JPS5518218A - Removal of excess formaldehyde in dispersion liquid having microcapsule dispersed therein - Google Patents

Removal of excess formaldehyde in dispersion liquid having microcapsule dispersed therein

Info

Publication number
JPS5518218A
JPS5518218A JP8999478A JP8999478A JPS5518218A JP S5518218 A JPS5518218 A JP S5518218A JP 8999478 A JP8999478 A JP 8999478A JP 8999478 A JP8999478 A JP 8999478A JP S5518218 A JPS5518218 A JP S5518218A
Authority
JP
Japan
Prior art keywords
formaldehyde
removal
dispersion liquid
saccharides
urea
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.)
Granted
Application number
JP8999478A
Other languages
Japanese (ja)
Other versions
JPS6228694B2 (en
Inventor
Masahisa Sakamoto
Eiichi Sugiyama
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.)
NIPPON N C R KK
NCR Japan Ltd
Original Assignee
NIPPON N C R KK
NCR Japan 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 NIPPON N C R KK, NCR Japan Ltd filed Critical NIPPON N C R KK
Priority to JP8999478A priority Critical patent/JPS5518218A/en
Publication of JPS5518218A publication Critical patent/JPS5518218A/en
Publication of JPS6228694B2 publication Critical patent/JPS6228694B2/ja
Granted 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
    • B01J13/20—After-treatment of capsule walls, e.g. hardening

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:Removal of residual formaldehyde resulting from the formation of microcapsule with the wall membrane of urea-formaldehyde resin, etc. by reacting the residual formaldehyde with saccharide under a specified condition. CONSTITUTION:Microdroplets emulsified in a liquid vehicle are encapsulated with the wall membrane of urea-formaldehyde or melamine-formaldehyde resin to form microcapsules. An excess amount of formaldehyde used is reacted with five members of saccharides such as glucose, fructose, glycerine aldehyde, etc. at a temperature of 20 to 50 deg.C, at a pH of 11 to 12.5 in the presence of a hydroxide of alkali metal such as lithium, sodium, etc. to remove the excess formaldehyde, said alkal; metal hydroxide acting as a catalyst and alkalinity-adjusting agent. The reaction products of formaldehyde with saccharides are harmless and do not deteriorate the quality of the obtained microcapsules.
JP8999478A 1978-07-25 1978-07-25 Removal of excess formaldehyde in dispersion liquid having microcapsule dispersed therein Granted JPS5518218A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8999478A JPS5518218A (en) 1978-07-25 1978-07-25 Removal of excess formaldehyde in dispersion liquid having microcapsule dispersed therein

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8999478A JPS5518218A (en) 1978-07-25 1978-07-25 Removal of excess formaldehyde in dispersion liquid having microcapsule dispersed therein

Publications (2)

Publication Number Publication Date
JPS5518218A true JPS5518218A (en) 1980-02-08
JPS6228694B2 JPS6228694B2 (en) 1987-06-22

Family

ID=13986159

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8999478A Granted JPS5518218A (en) 1978-07-25 1978-07-25 Removal of excess formaldehyde in dispersion liquid having microcapsule dispersed therein

Country Status (1)

Country Link
JP (1) JPS5518218A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2464094A1 (en) * 1979-08-27 1981-03-06 Kanzaki Paper Mfg Co Ltd PROCESS FOR TREATING AN AQUEOUS DISPERSION OF MICROCAPSULES TO ELIMINATE RESIDUAL HIDDE FORMALDEHYDE
JPS5770479U (en) * 1980-10-13 1982-04-28
JPS57147430A (en) * 1981-03-06 1982-09-11 Kureha Chem Ind Co Ltd Preparation of microcapsule
JPH11157208A (en) * 1997-11-25 1999-06-15 Nippon Paper Industries Co Ltd Microcapsule dispersion for pressure-sensitive recording and manufacture thereof
JP2008142708A (en) * 2006-12-06 2008-06-26 Basf Se Microcapsule dispersion comprising microcapsule made from melamine-formaldehyde resin containing decreased amount of formaldehyde
JP2009202123A (en) * 2008-02-28 2009-09-10 Mitsubishi Paper Mills Ltd Microcapsule
EP1930072A3 (en) * 2006-12-06 2012-04-25 Basf Se Formaldehyde-reduced dispersion of microcapsules made from melamine-formaldehyde resin

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2464094A1 (en) * 1979-08-27 1981-03-06 Kanzaki Paper Mfg Co Ltd PROCESS FOR TREATING AN AQUEOUS DISPERSION OF MICROCAPSULES TO ELIMINATE RESIDUAL HIDDE FORMALDEHYDE
JPS5770479U (en) * 1980-10-13 1982-04-28
JPS57147430A (en) * 1981-03-06 1982-09-11 Kureha Chem Ind Co Ltd Preparation of microcapsule
JPH0134649B2 (en) * 1981-03-06 1989-07-20 Kureha Chemical Ind Co Ltd
JPH11157208A (en) * 1997-11-25 1999-06-15 Nippon Paper Industries Co Ltd Microcapsule dispersion for pressure-sensitive recording and manufacture thereof
JP2008142708A (en) * 2006-12-06 2008-06-26 Basf Se Microcapsule dispersion comprising microcapsule made from melamine-formaldehyde resin containing decreased amount of formaldehyde
EP1930072A3 (en) * 2006-12-06 2012-04-25 Basf Se Formaldehyde-reduced dispersion of microcapsules made from melamine-formaldehyde resin
JP2009202123A (en) * 2008-02-28 2009-09-10 Mitsubishi Paper Mills Ltd Microcapsule

Also Published As

Publication number Publication date
JPS6228694B2 (en) 1987-06-22

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