JPS56115634A - Improved microcapsule - Google Patents

Improved microcapsule

Info

Publication number
JPS56115634A
JPS56115634A JP1739880A JP1739880A JPS56115634A JP S56115634 A JPS56115634 A JP S56115634A JP 1739880 A JP1739880 A JP 1739880A JP 1739880 A JP1739880 A JP 1739880A JP S56115634 A JPS56115634 A JP S56115634A
Authority
JP
Japan
Prior art keywords
soln
aqueous
pressure
microcapsule
deriv
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
JP1739880A
Other languages
Japanese (ja)
Inventor
Hirokazu Tsukahara
Tetsuo Shimazaki
Toshizo Iida
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.)
Mitsubishi Paper Mills Ltd
Original Assignee
Mitsubishi Paper Mills 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 Mitsubishi Paper Mills Ltd filed Critical Mitsubishi Paper Mills Ltd
Priority to JP1739880A priority Critical patent/JPS56115634A/en
Publication of JPS56115634A publication Critical patent/JPS56115634A/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)
  • Color Printing (AREA)
  • Manufacturing Of Micro-Capsules (AREA)

Abstract

PURPOSE:To obtain a microcapsule of improved holding capacity of hydrophobic contents and resistance during handling by causing polycondensation reaction through using melamine, guanamine deriv. and formaldehyde in the presence of anionic polyelectrolyte. CONSTITUTION:Hydrophobic material such as dyes used for no carbon pressure- sensitive copying paper or the like is emulsified and dispersed in an aqueous soln. of anionic polyelectrolyte such as styrene-maleic acid anhydride copolymer. This emulsion is transferred to a reaction apparatus, where it is added with an aqueous precondensate soln. prepd. by dissolving melamine and the guanamine deriv. such as formguanamine expressed by the formula in an aqueous formaldehyde soln. and is stirred under heating, whereby the reaction for capsulation is caused. Thence, its pH is adjusted by adding an aqueous sodium hydroxide soln., whereby the emulsion of the microcapsule is obtained. If these microcapsules are used for no carbon pressure-sensitive copying paper, breakdown efficiency is considerably improved under low impression pressure and writing pressure.
JP1739880A 1980-02-15 1980-02-15 Improved microcapsule Pending JPS56115634A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1739880A JPS56115634A (en) 1980-02-15 1980-02-15 Improved microcapsule

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1739880A JPS56115634A (en) 1980-02-15 1980-02-15 Improved microcapsule

Publications (1)

Publication Number Publication Date
JPS56115634A true JPS56115634A (en) 1981-09-10

Family

ID=11942881

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1739880A Pending JPS56115634A (en) 1980-02-15 1980-02-15 Improved microcapsule

Country Status (1)

Country Link
JP (1) JPS56115634A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60240490A (en) * 1984-05-15 1985-11-29 Mitsubishi Paper Mills Ltd Non-carbon paper
EP0978312A1 (en) * 1998-08-04 2000-02-09 Basf Aktiengesellschaft Microcapsules made of melamine-formaldehyde resins with low formaldehyde content

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5449984A (en) * 1977-09-28 1979-04-19 Mitsubishi Paper Mills Ltd Microcapsule

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5449984A (en) * 1977-09-28 1979-04-19 Mitsubishi Paper Mills Ltd Microcapsule

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60240490A (en) * 1984-05-15 1985-11-29 Mitsubishi Paper Mills Ltd Non-carbon paper
JPH0346315B2 (en) * 1984-05-15 1991-07-15 Mitsubishi Paper Mills Ltd
EP0978312A1 (en) * 1998-08-04 2000-02-09 Basf Aktiengesellschaft Microcapsules made of melamine-formaldehyde resins with low formaldehyde content

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