Powdered superabsorbents, containing silica, their preparation p

Details Powdered superabsorbents, containing silica, their preparation p Powdered superabsorbents, containing silica, their preparation p

1991-06-25

1992-09-15

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524492, 524556, 524847, 524832, 524833, C08K 336, C08L 3302

Patent

active

051479214

ABSTRACT:
Hydrophilic, powdered superabsorbents which are insoluble in water, containing by weight, in the dry state, in combination, from 1 to 45% of colloidal silica with an average diameter of non-agglomerated particles of about 9 to about 50 nanometers and 99 to 55% of a cross-linked polymer based on free acrylic acid, partially or totally salified by a sodium or potassium, preparation process and use notably for the absorption of aqueous fluids.

REFERENCES:
patent: 4499217 (1985-02-01), Yoshimura et al.
WPIL, File Supplier, AN-88=288718, Derwent Publications Ltd.
WPIL, File Supplier, AN-85=253475, Derwent Publications Ltd. Patent Abstracts of Japan, vol. 8, No. 19.

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