Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1980-05-15
1981-08-25
Dixon, Jr., William R.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
252316, 264 4, 264 13, B32B 516, B01J 1300, B29C 600, B29C 1300
Patent
active
042860202
ABSTRACT:
A method and composition for the in-flight encapsulation of particles such as insecticides, herbicides, molluscicides, acaricides, fungicides, nutrients, pheromenes, odorants, fragrances, attractants, repellants, trace elements, and the like. The composition comprises, by weight, from 1 to 40 percent of said particles, from 0.3 to 25 percent of a film-forming polymer and from 35 to 99 percent of a solvent which renders said polymers soluble. Often, other compounds may be added to impart desirable properties such as a second film-forming polymer, crosslinking agents, film modifying agents, and adhesives to improve adhesion to a target. The particle may be in a true solution suspended or emulsified through the action of surfactants and/or emulsifying agents. The film-forming polymer is selected from the class consisting of polyvinyl ethers, polyvinyl acetate, and interpolymers of alpha-beta olefinically unsaturated carboxylic acids and N-methylol acrylic amides, as set forth in U.S. Pat. No. 3,007,887. Upon ejection from a spray apparatus and during flight through the intervening atmosphere, the solution rapidly loses the solvent component via evaporation, coacervation occurs, and a polymeric membrane forms about the particle. Control of the encapsulated particle size can be achieved through selection of the spray system and of the non-volatiles in the spray at the moment of droplet formation.
REFERENCES:
patent: 3007887 (1961-11-01), Essig
patent: 3265629 (1966-08-01), Jensen
patent: 3336155 (1967-08-01), Rowe
patent: 3544500 (1970-12-01), Osmond et al.
patent: 3639306 (1972-02-01), Sternberg et al.
patent: 3806464 (1974-04-01), Matrick et al.
patent: 3830750 (1974-08-01), Wellman
patent: 3872023 (1975-03-01), Baum et al.
patent: 4071653 (1978-01-01), Boessler et al.
patent: 4107071 (1978-08-01), Bayless
patent: 4187194 (1980-02-01), Wellman et al.
patent: 4211668 (1980-07-01), Tate
Cardarelli Nathan F.
Himel Chester M.
Dixon Jr. William R.
Environmental Chemicals, Inc.
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