Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Patent
1976-12-03
1978-09-05
Hamrock, William F.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
260 23R, 528480, 528491, 528499, C08F 612
Patent
active
041122143
ABSTRACT:
The process of preparing powder particles having a desired particle shape, comprising the steps of: providing a paint solution having a film-forming portion and a first solvent portion, forming droplets containing the film-forming portion and the solvent portion, by contacting the paint solution with a second solvent which is partially miscible with the first solvent and in which the film-forming portion is non-soluble, the second solvent being substantially saturated with the first solvent, diluting said droplets with a sufficient quantity of a third solvent which is at least partially miscible with the first solvent and in which the film-forming portion precipitates as powder particles, and controlling the shape of the powder particles by regulating the dilution of the first solvent in the droplets.
REFERENCES:
patent: 2379237 (1945-06-01), Jenkins
patent: 2722528 (1955-11-01), Johnson
patent: 3737401 (1973-06-01), Tsou et al.
patent: 3772252 (1973-11-01), Blunt
Grow Chemical Corp.
Hamrock William F.
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