Process for the manufacture of a solid cosmetic composition usin

Details Process for the manufacture of a solid cosmetic composition usin Process for the manufacture of a solid cosmetic composition usin

1994-05-11

1996-04-23

Page, Thurman K.

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Cosmetic, antiperspirant, dentifrice

424 63, 424 64, 514844, A61K 748

Patent

active

055101070

ABSTRACT:
Process for the manufacture of a solid cosmetic composition using plaster of Paris, in which:
a pulverulent mixture (P) consisting of:
1) calcium sulphate hemihydrate (CaSO.sub.4.1/2 H.sub.2 O) in powder form,
2) a hydrophobic fraction (OF) comprising at least one fatty substance and/or at least one pulverulent substance treated by coating or chemical grafting so as to give it hydrophobic properties,
3) a hydrophilic fraction (IF) in powder form, is prepared, the weight proportion IF/OF being between 0.08 and 7.5;
an aqueous phase (AP) in liquid form is prepared;
the pulverulent mixture (P) and the aqueous phase (AP) are headed in a weight proportion P/AP of between 0.2 and 2, so as to obtain a pourable mixture;
the pourable mixture is run into a mould;
it is left to harden by hydration of the calcium sulphate hemihydrate to calcium sulphate dihydrate (CaSO.sub.4.2H.sub.2 O), and the product is removed from the mould.

REFERENCES:
patent: 4128630 (1978-12-01), Hayashi et al.
patent: 4724138 (1988-02-01), Duffy et al.
patent: 4804538 (1989-02-01), Chen
patent: 5049376 (1991-09-01), Murphy et al.
patent: 5049594 (1991-09-01), Jeffs
patent: 5283062 (1994-02-01), Elliott et al.

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