Rapidly dissolving, water-soluble polymers and spray drying meth

Details Rapidly dissolving, water-soluble polymers and spray drying meth Rapidly dissolving, water-soluble polymers and spray drying meth

1975-06-30

1977-07-12

Ziegler, J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25B, 260 25H, 260 25L, 264 13, C08J 900

Patent

active

040353176

ABSTRACT:
A free-flowing particle mixture of a water-soluble polymer wherein the particles are (1) no smaller than about 325 mesh, (2) at least 50% thereof are larger than about 120 mesh and (3) none are larger than about 20 mesh, said mixture containing no more than about 12% volatiles and said particles comprising hollow, porous structures having at least one opening in their walls, the walls comprising small adhering aggregates of the same compositions and a method for producing such a mixture comprising spraying a water-in-oil emulsion of said polymer, using a specific type and orifice-size nozzle, into a gas stream at an outlet gas temperature of at least about 212.degree. F. and at a dryer residence time of at least about 40 seconds.

REFERENCES:
patent: RE27444 (1972-07-01), Zimmerstrasse
patent: 2202481 (1940-05-01), Cox et al.
patent: 3172867 (1965-03-01), Showalter
patent: 3826771 (1974-07-01), Anderson et al.
patent: 3896196 (1975-07-01), Dickey et al.

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