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US 4,542,176 AGranted
Preparation of particulate gels
AssigneeNational Research Development Corporation
InventorNeil B. Graham
Life of this patent
Estimating the term…
Abstract
A process for the preparation of a particulate gel, which process comprises (i) contacting the gel with a swelling agent and (ii) subjecting the swollen gel to shear stress such that the swollen gel is comminuted to particles.
Claims11
A process for the preparation of a particulate hydrogel of a homo-or copolymer which can exhibit syneresis, which process comprises:
- (i) contacting the hydrogel with a swelling agent;
- (ii) subjecting the swollen hydrogel to shear stress such that the swollen hydrogel is comminuted to particles;
- and
- (iii) drying the swollen particulate hydrogel by varying its temperature so that it exhibits syneresis.
1 more element
Dependencies are inferred from the claim text.