Coating particulate material with a polymer film

Details Coating particulate material with a polymer film Coating particulate material with a polymer film

1993-05-10

1995-04-11

Lovering, Richard D.

Coating processes

Particles, flakes, or granules coated or encapsulated

Solid encapsulation process utilizing an emulsion or...

42721334, 427214, 427221, 428406, 512 4, 524494, 524589, B01J 1318, B01J 1320, B05D 700

Patent

active

054056489

ABSTRACT:
Solid particles are coated with a polymer coating, by a process that includes, dispersing the uncoated particles in water, containing a wetting agent, adding a liquid polymer coupling agent, so that the dispersed solid particles have a film of the coupling agent, and agitating the mixture while adding a prepolymer. The coupling agent is reacted with the polymer to form polymer coatings on the dispersed particles. Relatively thin polymer coatings can be achieved by this process. As an extension of the process, the core particles can be materials used for abrasive blast cleaning, filtration, separation catalysis, animal feed, drug dispensing, contacting, tumble cleaning, and slow release of active ingredients.

REFERENCES:
patent: 3175935 (1965-03-01), Vanstrum
patent: 3384680 (1968-05-01), Lussow
patent: 3837892 (1974-09-01), Marzocchi
patent: 3891572 (1975-06-01), Moody et al.
patent: 3956230 (1976-05-01), Gaylord
patent: 4333743 (1982-06-01), Nojima
patent: 4415630 (1983-11-01), Kubota et al.
patent: 4438239 (1984-03-01), Rembaum et al.
patent: 4608277 (1986-08-01), Greiner et al.
patent: 4659753 (1987-04-01), Tiburtius et al.

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