EP 0791002 A4 19981007 - ANIONIC POLYMER
Title (en)
ANIONIC POLYMER
Title (de)
ANIONISCHES POLYMER
Title (fr)
POLYMERE ANIONIQUE
Publication
Application
Priority
- IT TO940892 A 19941110
- US 9514729 W 19951113
Abstract (en)
[origin: WO9615137A1] The invention relates to an anionic polysaccharide having superabsorbent characteristics, its polysaccharide being substituted by sulphate groups and the polysaccharide being cross-linked to a sufficient extent that it remains insoluble in water. The polysaccharide is preferably cellulose. The anionic polysaccharide can be made by a process which comprises (i) reacting a polysaccharide with a pyridine -SO3 complex in a solvent; followed by (ii) reacting with a cross-linking agent to provide a degree of cross-linking sufficient that the product remains insoluble in water. The sulphated polysaccharides show superabsorbent properties largely independent of pH over a wide range and can be used in applications where it is desired to absorb salt containing aqueous liquids, for example in diapers and catamenials.
IPC 1-7
IPC 8 full level
A61L 15/28 (2006.01); A61L 15/60 (2006.01); C08B 5/10 (2006.01); C08B 5/14 (2006.01); C08B 3/22 (2006.01); C08B 15/00 (2006.01)
CPC (source: EP KR)
A61L 15/28 (2013.01 - EP); A61L 15/60 (2013.01 - EP); C07H 5/04 (2013.01 - KR); C07H 5/08 (2013.01 - KR); C08B 5/14 (2013.01 - EP KR); C08B 15/005 (2013.01 - EP KR)
C-Set (source: EP)
Citation (search report)
- [A] US 3737406 A 19730605 - D ALELIO G
- [X] CHEMICAL ABSTRACTS, vol. 120, no. 24, 13 June 1994, Columbus, Ohio, US; abstract no. 301351d, ARAI KENICHIRO ET AL.: "Crosslinked sodium cellulose sulfate as a highly absorbent material." page 136; XP002073006 & SEN'I GAKKAISHI, vol. 49, no. 9, 1993, pages 482 - 485
- [A] PATENT ABSTRACTS OF JAPAN vol. 5, no. 152 (C - 73) 25 September 1981 (1981-09-25) & DATABASE WPI Week 8135, Derwent World Patents Index; AN 63016D
- See also references of WO 9615137A1
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU NL PT SE
DOCDB simple family (publication)
WO 9615137 A1 19960523; AU 4156496 A 19960606; CA 2204889 A1 19960523; EP 0791002 A1 19970827; EP 0791002 A4 19981007; IT 1267497 B1 19970205; IT TO940892 A0 19941110; IT TO940892 A1 19960510; JP H10509754 A 19980922; KR 970707137 A 19971201; MX 9703448 A 19980731
DOCDB simple family (application)
US 9514729 W 19951113; AU 4156496 A 19951113; CA 2204889 A 19951113; EP 95939920 A 19951113; IT TO940892 A 19941110; JP 51625796 A 19951113; KR 19970703147 A 19970510; MX 9703448 A 19970509