Gypsum-based insecticide pellets and method of manufacture

Details Gypsum-based insecticide pellets and method of manufacture Gypsum-based insecticide pellets and method of manufacture

1987-11-25

1990-04-17

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Recycling of reclaimed or purified process material

Of gaseous process material

264109, 264118, 264122, 264333, B29B 908

Patent

active

049178377

ABSTRACT:
A gypsum-based pesticide product and method of manufacture of such product in which the product has a release time for the pesticide which is determined at least in part by its size and in which the gypsum is a solid formed by the bonding of plaster of Paris and water. The product, prior to formation of the solid, includes, by weight, no more than about 20% water, approximately 5% of pesticide, with the balance being plaster of Paris. The ingredients, prior to formation into a solid, are intimately mixed for a time period which is only a fraction of the setting time of the mixture with the amount of water being no greater than that required to completely set the plaster of Paris into gypsum.

REFERENCES:
patent: 3953378 (1976-04-01), Lasser
patent: 4163674 (1979-08-01), Been
patent: 4264543 (1981-04-01), Valenta
patent: 4670039 (1987-06-01), Sjogren
patent: 4732762 (1988-03-01), Sjogren

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