B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
167/321, 117/45,
B01J 13/02 (2006.01) A01N 25/00 (2006.01) A01N 25/28 (2006.01) B01J 13/12 (2006.01) C08L 31/04 (2006.01) C08L 33/06 (2006.01)
Patent
CA 1154189
ABSTRACT OF THE DISCLOSURE A method and composition for the in-flight encapsula- tion or particles such as insecticides, herbicides, mollusci- cides, acaricides, fungicides, nutrients, pheromenes, odorants, fragrances, attractants, repellants, trace elements, and the like. The composition comprises, by weight, from 1 to 40 per- cent 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 poly- mer, 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 sur- factants 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, a- set forth in U. S. Patent 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.
329395
Cardarelli Nathan F.
Himel Chester M.
Cardarelli Nathan F.
Environmental Chemicals Inc.
Himel Chester M.
Ridout & Maybee Llp
University Of Georgia
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