Chemistry: electrical and wave energy – Processes and products
Patent
1991-07-19
1993-05-18
Theisen, Mary Lynn
Chemistry: electrical and wave energy
Processes and products
264113, 264123, B29C 4302
Patent
active
052118924
ABSTRACT:
A new process for manufacturing pharmaceutical or cosmetic compacted powders providing an absorbent or partially friable compacted product, in which a quantity of powder mixture is placed at the bottom of a chamber in which a piston is made to slide in order to exert a compaction pressure on the powder mixture, wherein the powder mixture contains from 5 to 80% by weight of at least one thermoplastic product having a particle size of between 5 and 500 .mu., the remainder being composed of at least one non-thermoplastic product containing from 0.5 to 20% by weight of a binder and, that, whilst pressure is being applied, the powder mixture is subjected to ultrasonic force.
REFERENCES:
patent: 3717427 (1973-02-01), Bodine
patent: 4014965 (1977-03-01), Stube et al.
patent: 4487728 (1984-12-01), Hagen et al.
patent: 4548771 (1985-10-01), Senapati et al.
patent: 4597922 (1986-07-01), Durbin
patent: 4887409 (1989-12-01), Israel et al.
patent: 4943400 (1990-07-01), Hirano et al.
patent: 4957668 (1990-09-01), Plackard et al.
Patent Abstracts of Japan, vol. 7, No. 95 (M-209) [1240], Apr. 21, 1983, p. 99.
"L'Oreal"
Theisen Mary Lynn
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