Method and device for determining the swelling behavior of...

Details Method and device for determining the swelling behavior of... Method and device for determining the swelling behavior of...

2007-03-13

2007-03-13

Sines, Brian (Department: 1743)

Chemistry: analytical and immunological testing

Optical result

With claimed manipulation of container to effect reaction or...

C436S148000, C436S164000, C436S165000, C436S168000, C422S050000, C422S051000, C422S051000, C422S068100, C422S069000, C422S082050, C422S091000, C356S027000, C356S028000, C073S001010, C073S073000, C604S358000, C604S368000, C604S369000, C604S372000, C502S400000, C502S401000, C502S402000

Reexamination Certificate

active

10399492

ABSTRACT:
Disclosed is a method for determining the swellability and the swelling kinetics of superabsorbent material (9) such as polymer gels, for example, which comprises introducing a defined volume of the dry superabsorbent material (9) into a measuring vessel (7), using a movable element (4) within said measuring vessel (7) to apply a restraining force (12) to said superabsorbent material (9) and capturing the expansion of said superabsorbent material (9) contactlessly within a chamber (14) in a continuous manner by capturing the change in height of a piston (4) which bounds said chamber (14), travels in a measuring vessel (7) and is marked with a height scale (6).

REFERENCES:
patent: 5206205 (1993-04-01), Tsai
patent: 5562646 (1996-10-01), Goldman et al.
patent: 6121509 (2000-09-01), Ashraf et al.
patent: 6232520 (2001-05-01), Hird et al.
patent: 4442009 (1995-06-01), None
patent: 339461 (1989-11-01), None
patent: 530517 (1993-03-01), None
Lim et al.,European Polymer Journal, 38, 2002, 579-586.

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