JPS6434782A - Preparation of aqueous dispersion of color developer for pressure sensitive copying paper - Google Patents

Preparation of aqueous dispersion of color developer for pressure sensitive copying paper

Info

Publication number
JPS6434782A
JPS6434782A JP62188930A JP18893087A JPS6434782A JP S6434782 A JPS6434782 A JP S6434782A JP 62188930 A JP62188930 A JP 62188930A JP 18893087 A JP18893087 A JP 18893087A JP S6434782 A JPS6434782 A JP S6434782A
Authority
JP
Japan
Prior art keywords
color developer
polyvinyl alcohol
aqueous dispersion
color
emulsifying
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
JP62188930A
Other languages
Japanese (ja)
Other versions
JP2889237B2 (en
Inventor
Tomoharu Shiozaki
Tetsuo Shiraishi
Toranosuke Saito
Shoichi Murata
Eiji Kawabata
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.)
Sanko Kaihatsu Kagaku Kenkyusho KK
Kanzaki Paper Manufacturing Co Ltd
Original Assignee
Sanko Kaihatsu Kagaku Kenkyusho KK
Kanzaki Paper Manufacturing 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=16232381&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JPS6434782(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sanko Kaihatsu Kagaku Kenkyusho KK, Kanzaki Paper Manufacturing Co Ltd filed Critical Sanko Kaihatsu Kagaku Kenkyusho KK
Priority to JP62188930A priority Critical patent/JP2889237B2/en
Priority to AU10268/88A priority patent/AU616163C/en
Priority to EP88100473A priority patent/EP0275107B1/en
Priority to DE88100473T priority patent/DE3879721T2/en
Publication of JPS6434782A publication Critical patent/JPS6434782A/en
Priority to US07/405,063 priority patent/US4950330A/en
Application granted granted Critical
Publication of JP2889237B2 publication Critical patent/JP2889237B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To obtain an aqueous dispersion of a color developer having high concentration and excellent handleability and shelf stability and capable of improving color developing property, printability and light resistance of a color developing sheet, by emulsifying or dispersing a color developer comprising a specified substituted salicylic acid salt as a main constituent in an aqueous solution of polyvinyl alcohol at a temperature higher than the softening point of the color developer, followed by cooling. CONSTITUTION:An aqueous dispersion of a color developer is prepared by a method wherein a color developer comprising a substituted salicylic acid salt of general formula I as a main constituent and having a softening point of at least 30 deg.C is emulsified or dispersed in an aqueous solution of a polyvinyl alcohol having a polymerization degree of at least 500 and a saponification degree of at least 70% at a temperature higher than the softening point of the color developer by at least 30 deg.C, followed by cooling. If the polymerization degree of the polyvinyl alcohol is less than 500, a capability of emulsifying the color developer is unsatisfactory, and it is impossible to obtain an aqueous dispersion of the color developer improved in shelf stability. If the saponification degree of the polyvinyl alcohol is less than 70%, the emulsifying capability is again made unsatisfactory. The polyvinyl alcohol is used preferably in an amount of about 1-30pts.wt. per 100pts.wt. of the color developer.
JP62188930A 1987-01-14 1987-07-30 Method for producing aqueous dispersion of developer for pressure-sensitive copying paper Expired - Fee Related JP2889237B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP62188930A JP2889237B2 (en) 1987-07-30 1987-07-30 Method for producing aqueous dispersion of developer for pressure-sensitive copying paper
AU10268/88A AU616163C (en) 1987-01-14 1988-01-14 An aqueous dispersion of a developer for pressure-sensitive recording sheet and a process for producing the same
EP88100473A EP0275107B1 (en) 1987-01-14 1988-01-14 An aqueous developer dispersion for a pressure-sensitive recording sheet and a process for producing the same
DE88100473T DE3879721T2 (en) 1987-01-14 1988-01-14 Aqueous developer dispersion for a pressure-sensitive recording sheet and process for its production.
US07/405,063 US4950330A (en) 1987-01-14 1989-09-07 Aqueous dispersion of a developer for pressure-sensitive recording sheet and a process for producing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62188930A JP2889237B2 (en) 1987-07-30 1987-07-30 Method for producing aqueous dispersion of developer for pressure-sensitive copying paper

Publications (2)

Publication Number Publication Date
JPS6434782A true JPS6434782A (en) 1989-02-06
JP2889237B2 JP2889237B2 (en) 1999-05-10

Family

ID=16232381

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62188930A Expired - Fee Related JP2889237B2 (en) 1987-01-14 1987-07-30 Method for producing aqueous dispersion of developer for pressure-sensitive copying paper

Country Status (1)

Country Link
JP (1) JP2889237B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63173680A (en) * 1987-01-14 1988-07-18 Sanko Kaihatsu Kagaku Kenkyusho:Kk Water dispersion of color developer for pressure-sensitive recording paper and manufacture thereof
JPH04279386A (en) * 1991-03-08 1992-10-05 Fuji Photo Film Co Ltd Manufacture of developer dispersant for pressure-sensitive sheet
CN110850689A (en) * 2019-11-18 2020-02-28 珠海茂逸复印机耗材有限公司 Self-degradation developer and preparation method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57191087A (en) * 1981-05-21 1982-11-24 Kanzaki Paper Mfg Co Ltd Pressure-sensitive copying paper
JPS6398483A (en) * 1986-10-16 1988-04-28 Kureha Chem Ind Co Ltd Production of color developer sheet for pressure-sensitive recording

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2580144B2 (en) 1987-01-14 1997-02-12 株式会社 三光開発科学研究所 Method for producing aqueous dispersion of developer for pressure-sensitive recording paper

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57191087A (en) * 1981-05-21 1982-11-24 Kanzaki Paper Mfg Co Ltd Pressure-sensitive copying paper
JPS6398483A (en) * 1986-10-16 1988-04-28 Kureha Chem Ind Co Ltd Production of color developer sheet for pressure-sensitive recording

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63173680A (en) * 1987-01-14 1988-07-18 Sanko Kaihatsu Kagaku Kenkyusho:Kk Water dispersion of color developer for pressure-sensitive recording paper and manufacture thereof
JPH04279386A (en) * 1991-03-08 1992-10-05 Fuji Photo Film Co Ltd Manufacture of developer dispersant for pressure-sensitive sheet
CN110850689A (en) * 2019-11-18 2020-02-28 珠海茂逸复印机耗材有限公司 Self-degradation developer and preparation method thereof

Also Published As

Publication number Publication date
JP2889237B2 (en) 1999-05-10

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