Absorbing structure having improved blocking properties
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08F-008/30
C08F-008/00
출원번호
US-0766399
(2007-06-21)
등록번호
US-7427650
(2008-09-23)
우선권정보
DE-100 53 858(2000-10-30)
발명자
/ 주소
Smith,Scott
Messner,Bernfried
Frank,Markus
출원인 / 주소
Stockhausen GmbH
대리인 / 주소
Smith Moore Leatherwood LLP
인용정보
피인용 횟수 :
28인용 특허 :
18
초록▼
A process for producing an absorbing polymer structure (Pa) including the steps of obtaining a treated absorbing polymer structure (Pb) by increasing the absorption under load at a load of 0.3 or 0.9 psi (AUL) compared to an untreated absorbing polymer structure (Pu) by a first treatment of an outer
A process for producing an absorbing polymer structure (Pa) including the steps of obtaining a treated absorbing polymer structure (Pb) by increasing the absorption under load at a load of 0.3 or 0.9 psi (AUL) compared to an untreated absorbing polymer structure (Pu) by a first treatment of an outer region of the untreated absorbing polymer structure (Pu) and reducing the AUL compared to the treated polymer structure (Pb) by a second treatment of an outer region of the treated absorbing polymer structure (Pb). Such absorbing polymer structure (Pa) may be used in a composite and may be used in foams, moulded articles, fibers, sheets, films, cables, sealing materials, liquid-absorbing hygiene articles, carriers for plant growth-regulating and fungal growth-regulating agents, packaging materials and soil additives or building materials.
대표청구항▼
What is claimed: 1. An absorbing polymer composition (Pa) obtained by a process comprising the following steps: preparing an absorbing polymer comprising the step of polymerizing (α1) 0.1 to 99.999 wt. % of polymerized, ethylenically unsaturated, acid group-containing monomers or their salts,
What is claimed: 1. An absorbing polymer composition (Pa) obtained by a process comprising the following steps: preparing an absorbing polymer comprising the step of polymerizing (α1) 0.1 to 99.999 wt. % of polymerized, ethylenically unsaturated, acid group-containing monomers or their salts, or polymerized, ethylenically unsaturated monomers containing a protonated or quaternated nitrogen atom, or their mixtures; and (α2) 0.001 to 10 wt% of a crosslinking agent, resulting in an untreated dried absorbing polymer structure (Pu) having an outer region and an absorption under load (AUL) at a load of 0.3 psi (AUL0.3), and an absorption under load at a load of 0.9 psi (AUL0.9), and having a centrifuge retention capacity (CRC) of from 10 to 100 g/g; preparing a treated absorbing polymer structure (Pb) comprising the steps of treating the outer region of the untreated absorbing polymer structure (Pu) wherein the (AUL0.3) is increased to at least 25 g/g, and the (AUL0.9) is increased to at least 18 g/g; and further treating the outer surface of the treated absorbing polymer structure (Pb) to make the absorbing polymer composition (Pa) with a coating agent to reduce the (AUL0.3) and the (AUL0.9) values of the treated polymer structure (Pb). 2. An absorbing polymer structure (Pa) comprising: an untreated dried absorbing polymer structure (Pu) comprising the step of polymerizing (α1) 0.1 to 99.999 wt. % of polymerized, ethylenically unsaturated, acid group-containing monomers or their salts, or polymerized, ethylenically unsaturated monomers containing a protonated or quatemated nitrogen atom, or their mixtures; and (α2) 0.001 to 10 wt. % of a crosslinking agent, wherein said untreated dried absorbing polymer structure (Pu) has an outer region and an absorption under load (AUL) at a load of 0.3 psi (AUL0.3), and an absorption under load at a load of 0.9 psi (AUL0.9), and having a centrifuge retention capacity (CRC) of from 10 to 100 g/g; preparing a treated absorbing polymer structure (Pb) comprising the steps of treating the outer region of the untreated absorbing polymer structure (Pu) wherein the (AUL0.3) is increased to at least 25 g/g, and the (AUL0.9) is increased to at least 18 g/g; and further treating the outer surface of the treated absorbing polymer structure (Pb) with a coating agent to reduce the (AUL0.3), and the (AUL0.9) values of the treated polymer structure (Pb), wherein the treated polymer structure (Pb) has at least one of the following properties: (β1) a CRC of at least 10 g/g, (β2) an AUL at a load of 0.3 psi of at least 15 g/g, (β3) an AUL at a load of 0.9 psi of at least 8 g/g, (β4) a gel stability in the region of at least 100 sec. at a first measurement before a warming-up and at least 15 sec. at a second measurement after the warming-up, or (β5) a penetration of at most 15 cm after 2 hours or at most 20 cm after 24 hours, or (β6) a swelling pressure of at least 400 g, 3. The absorbing polymer structure (Pa) according to claim 2 wherein the absorbing polymer structure (Pa) has an AUL at a load of 0.3 psi of less than 27 g/g and a swelling pressure of at least 400 g. 4. composite comprising: a substrate; and an absorbing polymer structure (Pa) according to claim 3. 5. A process for the production of a composite comprising the steps of bringing in contact with one another an absorbing polymer structure (Pa) of claim 3, and a substrate, and optionally an auxiliary substance. 6. Foams, moulded articles, fibers, sheets, films, cables, sealing materials, liquid-absorbing hygiene articles, carriers for plant growth-regulating and fungal growth-regulating agents, packaging materials, soil additives or building materials comprising an absorbing polymer structure (Pa) according to claim 3.
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이 특허에 인용된 특허 (18)
Tan Erol ; Abitz Peter R. ; Chinai Kays, Absorbent material for use in absorbent articles.
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Marciano-Agostinelli Fabrizio (Short Hills NJ) Barbaro-Forleo Marco (Short Hills NJ), Filling compound for multi-wire conductor of an electrical cable and cables including such compound.
Brandt Kerryn A. (Cincinnati OH) Goldman Stephen A. (Wyoming OH) Inglin Thomas A. (West Chester OH), Hydrogel-forming polymer compositions for use in absorbent structures.
Hansen Michael R. (Seattle WA) Young ; Sr. Richard H. (Federal Way WA), Wet laid fiber sheet manufacturing with reactivatable binders for binding particles to fibers.
Tian, Gonglu; Ondisco, Matthew Thomas; Bergman, David L.; Messner, Bernfried; Smith, Scott J., Particulate superabsorbent polymer composition having improved stability.
Gartner, Herbert; Harren, Jorg; Hager, Marc; Plochinger, Harald; Fricker, Daniel; Kohler, Hans-Peter; Auernig, Sabine, Process for the production of a superabsorbent polymer.
Azad, Michael M.; Smith, Scott J.; Joy, Mark; Blake, Geoffrey Wyatt; Jarman, Michael S., Superabsorbent polymer containing clay particulate, and method of making same.
Azad, Michael M.; Smith, Scott J.; Joy, Mark; Blake, Geoffrey Wyatt; Jarman, Michael S., Superabsorbent polymer containing clay, particulate, and method of making same.
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