EP 0464023 A4 19920408 - REALEASE ASSIST MICROCAPSULES
Title (en)
REALEASE ASSIST MICROCAPSULES
Publication
Application
Priority
US 24079488 A 19880906
Abstract (en)
[origin: WO9002655A1] The invention is a microcapsule consisting of three components: 1) a shell or wall material layer (4); 2) a core material (3) consiting of an active ingredient; 3) a propellant (2) which is the second core material. The invention is a microcapsule (1) consisting of two core materials, one being an active core ingredient (3) while the other is a propellant (2), both surrounded by an encapsulating shell layer (4). The propellant (2) acts to either explode the capsule (1) or to help accelerate the release of the active core material (3) when the capsule is heated. The capsules have a triggered time release function, caused by heat acting upon the propellant core (2), which then acts to push more of the active ingredient (3) through the wall membrane of the capsule shell, or to explode the capsule from within.
IPC 1-7
B32B 25/00; B32B 27/00; B32B 5/16; B32B 9/02; A61K 9/46; A61K 9/14; A01N 25/00; A61K 9/52; A61L 9/02
IPC 8 full level
A01N 25/28 (2006.01); A61K 9/00 (2006.01); A61K 9/50 (2006.01); B01J 13/02 (2006.01)
CPC (source: EP)
A01N 25/28 (2013.01); A61K 9/0004 (2013.01); A61K 9/50 (2013.01); A61K 9/5031 (2013.01); B01J 13/025 (2013.01)
Citation (search report)
- [X] AU 449371 B2 19740523
- [X] FR 1470725 A 19670224 - KEUFFEL & ESSER CO
- See references of WO 9002655A1
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 9002655 A1 19900322; EP 0464023 A1 19920108; EP 0464023 A4 19920408
DOCDB simple family (application)
US 8903845 W 19890906; EP 89910356 A 19890906