Capillary gels formed by spatially progressive polymerization us

Details Capillary gels formed by spatially progressive polymerization us Capillary gels formed by spatially progressive polymerization us

1990-10-26

1992-01-14

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041801, 204299R, C25B 100, C25B 700, B01D 5702, B01D 6142

Patent

active

050807714

ABSTRACT:
Gels are formed in capillary tubes by electrophoretically drawing a charged polymerization initiator into a capillary tube pre-filled with monomer, crosslinking agent and catalyst. The rate of travel of the initiator is slow enough to maintain a sharp leading edge or front, thereby causing polymerization to occur in a progressive manner from one end of the capillary to the other. The shrinkage inherent in the polymerization reaction is thus compensated by fluid movement ahead of the traveling initiator front, and discontinuities in the gel which would otherwise be formed are avoided.

REFERENCES:
patent: 4680201 (1987-07-01), Hjerten
patent: 4863647 (1989-09-01), Baylor, Jr.
patent: 4936974 (1990-06-01), Rose et al.
patent: 4997537 (1991-03-01), Karger et al.

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