JPS57105410A - Continuous preparation of polyvinyl acetate and polyvinyl alcohol having low polymerization degree - Google Patents

Continuous preparation of polyvinyl acetate and polyvinyl alcohol having low polymerization degree

Info

Publication number
JPS57105410A
JPS57105410A JP18332480A JP18332480A JPS57105410A JP S57105410 A JPS57105410 A JP S57105410A JP 18332480 A JP18332480 A JP 18332480A JP 18332480 A JP18332480 A JP 18332480A JP S57105410 A JPS57105410 A JP S57105410A
Authority
JP
Japan
Prior art keywords
mercaptan
reactor
fed
reactors
vinyl acetate
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
JP18332480A
Other languages
Japanese (ja)
Other versions
JPH0140044B2 (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 JP18332480A priority Critical patent/JPS57105410A/en
Publication of JPS57105410A publication Critical patent/JPS57105410A/en
Publication of JPH0140044B2 publication Critical patent/JPH0140044B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To obtain the titled polymers having uniform and narrow distribution of molecular weights industrially and advantageously, by feeding a mercaptan continuously to reactors in the respective stages of a multi-stage continuous polymerization apparatus at a specific ratio, carrying out the solution polymerization of vinyl acetate, and saponifying the resultant polymer.
CONSTITUTION: In polymerizing vinyl acetate in a solution in methanol with a multi-stage continuous polymerization apparatus consisting of n (n≥1) reactors, a mercaptan, e.g. n-dodecyl mercaptan or 2-mercaptoethanol, is fed continuously to the respective reactors in the respective stages according to the formula {[X]is the molar concentration of the mercaptan; x is the rate of polymerization; Cx is the chain transfer coefficient to the mercaptan; 0[X]m is the molar concentration of the mercaptan fed to the m-th reactor based on the total amount of the vinyl acetate and the methanol fed to the first reactor; [X]m is the molar concentration of the mercaptan in the m-th reactor; 1≤m≤n}. Preferably, the mercaptan is not newly fed to the n-th reactor.
COPYRIGHT: (C)1982,JPO&Japio
JP18332480A 1980-12-23 1980-12-23 Continuous preparation of polyvinyl acetate and polyvinyl alcohol having low polymerization degree Granted JPS57105410A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18332480A JPS57105410A (en) 1980-12-23 1980-12-23 Continuous preparation of polyvinyl acetate and polyvinyl alcohol having low polymerization degree

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18332480A JPS57105410A (en) 1980-12-23 1980-12-23 Continuous preparation of polyvinyl acetate and polyvinyl alcohol having low polymerization degree

Publications (2)

Publication Number Publication Date
JPS57105410A true JPS57105410A (en) 1982-06-30
JPH0140044B2 JPH0140044B2 (en) 1989-08-24

Family

ID=16133706

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18332480A Granted JPS57105410A (en) 1980-12-23 1980-12-23 Continuous preparation of polyvinyl acetate and polyvinyl alcohol having low polymerization degree

Country Status (1)

Country Link
JP (1) JPS57105410A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5349023A (en) * 1991-12-12 1994-09-20 Kuraray Co., Ltd. Vinyl alcohol copolymer having terminal amino group
US6939931B2 (en) 2002-04-11 2005-09-06 Wacker Polymer Systems Gmbh & Co. Kg Process for preparing solid polyvinyl ester resins
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
CN104086682A (en) * 2014-07-03 2014-10-08 苏州大学 Method for synthetizing polyvinyl acetate with high molecular weight and narrow molecular-weight distribution
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
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
JP2015078318A (en) * 2013-10-18 2015-04-23 東亞合成株式会社 Wet agent for semiconductor and polishing composition

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6806395B1 (en) 2020-04-14 2021-01-06 株式会社エーゾーン Bonding structure of plate material and assembly using this

Citations (2)

* 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
JPS5728121A (en) * 1980-07-28 1982-02-15 Kuraray Co Ltd Production of low polymerization-degree polyvinyl acetate and low polymerization-degree polyvinyl alcohol

Patent Citations (2)

* 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
JPS5728121A (en) * 1980-07-28 1982-02-15 Kuraray Co Ltd Production of low polymerization-degree polyvinyl acetate and low polymerization-degree polyvinyl alcohol

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5349023A (en) * 1991-12-12 1994-09-20 Kuraray Co., Ltd. Vinyl alcohol copolymer having terminal amino group
US6939931B2 (en) 2002-04-11 2005-09-06 Wacker Polymer Systems Gmbh & Co. Kg Process for preparing solid polyvinyl ester resins
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
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
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
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
CN104086682A (en) * 2014-07-03 2014-10-08 苏州大学 Method for synthetizing polyvinyl acetate with high molecular weight and narrow molecular-weight distribution

Also Published As

Publication number Publication date
JPH0140044B2 (en) 1989-08-24

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