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Process and apparatus for producing microcapsules 実績あり

外国特許コード F110004178
整理番号 Y0144EP4
掲載日 2011年7月12日
出願国 欧州特許庁(EPO)
出願番号 06003619
公報番号 1721658
公報番号 1721658
出願日 平成14年2月13日(2002.2.13)
公報発行日 平成18年11月15日(2006.11.15)
公報発行日 令和2年8月5日(2020.8.5)
国際出願番号 JP2002001186
国際公開番号 WO2000068104
国際出願日 平成14年2月13日(2002.2.13)
国際公開日 平成14年9月6日(2002.9.6)
優先権データ
  • 特願2001-048097 (2001.2.23) JP
  • 特願2001-238624 (2001.8.7) JP
  • 20020700576 (2002.2.13) EP
発明の名称 (英語) Process and apparatus for producing microcapsules 実績あり
発明の概要(英語) The present invention provides a process and apparatus for producing microcapsules. A continuous phase (17) is fed into a first microchannel (12), a shell-forming phase (18) is fed into a second microchannel (13), and a content-forming phase (19) is fed into a third microchannel (14). The second and third microchannels (13,14) join the first microchannel (12), the third microchannel (13) joining the first microchannel (12) at a position downstream of and in the vicinity of the second microchannel (13), such that microcapsules (20) are formed in the continuous phase (17), the microcapsules (20) being formed of the shell-forming phase (18) encapsulating the content-forming phase (19).
従来技術、競合技術の概要(英語) Background Art
Conventionally, apparatuses for producing a microemulsion (containing microspheres) and microcapsules have been used in steps of manufacturing chemicals and some processes have been proposed. There are the following processes (see, for example, PCT Japanese Translation Patent Application Publication No. 8-508933): a process in which a second solution is dropped in a first solution, a process in which a first solution is dropped in the air from the inside portion of a double tube and a second solution is dropped from the outside portion thereof, and so on. Among processes for scattering droplets in the air, there is a process for ejecting droplets using piezoelectric elements used for inkjet printers and so on.
On the other hand, a technique in which monodispersed microdroplets are prepared with laboratory equipment is disclosed in Japanese Unexamined Patent Application Publication No. 2000-84384. However, in this technique, there is a problem in that the rate of preparing such microdroplets is low and the microdroplets cannot be covered with surfactants or microcapsule shells. Furthermore, only microdroplets having a diameter three times larger than the width of microchannels can be prepared. GB-A-2097692 describes a method for combining chemical reagents and to an apparatus for use therein.
EP-A-0512693 describes a process for preparing microcapsules.
EP-A-0964001 describes a process for preparing microencapsulated polymers.
The present invention seeks to provide an improved process and apparatus for producing microcapsules.
According to one aspect of the present invention, there is provided a process for producing microcapsules as defined in claim 1 hereinafter.
According to another aspect of the present invention, there is provided an apparatus for producing microcapsules as defined in claim 2 hereinafter.
特許請求の範囲(英語) [claim1]
1. A process for producing microcapsules comprising the steps of: feeding a continuous phase (17) into a first microchannel (12);
feeding a shell-forming phase (18) into a second microchannel (13), the second microchannel (13) joining the first microchannel (12); and
feeding a content-forming phase (19) into a third microchannel (14), the third microchannel (14) joining the first microchannel (12) at a position downstream of the second microchannel (13) and in the vicinity of the second microchannel (13) such that the shell-forming phase (18) forms a thin layer,
to thereby form microcapsules (20) in the continuous phase (17), the microcapsules (20) being formed of the shell-forming phase (18) encapsulating the content-forming phase (19).

[claim2]
2. An apparatus for producing microcapsules comprising:
(a) a first microchannel (12);
(b) a second microchannel (13) formed so as to join the first microchannel (12);
(c) a third microchannel (14) formed so as to join the first microchannel (12) at a position downstream of the second microchannel (13) and in the vicinity of the second microchannel (13) such that the shell-forming phase (18) forms a thin layer; and
(d) a feed arrangement to feed a continuous phase (17) into the first microchannel (12), a feed arrangement to feed a shell-forming phase (18) into the second microchannel (13), and a feed arrangement to feed a content-forming phase (19) into the third microchannel (14), such that, in use, microcapsules (20) are formed in the continuous phase (17), the microcapsules (20) being formed of the shell-forming phase (18) encapsulating the content-forming phase (19).

[claim3]
3. An apparatus according to claim 2, wherein the a feed arrangement to feed the shell-forming phase (18) and content-forming phase (19) each include a substrate (51), a driven plate (52), an elastic member (53) disposed between the substrate (51)and the driven plate (52), and an actuator (54) for driving the driven plate (52), to thereby feed the shell-forming phase (18) and the content-forming phase (19) at the same time.

[claim4]
4. An apparatus according to claim 2 further comprising films (8) disposed an portions of inner wall surfaces of the first microchannel (12) in which the continuous phase (17) flows and the third microchannel (14) for feeding the content-forming phase (19), for readily forming the microcapsules (20), wherein the portions include the junction point of the flows of the continuous phase (17) and the content-forming phase (19) and the vicinity of the junction point.
  • 出願人(英語)
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • 発明者(英語)
  • HIGUCHI TOSHIRO
  • TORII TORU
  • NISHISAKO TAKASHI
  • TANIGUCHI TOMOHIRO
国際特許分類(IPC)
指定国 Contracting States: CH DE FR GB LI NL SE
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