Catalyst – solid sorbent – or support therefor: product or process – Solid sorbent – Organic
Patent
1995-06-07
1997-09-16
Caldarola, Glenn A.
Catalyst, solid sorbent, or support therefor: product or process
Solid sorbent
Organic
502407, B01J 2026
Patent
active
056680783
ABSTRACT:
The present invention relates to a process for producing improved water-absorbent resin particles comprising the step of treating water-absorbent particles, which are crosslinked polymers of ethylenically unsaturated monomers comprising acrylic acid and/or acrylic acid salt as an essential element, with a modified silicone oil having a functional group which can react with a carboxyl group and/or a carboxylate group in the molecule Improved water-absorbent resin particles obtained by the process have a hygroscopic blocking rate of 20 % or less under a relative humidity of 80 % at 40.degree. C., a dust level of 10 CPM or less and an absorbing characteristic of initial absorbency under load to physiological saline of 20 times or more. The present invention provides water-absorbent resin particles which have an improved hygroscopic blocking rate under high humidity and dust generation rate with a good initial absorbency under load and absorbing capacity.
REFERENCES:
patent: 4755560 (1988-07-01), Ito et al.
patent: 5075373 (1991-12-01), Takemori et al.
Abstract from Derwent Publications Ltd., JP-63-108031, dated 12 May 1988.
Abstract from Derwent Publications Ltd., JP-57-0061775 dated 14 Apr. 1982.
Abstract from Derwent Publications Ltd., JP-63-028977 dated 6 Feb. 1988.
Copy of European Search Report dated Jan. 16, 1996.
Koike Masanori
Sumiya Takashi
Tanaka Kenji
Bullock In Suk
Caldarola Glenn A.
Sanyo Chemical Industries Ltd.
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