Composite materials comprising water-soluble glass particles

Details Composite materials comprising water-soluble glass particles Composite materials comprising water-soluble glass particles

1982-11-17

1985-05-14

Cannon, James C.

Chemistry: fertilizers

Processes and products

Forms or conditioning

71 65, 71 67, 71 79, 71DIG1, 71904, 424 19, 424 22, 424 23, 424 26, 424 27, 424 28, 424 29, 424 30, 428229, 428241, 428283, 4283055, 4283179, 428372, 428406, 428913, 501 45, 501 47, 501 48, 523122, 523124, 601890, A01N 2526, A61K 926, A61K 952, C05B 1700

Patent

active

045170061

ABSTRACT:
A composite material for the controlled release of an active substrate comprises a relatively insoluble, e.g. polymeric, matrix (11) in which a soluble particulate material (12) is dispersed. When the composite is placed in an aqueous medium dissolution of the particulate material substantially increases the water permeability of the matrix. This effect may be used to provide for the controlled release of an active material into the aqueous medium.

REFERENCES:
patent: 3959556 (1976-05-01), Morrison
patent: 4111922 (1978-09-01), Beede et al.
patent: 4123248 (1978-10-01), Drake
patent: 4343853 (1982-08-01), Morrison
patent: 4349025 (1982-09-01), Drake
patent: 4401712 (1983-08-01), Morrison
patent: 4473545 (1984-09-01), Drake et al.

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