GB1168757A - Process for the Manufacture of Polyvinyl Alcohol. - Google Patents

Process for the Manufacture of Polyvinyl Alcohol.

Info

Publication number
GB1168757A
GB1168757A GB4280268A GB4280268A GB1168757A GB 1168757 A GB1168757 A GB 1168757A GB 4280268 A GB4280268 A GB 4280268A GB 4280268 A GB4280268 A GB 4280268A GB 1168757 A GB1168757 A GB 1168757A
Authority
GB
United Kingdom
Prior art keywords
polyvinyl alcohol
manufacture
sept
alcoholysis
mixture
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.)
Expired
Application number
GB4280268A
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.)
Hoechst AG
Original Assignee
Hoechst AG
Farbwerke Hoechst AG
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
Priority claimed from DE19671720709 external-priority patent/DE1720709C3/en
Application filed by Hoechst AG, Farbwerke Hoechst AG filed Critical Hoechst AG
Publication of GB1168757A publication Critical patent/GB1168757A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F8/00—Chemical modification by after-treatment
    • C08F8/12—Hydrolysis

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)

Abstract

1,168,757. Polyvinyl alcohol. FARBWERKE HOECHST A.G. 9 Sept., 1968 [9 Sept., 1967], No. 42802/68. Heading C3P. The continuous alcoholysis of polyvinyl acetate is effected by applying a homogeneous mixture of a solution of the polymer in methanol with an alkali methylate catalyst to an endless belt conveyer which is coated with a polyolefin to prevent the mixture sticking. This is of particular value where the alcoholysis is incomplete.
GB4280268A 1967-09-09 1968-09-09 Process for the Manufacture of Polyvinyl Alcohol. Expired GB1168757A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671720709 DE1720709C3 (en) 1967-09-09 1967-09-09 Process for the continuous production of polyvinyl alcohol

Publications (1)

Publication Number Publication Date
GB1168757A true GB1168757A (en) 1969-10-29

Family

ID=5689824

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4280268A Expired GB1168757A (en) 1967-09-09 1968-09-09 Process for the Manufacture of Polyvinyl Alcohol.

Country Status (5)

Country Link
CS (1) CS150962B2 (en)
FR (1) FR1577948A (en)
GB (1) GB1168757A (en)
PL (1) PL80323B1 (en)
RO (1) RO57506A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0032572A1 (en) * 1980-01-11 1981-07-29 Hoechst Aktiengesellschaft Process for the preparation of a polyvinyl alcohol complex compound, and polyvinylalcohol complex compound so prepared
US4542178A (en) * 1978-03-23 1985-09-17 Hoechst Aktiengesellschaft Plasticizer-containing polyvinyl alcohol granules
US5914369A (en) * 1996-01-27 1999-06-22 Clariant Gmbh Process for the preparation of polyvinyl alcohol
CN112592418A (en) * 2020-12-14 2021-04-02 安徽皖维高新材料股份有限公司 Preparation method of polyvinyl alcohol special for optical film

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2251603A1 (en) * 1972-10-20 1974-04-25 Wacker Chemie Gmbh PROCESS FOR CONTINUOUS REESTERIFICATION OF POLYVINYL ACETATE

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4542178A (en) * 1978-03-23 1985-09-17 Hoechst Aktiengesellschaft Plasticizer-containing polyvinyl alcohol granules
EP0032572A1 (en) * 1980-01-11 1981-07-29 Hoechst Aktiengesellschaft Process for the preparation of a polyvinyl alcohol complex compound, and polyvinylalcohol complex compound so prepared
US4331781A (en) 1980-01-11 1982-05-25 Hoechst Aktiengesellschaft Process for the preparation of a polyvinyl alcohol complex compound in the presence of an organic boric acid derivative
US5914369A (en) * 1996-01-27 1999-06-22 Clariant Gmbh Process for the preparation of polyvinyl alcohol
CN112592418A (en) * 2020-12-14 2021-04-02 安徽皖维高新材料股份有限公司 Preparation method of polyvinyl alcohol special for optical film
CN112592418B (en) * 2020-12-14 2023-10-27 安徽皖维高新材料股份有限公司 Preparation method of polyvinyl alcohol special for optical film

Also Published As

Publication number Publication date
FR1577948A (en) 1969-08-08
PL80323B1 (en) 1975-08-30
CS150962B2 (en) 1973-09-17
RO57506A (en) 1975-01-15

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