mixing of the aqueous solutions, present together or separately, of components e) and f) with the polymer powder is carried out simultaneously or successively and thermal after-crosslinking of the polymer powder is carried out by subsequent heating to >150° C. to 250° C. 17. Process according to claim 16 wherein the polymer powder employed for the after-crosslinking has a residual moisture content of 0.5 to 25 wt. %. 18. Process according to claim 16 wherein the polymer powder employed has a particle size of <3,000 μm. 19. Process according to claim 16 wherein the aqueous solutions of components e) and f) are heated up to 20° C. to 100° C. 20. Process according to claim 16 wherein the after-crosslinking is carried out at temperatures of 160° to 220° C. 21. Use of the polymers according to one of claim 1 as absorbents for water or aqueous liquids, preferably in constructions for absorption of body fluids, in foamed and non-foamed sheet-like structures, in packaging materials, in constructions for plant growing, as soil improvement agents or as active compound carriers. 22. Use of the polymers according to claim 1 as the predominant or sole absorbent in absorbent inserts.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (8)
Goldman Stephen Allen (Wyoming OH) Haynes Nancy Ann (Okeana OH) Mansfield Todd Leon (Cincinnati OH) Plischke Manfred (Steinbach DEX) Retzsch Herbert Louis (Cincinnati OH) Walker Trevor (Cincinnati OH, Absorbent members for body fluids having good wet integrity and relatively high concentrations of hydrogel-forming absor.
Obayashi Shigeji (Akashi JPX) Nakamura Morio (Kakogawa JPX) Fujiki Koichi (Kakogawa JPX) Yamamoto Takushi (Kobe JPX), Alkali metal acrylate or ammonium acrylate polymer excellent in salt solution-absorbency and process for producing same.
Dahmen Kurt (Mnchengladbach-Rheydt DEX) Mertens Richard (Krefeld DEX), Aqueous-liquid and blood-absorbing powdery reticulated polymers, process for producing the same and their use as absorbe.
Ganslaw Stuart H. (Piscataway NJ) Katz Howard G. (East Windsor NJ), Surface treatment process for improving dispersibility of an absorbent composition, and product thereof.
Laursen Henning (Aarhus DKX) Mosgaard John (Risskov DKX) Nielson Otto V. (Aarhus CT DKX) Poland Clark L. (New Canaan CT), System for producing an air laid web.
Fricker, Daniel; Gartner, Herbert; Hager, Marc; Harren, Jorg; Kohler, Hans-Peter; Plöchinger, Harald, Continuous process for the production of a superabsorbent polymer.
Fricker, Daniel; Gartner, Herbert; Hager, Marc; Harren, Jörg; Kohler, Hans-Peter; Plöchinger, Harald, Continuous process for the production of a superabsorbent polymer.
Tian, Gonglu; Ondisco, Matthew Thomas; Bergman, David L.; Messner, Bernfried; Smith, Scott J., Particulate superabsorbent polymer composition having improved stability.
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.
Fricker, Daniel; Gartner, Herbert; Hager, Marc; Harren, Jörg; Kohler, Hans-Peter; Plöchinger, Harald, Process for the production of a superabsorbent polymer.
Fricker, Daniel; Gartner, Herbert; Hager, Marc; Harren, Jörg; Kohler, Hans-Peter; Plöchinger, Harald, Process for the production of a superabsorbent polymer.
Gartner, Herbert; Harren, Jorg; Hager, Marc; Plochinger, Harald; Fricker, Daniel; Kohler, Hans-Peter; Auernig, Sabine, Process for the production of a superabsorbent polymer.
Gartner, Herbert; Harren, Jorg; Hager, Marc; Plochinger, Harald; Fricker, Daniel; Kohler, Hans-Peter; Auernig, Sabine, Process for the production of a superabsorbent polymer.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.