Process for preparing emulsions that are polymerizable to absorb

Details Process for preparing emulsions that are polymerizable to absorb Process for preparing emulsions that are polymerizable to absorb

1992-08-27

1993-03-30

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 61, 521 64, 521146, 521149, 521150, 524801, 524804, C08J 926, C08J 928

Patent

active

051984725

ABSTRACT:
Disclosed is a process for the continuous preparation of high internal phase emulsions which are suitable for subsequent polymerization into polymeric foam materials that, upon dewatering, act as absorbents for aqueous body fluids. The process involves continuous introduction of a certain type of monomer-containing oil phase and a certain type of electrolyte-containing water phase into a dynamic mixing zone at relatively low water to oil phase ratios. Flow rates are then steadily adjusted to increase the water to oil ratio of the streams fed to the dynamic mixing zone while subjecting the dynamic mixing zone contents to shear agitation which is sufficient to thereby form a high internal phase emulsion that, upon subsequent polymerization, provides a foam having an average cell size of from about 5 to 100 microns. The formation of such a stable high internal phase emulsion is completed by feeding the contents of the dynamic mixing zone to and through a static mixing zone.

REFERENCES:
patent: 3255127 (1966-06-01), von Bonin
patent: 3565817 (1971-02-01), Lissant
patent: 3734867 (1973-05-01), Will
patent: 3763056 (1973-10-01), Will
patent: 3988508 (1976-10-01), Lissant
patent: 4473611 (1984-09-01), Hag
patent: 4522953 (1985-06-01), Barby et al.
patent: 4612334 (1986-09-01), Jones et al.
patent: 4659564 (1987-04-01), Cox et al.
patent: 4668709 (1987-05-01), Jones et al.
patent: 4788225 (1988-11-01), Edwards et al.
patent: 4797310 (1989-01-01), Barby et al.
patent: 4839395 (1989-06-01), Masamizu et al.
Lissant et al., "Structure of High Internal Phase Ratio Emulsions", Jour. of Colloid and Interface Science, vol. 47, No. 2, May, 1974.
Lissant et al., "A Study of Medium and High Internal Phase Ratio Water/Polymer Emulsions", Journal of Colloid & Interface Science, vol. 42, No. 1, Jan., 1973.
Lissant, "The Geometry of High-Internal Phase Ratio Emulsions," Journal of Colloid and Interface Science, vol. 22, 462-468 (1966).

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