JPS5551431A - Manufacture of microcapsule - Google Patents

Manufacture of microcapsule

Info

Publication number
JPS5551431A
JPS5551431A JP12560178A JP12560178A JPS5551431A JP S5551431 A JPS5551431 A JP S5551431A JP 12560178 A JP12560178 A JP 12560178A JP 12560178 A JP12560178 A JP 12560178A JP S5551431 A JPS5551431 A JP S5551431A
Authority
JP
Japan
Prior art keywords
gum arabic
melamine
solution
microcapsule
phase
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP12560178A
Other languages
Japanese (ja)
Inventor
Masaki Kiritani
Yoshiyuki Hoshi
Takayuki Hayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP12560178A priority Critical patent/JPS5551431A/en
Publication of JPS5551431A publication Critical patent/JPS5551431A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/02—Making microcapsules or microballoons
    • B01J13/06—Making microcapsules or microballoons by phase separation
    • B01J13/14—Polymerisation; cross-linking
    • B01J13/18—In situ polymerisation with all reactants being present in the same phase

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Color Printing (AREA)

Abstract

PURPOSE:To obtain microcapsule which does not adhere to reactor from a high concentration but low viscosity of a capsule solution consisting of malamine and a formaldehyde resin, together with gum arabic and an ammonium salt. CONSTITUTION:Melamine and a formabldehyde resin in a formaldehyde resin/ melamine molal ratio=approx. 2-3 are dissolved in an aqueous solution of gum arabic, containing gum arabic in a gum arabic/melamine ratio=approx. 0.1-4 by weight. The aqueous gum arabic solution so obtained is heated with stirring to separate the melamine-formaldehyde polymer as a liquid solution phase, and then the particles of a core substance, e.g., natural mineral oil, an animal oil, etc., are enclosed by the liquid solution phase and the polycondensation reaction of the liquid sooution phase is continued to form an insoluble capsule wall. The polycondensation reaction is accelerated by the addition of an ammonium salt, e.g., ammonium chloride, etc. This method is most useful in the manufacture of microcapsule for pressure-sensitive recording papers, and can provide a 2-8 micron size of capsules from an enriched but low viscosity capsule solution at lower cost without the use of an exoensive high-molecular electrolyte, as in the conventional methods.
JP12560178A 1978-10-12 1978-10-12 Manufacture of microcapsule Pending JPS5551431A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12560178A JPS5551431A (en) 1978-10-12 1978-10-12 Manufacture of microcapsule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12560178A JPS5551431A (en) 1978-10-12 1978-10-12 Manufacture of microcapsule

Publications (1)

Publication Number Publication Date
JPS5551431A true JPS5551431A (en) 1980-04-15

Family

ID=14914166

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12560178A Pending JPS5551431A (en) 1978-10-12 1978-10-12 Manufacture of microcapsule

Country Status (1)

Country Link
JP (1) JPS5551431A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5772891A (en) * 1980-10-23 1982-05-07 Mitsubishi Paper Mills Ltd Pressure sensitive copy paper
JPS60238140A (en) * 1984-05-14 1985-11-27 Daio Seishi Kk Preparation of microcapsule
US4670344A (en) * 1980-08-20 1987-06-02 Kureha Kagaku Kogyo Kabushiki Kaisha Microcapsule for pressure-sensitive recording paper and process of preparing same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4670344A (en) * 1980-08-20 1987-06-02 Kureha Kagaku Kogyo Kabushiki Kaisha Microcapsule for pressure-sensitive recording paper and process of preparing same
JPS5772891A (en) * 1980-10-23 1982-05-07 Mitsubishi Paper Mills Ltd Pressure sensitive copy paper
JPS60238140A (en) * 1984-05-14 1985-11-27 Daio Seishi Kk Preparation of microcapsule

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