EP 1350556 A1 20031008 - Multiple emulsions
Title (en)
Multiple emulsions
Title (de)
Mehrfachemulsionen
Title (fr)
Emulsions multiples
Publication
Application
Priority
DE 10211313 A 20020314
Abstract (en)
A multiple emulsion has polar phase A1, non polar phase B, and polar phase A2, or non polar phase B1, polar phase A, and non polar phase B2. The emulsion further comprises a coalescence stability amount of particulate solid having mean particle size smaller than 1 microm. A multiple emulsion has polar phase A1, non polar phase B, and polar phase A2, or non polar phase B1, polar phase A, and non polar phase B2. The emulsion further comprises a coalescence stability amount of particulate solid having mean particle size smaller than 1 microm. It is provided that surface-active substances are present only up to maximum concentration less than 0.1 times critical micelle concentration of the substances in phases A, A1, A2. Independent claims are also included for: (1) a method of producing (A1/B/A2) multiple emulsion comprising dispersing particulate solids in B phase to form a dispersion, dispersing this dispersion in A1 phase to form an emulsion, and dispersing the emulsion in A2 phase containing particulate solids; (2) a method of producing (B1/A/B2) multiple emulsion comprising dispersing particulate solids in B1 phase to form a dispersion, dispersing this dispersion in A phase to form an emulsion, and dispersing the emulsion in B2 phase containing particulate solids; and (3) a process for controlled release of active ingredients into surrounding area comprising incorporating the active ingredient into dispersed A1/B phase of A1/B/A2 multiple emulsion, or into a dispersed B1/A phase of B1/A/B2 emulsion.
Abstract (de)
Mehrfachemulsion, die aus einer polaren Phase A1, einer unpolaren Phase B und einer polaren Phase A2 oder einer unpolaren Phase B1, einer polaren Phase A und einer unpolaren Phase B2 besteht, dadurch gekennzeichnet, dass sie Partikelförmige Feststoffe, die kleiner 1 µm sind, enthält, mit der Maßgabe, dass oberflächenaktive Substanzen nur bis zu einer maximalen Konzentration von kleiner als 0,1 mal der kritischen Micellkonzentration der oberflächenaktiven Substanzen in Phase A, A1, A2 enthalten sind.
IPC 1-7
IPC 8 full level
A61K 8/06 (2006.01); A61K 8/19 (2006.01); A61K 8/25 (2006.01); A61K 9/113 (2006.01); A61K 47/04 (2006.01); B01F 3/08 (2006.01); B01F 3/12 (2006.01); B01F 23/47 (2022.01); B01J 13/00 (2006.01)
CPC (source: EP US)
B01F 23/4105 (2022.01 - EP US); B01F 23/4144 (2022.01 - EP); B01F 23/4144 (2022.01 - US); B01F 23/4146 (2022.01 - EP US)
Citation (search report)
- [XA] GB 1152607 A 19690521 - PFIZER LTD
- [X] WO 9907463 A1 19990218 - CENTRE NAT RECH SCIENT [FR], et al
- [X] WO 0037045 A2 20000629 - MAINE BIOLOG LAB INC [US]
- [XA] EP 0782846 A2 19970709 - SHISEIDO CO LTD [JP]
- [XA] EP 0836847 A2 19980422 - LANCASTER GROUP GMBH [DE]
- [XA] EP 0780112 A1 19970625 - BEIERSDORF AG [DE]
- [A] EP 0892035 A1 19990120 - INTEVEP SA [VE]
- [A] EP 0529396 A1 19930303 - BEIERSDORF AG [DE]
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
EP 1350556 A1 20031008; EP 1350556 B1 20040908; CN 1306990 C 20070328; CN 1449862 A 20031022; DE 10211313 A1 20031002; DE 50300067 D1 20041014; JP 2003311144 A 20031105; JP 4473514 B2 20100602; PL 359056 A1 20030922; US 2003175317 A1 20030918; US 7722891 B2 20100525
DOCDB simple family (application)
EP 03004297 A 20030227; CN 03119979 A 20030314; DE 10211313 A 20020314; DE 50300067 T 20030227; JP 2003068515 A 20030313; PL 35905603 A 20030307; US 37681103 A 20030228