B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
117/56, 117/45.3
B01J 2/04 (2006.01) A01N 25/28 (2006.01) B01J 13/12 (2006.01) C08L 31/04 (2006.01) C08L 33/06 (2006.01) C08L 25/06 (2006.01)
Patent
CA 1198325
ABSTRACT A method and composition for the in-flight encapsulation of particles such as insecticides, herbi- cides, molluscicides, acaricides, fungicides, nutrients, pheromones, odorants, fragrances, attractants, repel- lents, trace elements, plant regulants, and the like is disclosed. The composition comprises, by weight, from 1 to 40 percent of said particles, from 0.1 to 25 per- cent of a film-forming polymer and from 35 to 99 per- cent of a liquid which renders said polymers soluble or dispersible. Often, other compounds may be added to impart desirable properties such as other film-forming polymers, crosslinking agent film modifying agents, core 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 polymers include various acrylic polymers and inter- polymers of alpha-beta olefinically unsaturated car- boxylic acids and N-methylol acrylic amides, as set forth in U. S. Patent No. 3,007,887. The molecular weight of the polymer generally determines whether the polymer-solvent phase is a solution, a colloidal dis- persion, or an emulsion dispersion. Upon ejection from a spray apparatus and during flight through the inter- vening atmosphere, the solution or dispersion rapidly loses the solvent or carrier liquid component via evaporation, coacervation occurs, and a polymeric mem- brane forms about the particle. Control of the encap- sulated 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.
403078
Cardarelli Nathan F.
Himel Chester M.
Environmental Chemicals Inc.
Ridout & Maybee Llp
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