Impregnated porous granules with slow release pore membranes and

Details Impregnated porous granules with slow release pore membranes and Impregnated porous granules with slow release pore membranes and

1978-05-04

1980-09-16

Van Balen, William J.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

427215, 427220, 428905, 428907, 427221, B32B 1900, C08J 524, C08J 940, C08K 724

Patent

active

042230705

ABSTRACT:
Open-ended pores of a porous granule are filled with a liquid material which is at least partially immiscible with water, and sealed with a porous polyurea membrane which limits the release rate of the material into the surrounding medium. The membrane is formed by

REFERENCES:
patent: 3223518 (1965-12-01), Hansen
patent: 3821135 (1974-06-01), King
patent: 4119565 (1978-10-01), Baatz et al.
patent: 4140516 (1979-02-01), Scher
Cardarelli, Chem. Tech., Aug. 1975, pp. 482+.

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