JPS5682806A - Preparation of polyvinyl butyral - Google Patents

Preparation of polyvinyl butyral

Info

Publication number
JPS5682806A
JPS5682806A JP15996279A JP15996279A JPS5682806A JP S5682806 A JPS5682806 A JP S5682806A JP 15996279 A JP15996279 A JP 15996279A JP 15996279 A JP15996279 A JP 15996279A JP S5682806 A JPS5682806 A JP S5682806A
Authority
JP
Japan
Prior art keywords
aging
polyvinyl alcohol
polyvinyl
degree
precipitate
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
JP15996279A
Other languages
Japanese (ja)
Inventor
Hiroshi Ogawara
Tadaoki Ii
Shigeru Nomura
Masashi Miyagawa
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical 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 Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP15996279A priority Critical patent/JPS5682806A/en
Publication of JPS5682806A publication Critical patent/JPS5682806A/en
Pending legal-status Critical Current

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  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

PURPOSE: To obtain the titled polymer useful for an intermediate layer for glass, having low autohesion, not adhering by winding after film making, by condensing PVA with butyradehyde in the presence of an acid catalyst at not higher than normal temperature, followed by separating out a precipitate, and aging polyvinyl burytal under specific conditions.
CONSTITUTION: In the presence of an acid catalyst, e,g., hydrochloric acid, etc. butyraldehyde is added dropwise to an aqueous solution of polyvinyl alcohol at not higher than 20°C with stirring so that a reaction takes place to give a precipitate of white fine powdery polyvinyl buryral. The temperature of the reaction system is raised, for example, at a rate of temperature increase 15°C/hour up to not lower than 50°C, and aging is carried out at not lower than 50°C for not shorter than three hours. After the aging, neutralization, washing with water, and drying are done to give the desired white powdery polymer. A polyvinyl alcohol having a spponification degree not les than 95mol% and a polymerization degree 800W3,000 is preferably used as the polyvinyl alcohol, and a butyral degree is preferably 60W75mol%.
COPYRIGHT: (C)1981,JPO&Japio
JP15996279A 1979-12-10 1979-12-10 Preparation of polyvinyl butyral Pending JPS5682806A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15996279A JPS5682806A (en) 1979-12-10 1979-12-10 Preparation of polyvinyl butyral

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15996279A JPS5682806A (en) 1979-12-10 1979-12-10 Preparation of polyvinyl butyral

Publications (1)

Publication Number Publication Date
JPS5682806A true JPS5682806A (en) 1981-07-06

Family

ID=15704966

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15996279A Pending JPS5682806A (en) 1979-12-10 1979-12-10 Preparation of polyvinyl butyral

Country Status (1)

Country Link
JP (1) JPS5682806A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6155102A (en) * 1984-08-10 1986-03-19 ヘキスト・アクチエンゲゼルシヤフト Manufacture of polyvinyl butyral with decreased adhesion andimproved tensile strength
JPS6181450A (en) * 1984-08-10 1986-04-25 ヘキスト・アクチエンゲゼルシヤフト Manufacture of thermoplastic polyvinyl butyral forming material containing plasticizer
JP2011127117A (en) * 2009-12-18 2011-06-30 Kuraray Europe Gmbh Polyvinylacetal with high flowability and plasticizer-containing sheet produced therewith
CN104045751A (en) * 2014-07-02 2014-09-17 四川宝利丰科技有限公司 Preparation method of polyvinyl butyral
CN104844739A (en) * 2015-05-15 2015-08-19 亿帆鑫富药业股份有限公司 Crosslinkable PVB (polyvinyl butyral), production method of crosslinkable PVB, and method utilizing crosslinkable PVB to produce crosslinkable PVB film

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6155102A (en) * 1984-08-10 1986-03-19 ヘキスト・アクチエンゲゼルシヤフト Manufacture of polyvinyl butyral with decreased adhesion andimproved tensile strength
JPS6181450A (en) * 1984-08-10 1986-04-25 ヘキスト・アクチエンゲゼルシヤフト Manufacture of thermoplastic polyvinyl butyral forming material containing plasticizer
JP2011127117A (en) * 2009-12-18 2011-06-30 Kuraray Europe Gmbh Polyvinylacetal with high flowability and plasticizer-containing sheet produced therewith
CN104045751A (en) * 2014-07-02 2014-09-17 四川宝利丰科技有限公司 Preparation method of polyvinyl butyral
CN104844739A (en) * 2015-05-15 2015-08-19 亿帆鑫富药业股份有限公司 Crosslinkable PVB (polyvinyl butyral), production method of crosslinkable PVB, and method utilizing crosslinkable PVB to produce crosslinkable PVB film

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