Title:
SURFACE-TREATED SUPERABSORBENT POLYMER PARTICLES
Document Type and Number:
WIPO Patent Application WO2001091815
Kind Code:
A3
Abstract:
Surface-crosslinked superabsorbent polymer particles are obtained by treating 100 parts by weight of superabsorbent polymer particles with about 0.001 to about 10 parts by weight of an oxazolinium ion. The oxazolinium ion can be formed in situ by heating superabsorbent particles treated with an oxazolinium ion precursor, such as a hydroxyalkylamide. A stable oxazolinium ion also can be used to surface crosslink the SAP particle. Surface crosslinking the superabsorbent polymer particles with an oxazolinium ion increases both the rate of liquid absorption and the quantity of liquid absorbed and retained by the superabsorbent particles.
Inventors:
MITCHELL MICHAEL A
ECKERT DAVID
TOMLIN ANTHONY S
ECKERT DAVID
TOMLIN ANTHONY S
Application Number:
PCT/IB2001/001057
Publication Date:
June 20, 2002
Filing Date:
May 03, 2001
Export Citation:
Assignee:
BASF AG (DE)
International Classes:
A61F5/44; A61F13/53; A61L15/20; A61L15/42; A61L15/60; C08F8/30; C08J3/12; C08J3/24; C08K5/19; C08L101/14; (IPC1-7): B01J20/26; A61L15/60; C08F8/30; C08J3/24
Domestic Patent References:
| WO1999042494A1 | 1999-08-26 | |||
| WO1999025393A2 | 1999-05-27 |
Foreign References:
| US6239230B1 | 2001-05-29 | |||
| EP0937739A2 | 1999-08-25 | |||
| US4076917A | 1978-02-28 | |||
| EP0999238A1 | 2000-05-10 |
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