JPS5728121A - Production of low polymerization-degree polyvinyl acetate and low polymerization-degree polyvinyl alcohol - Google Patents

Production of low polymerization-degree polyvinyl acetate and low polymerization-degree polyvinyl alcohol

Info

Publication number
JPS5728121A
JPS5728121A JP10388680A JP10388680A JPS5728121A JP S5728121 A JPS5728121 A JP S5728121A JP 10388680 A JP10388680 A JP 10388680A JP 10388680 A JP10388680 A JP 10388680A JP S5728121 A JPS5728121 A JP S5728121A
Authority
JP
Japan
Prior art keywords
polymerization
mercaptan
low polymerization
degree polyvinyl
added
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
JP10388680A
Other languages
Japanese (ja)
Other versions
JPH0140043B2 (en
Inventor
Takuji Okaya
Toshiaki Sato
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.)
Kuraray Co Ltd
Original Assignee
Kuraray 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 Kuraray Co Ltd filed Critical Kuraray Co Ltd
Priority to JP10388680A priority Critical patent/JPS5728121A/en
Publication of JPS5728121A publication Critical patent/JPS5728121A/en
Publication of JPH0140043B2 publication Critical patent/JPH0140043B2/ja
Granted legal-status Critical Current

Links

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  • Polymerization Catalysts (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Polymerisation Methods In General (AREA)

Abstract

PURPOSE: A mercaptan as a chain transfer agent is added by a prescribed amount before the start of polymerization and further continuously added by an specified amount to polymerize polyvinyl acetate of low polymerization degree, preferably of lower than 700, batchwise.
CONSTITUTION: A mercaptan as a chain transfer agent is added to the polymerization system (a vinyl acetate solution in methanol) before the start of the polymerization by such an amount as satisfying equation I ([S] is the concentration of mercaptan; [M]o is the initial concentration of vinyl acetate; the unit of the concentration is mol/1; Cx is the chain transfer constant of mercaptan; P is the target of polymerization degree). At the same time when the polymerization is started, further mercaptan is added to the polymerization system continuously at such a rate as shown by equation II (Rpo is initial polymerization rate in mol/1/sec) to effect the polymerization of vinyl acetate.
COPYRIGHT: (C)1982,JPO&Japio
JP10388680A 1980-07-28 1980-07-28 Production of low polymerization-degree polyvinyl acetate and low polymerization-degree polyvinyl alcohol Granted JPS5728121A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10388680A JPS5728121A (en) 1980-07-28 1980-07-28 Production of low polymerization-degree polyvinyl acetate and low polymerization-degree polyvinyl alcohol

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10388680A JPS5728121A (en) 1980-07-28 1980-07-28 Production of low polymerization-degree polyvinyl acetate and low polymerization-degree polyvinyl alcohol

Publications (2)

Publication Number Publication Date
JPS5728121A true JPS5728121A (en) 1982-02-15
JPH0140043B2 JPH0140043B2 (en) 1989-08-24

Family

ID=14365908

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10388680A Granted JPS5728121A (en) 1980-07-28 1980-07-28 Production of low polymerization-degree polyvinyl acetate and low polymerization-degree polyvinyl alcohol

Country Status (1)

