Microcapsule powder

Details Microcapsule powder Microcapsule powder

2006-06-27

2006-06-27

Pak, John (Department: 1616)

Drug, bio-affecting and body treating compositions

Preparations characterized by special physical form

Particulate form

C424S417000, C424S451000, C424S455000, C424S457000, C424S489000, C424S497000, C424S498000, C424S604000, C514S938000, C514S951000, C514S963000, C514S965000, C514S492000

Reexamination Certificate

active

07067153

ABSTRACT:
A process for making hydrophobicized powders of micro- and/or nanocapsules involving the steps of: (a) providing an aqueous polymer solution containing at least one active ingredient and at least one hydrophilic polymer; (b) providing an oil component heated to a temperature above a gel point of the aqueous polymer solution; (c) dispersing (a) in (b) in the presence of a water-in-oil emulsifier to form a dispersion; (d) cooling the dispersion to a temperature below the gel point of the aqueous polymer solution to form micro- and/or nanocapsules containing the active ingredient encapsulated therein; (e) harvesting the micro- and/or nanocapsules from the dispersion; and (f) contacting the micro- and/or nanocapsules with an oil-absorbing auxiliary ingredient.

REFERENCES:
patent: 4164563 (1979-08-01), Chang
patent: 4652441 (1987-03-01), Okada et al.
patent: 5356617 (1994-10-01), Schlossman
patent: 5705169 (1998-01-01), Stein et al.
patent: 5730960 (1998-03-01), Stein et al.
patent: 5780056 (1998-07-01), Akamatsu et al.
patent: 5945091 (1999-08-01), Habeck et al.
patent: 5948417 (1999-09-01), Mori
patent: 5962663 (1999-10-01), Wachter et al.
patent: 6001382 (1999-12-01), Levy
patent: 6193960 (2001-02-01), Metzger et al.
patent: 2003/0180235 (2003-09-01), Grisoni et al.
patent: 41 22 591 (1991-07-01), None
patent: 44 42 987 (1996-06-01), None
patent: 195 37 001 (1997-03-01), None
patent: 197 12 978 (1997-10-01), None
patent: 197 12 033 (1998-09-01), None
patent: 198 45 246 (1999-06-01), None
patent: 0 622 451 (1994-11-01), None
patent: 0 659 403 (1995-06-01), None
patent: 0 693 471 (1996-01-01), None
patent: 0 694 521 (1996-01-01), None
patent: 0 818 450 (1998-01-01), None
patent: 99 122 906 (1999-11-01), None
patent: 1 064 910 (2001-01-01), None
patent: 1 101 527 (2001-05-01), None
patent: 2 701 266 (1994-08-01), None
patent: 2 775 441 (1999-09-01), None
J.Falbe, “Surfactants in Consumer Products”, Springer Verlag, Berlin, (1987), pp. 54-124.
J.Falbe, “Katalysatoren, Tenside und Mineralöladditive” (Catalysts, Surfactants and Mineral Oil Addivites), Thieme Verlag, Stuttgart, (1978), pp. 123-217.
P.Finkel, “Formulierung kosmetischer Sonnenschutzmittel”, SÖFW-Journal, 122, (1996), pp. 543-546 & 548.
“Kosmetische Färbemittel”, Farbstoffkommission der Deutschen Forschungsgemeinschaft, Verlag Chemie, Weinheim, (1984), pp. 81-106.
“Ullmann's Encyclopedia of Industrial Chemistry”, 5thEd., vol. A6, Weinheim, Verlag Chemie, (1986), pp. 231-332.
Gesslein et al., “Chitosan, a gift from the sea”, HAPPI, vol. 27, (Oct. 1990), pp. 57 & 59.
O.Skaugrud, “Chitosan—New Biopolymer For Cosmetics & Drugs”, Drug Cosm. Ind., vol. 148, (May, 1991), pp. 24, 26 & 30.
Onsoyen, et al., “Adding Benefits to Cosmetic Formulations by Tailormade Chitosans”, Seifen-Öle-Fette-Wachse, vol. 117, (1991), pp. 633-637.
Sannan, et al., “Studies on Chitin, 2*”, Markromol. Chem., vol. 177, (1976), pp. 3589-3600.

Affiliated with

Also associated with

Rating

Microcapsule powder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microcapsule powder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microcapsule powder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3631224