Country Link
JP (1) JPS5728121A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57105410A (en) * 1980-12-23 1982-06-30 Kuraray Co Ltd Continuous preparation of polyvinyl acetate and polyvinyl alcohol having low polymerization degree
JPS59128252A (en) * 1983-01-13 1984-07-24 電気化学工業株式会社 Cement dispersant
JPS6164705A (en) * 1984-09-05 1986-04-03 Toagosei Chem Ind Co Ltd Production of styrene prepolymer
JPS62212403A (en) * 1986-03-13 1987-09-18 Toagosei Chem Ind Co Ltd Production of styrene prepolymer
JP2004068012A (en) * 2002-07-23 2004-03-04 Kuraray Co Ltd Binder for ink and coating material
WO2012043280A1 (en) 2010-09-27 2012-04-05 積水化学工業株式会社 Modified polyvinyl alcohol, modified polyvinyl acetal and ceramic slurry composition
CN102993347A (en) * 2012-09-28 2013-03-27 石河子大学 Method for preparing crosslinking polyvinyl acetate nano-balls uniform in dimension by photo-induced precipitation polymerization
WO2014014009A1 (en) 2012-07-19 2014-01-23 株式会社クラレ Dispersion stabilizer for suspension polymerization, and manufacturing method for vinyl resin
WO2015019613A1 (en) 2013-08-07 2015-02-12 株式会社クラレ Dispersion stabilizer for suspension polymerization, and manufacturing method for vinyl resin
WO2015019614A1 (en) 2013-08-07 2015-02-12 株式会社クラレ Dispersion stabilizer for suspension polymerization, and manufacturing method for vinyl resin
JP2015078318A (en) * 2013-10-18 2015-04-23 東亞合成株式会社 Wet agent for semiconductor and polishing composition
JP2021024966A (en) * 2019-08-06 2021-02-22 三菱ケミカル株式会社 Method of producing polyvinyl ester-based polymer
US11091574B2 (en) 2016-05-31 2021-08-17 Kuraray Co., Ltd. Method for producing vinyl alcohol polymers

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5425990A (en) * 1977-07-28 1979-02-27 Nippon Synthetic Chem Ind Co Ltd:The Dispersion stabilizer for suspension polymerization of vinyl compound

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5425990A (en) * 1977-07-28 1979-02-27 Nippon Synthetic Chem Ind Co Ltd:The Dispersion stabilizer for suspension polymerization of vinyl compound

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57105410A (en) * 1980-12-23 1982-06-30 Kuraray Co Ltd Continuous preparation of polyvinyl acetate and polyvinyl alcohol having low polymerization degree
JPH0140044B2 (en) * 1980-12-23 1989-08-24 Kuraray Co
JPS59128252A (en) * 1983-01-13 1984-07-24 電気化学工業株式会社 Cement dispersant
JPS6164705A (en) * 1984-09-05 1986-04-03 Toagosei Chem Ind Co Ltd Production of styrene prepolymer
JPS62212403A (en) * 1986-03-13 1987-09-18 Toagosei Chem Ind Co Ltd Production of styrene prepolymer
JP2004068012A (en) * 2002-07-23 2004-03-04 Kuraray Co Ltd Binder for ink and coating material
WO2012043280A1 (en) 2010-09-27 2012-04-05 積水化学工業株式会社 Modified polyvinyl alcohol, modified polyvinyl acetal and ceramic slurry composition
WO2014014009A1 (en) 2012-07-19 2014-01-23 株式会社クラレ Dispersion stabilizer for suspension polymerization, and manufacturing method for vinyl resin
CN102993347A (en) * 2012-09-28 2013-03-27 石河子大学 Method for preparing crosslinking polyvinyl acetate nano-balls uniform in dimension by photo-induced precipitation polymerization
WO2015019613A1 (en) 2013-08-07 2015-02-12 株式会社クラレ Dispersion stabilizer for suspension polymerization, and manufacturing method for vinyl resin
WO2015019614A1 (en) 2013-08-07 2015-02-12 株式会社クラレ Dispersion stabilizer for suspension polymerization, and manufacturing method for vinyl resin
US9562115B2 (en) 2013-08-07 2017-02-07 Kuraray Co., Ltd. Dispersion stabilizer for suspension polymerization and method for producing vinyl resin
US9650455B2 (en) 2013-08-07 2017-05-16 Kuraray Co., Ltd. Dispersion stabilizer for suspension polymerization and method for producing vinyl resin
JP2015078318A (en) * 2013-10-18 2015-04-23 東亞合成株式会社 Wet agent for semiconductor and polishing composition
US11091574B2 (en) 2016-05-31 2021-08-17 Kuraray Co., Ltd. Method for producing vinyl alcohol polymers
JP2021024966A (en) * 2019-08-06 2021-02-22 三菱ケミカル株式会社 Method of producing polyvinyl ester-based polymer

Also Published As

Publication number Publication date
JPH0140043B2 (en) 1989-08-24

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