GB1244005A - Graft copolymers and process for their manufacture - Google Patents

Graft copolymers and process for their manufacture

Info

Publication number
GB1244005A
GB1244005A GB52207/68A GB5220768A GB1244005A GB 1244005 A GB1244005 A GB 1244005A GB 52207/68 A GB52207/68 A GB 52207/68A GB 5220768 A GB5220768 A GB 5220768A GB 1244005 A GB1244005 A GB 1244005A
Authority
GB
United Kingdom
Prior art keywords
copolymer
vinyl acetate
graft polymer
trioxane
saponified
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
GB52207/68A
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 DE19671720742 external-priority patent/DE1720742A1/en
Application filed by Hoechst AG, Farbwerke Hoechst AG filed Critical Hoechst AG
Publication of GB1244005A publication Critical patent/GB1244005A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
    • C08G2/38—Block or graft polymers prepared by polymerisation of aldehydes or ketones on to macromolecular compounds
    • 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
    • C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
    • 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)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Graft Or Block Polymers (AREA)

Abstract

1,244,005. Graft polymers. FARBWERKE HOECHST A.G. 4 Nov., 1968 [2 Nov., 1967], No. 52207/68. Headings C3G and C3P. A graft polymer consists of (a) an oxymethylene copolymer, which is alkali stable or can be stabilized with alkali, of trioxane or formaldehyde with 0À1 to 50% by weight of a comonomer free from saponifiable groups, and (b) polyvinyl alcohol or a copolymer of vinyl alcohol with an olefin, which copolymer is obtained by saponification of a copolymer of vinyl acetate with 0À1 to 50% by weight of an olefin. The graft polymer is produced by saponification in the presence of a strong alkali in a mixture of a watersoluble organic solvent and water at a temperature in the range 40‹ to 200‹ C., and a pressure in the range of atmospheric pressure to 50 atmospheres of a graft polymer of copolymer (a) and polymer (b). The graft polymer which is saponified is prepared by (i) grafting vinyl acetate or vinyl acetate and an olefin on to copolymer (a) using a free radical initiator, (ii) grafting trioxane or formaldehyde and a comonomer on to polyvinyl acetate or. a vinyl acetate-olefin copolymer using a cationic initiator or (iii) kneading copolymer (a) with polyvinyl acetate or a vinyl acetate-olefin copolymer in the presence of a free radical initiator. In Examples 1 and 2, vinyl acetate is grafted on to a trioxanedioxolane copolymer, the graft copolymer being saponified in aqueous methanol containing NaOH or aqueous dioxane containing KOH. The graft polymer produced in Example 3 by grafting vinyl acetate on to a trioxane ethylene oxide copolymer is saponified in aqueous methanol containing sodium acetate. In Examples 4 and 6, trioxane and 1,3,6-trioxacyclooctane are grafted on to polyvinyl acetate or a vinyl acetate ethylene copolymer using pnitrophenyl-diazonium fluoborate as initiator, the resulting graft polymer being saponified in aqueous methanol containing borax. A copolymer of trioxane and ethylene oxide is kneaded in Example 5 at 200‹ C. with polyvinyl acetate in the presence of dicumyl peroxide to produce a graft polymer which is saponified in aqueous dimethyl formamide containing NaOH.
GB52207/68A 1967-11-02 1968-11-04 Graft copolymers and process for their manufacture Expired GB1244005A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19671720742 DE1720742A1 (en) 1967-11-02 1967-11-02 Process for the production of graft copolymers from polyacetals and polyvinyl alcohol

Publications (1)

Publication Number Publication Date
GB1244005A true GB1244005A (en) 1971-08-25

Family

ID=5689840

Family Applications (1)

Application Number Title Priority Date Filing Date
GB52207/68A Expired GB1244005A (en) 1967-11-02 1968-11-04 Graft copolymers and process for their manufacture

Country Status (2)

Country Link
FR (1) FR1595674A (en)
GB (1) GB1244005A (en)

Also Published As

Publication number Publication date
FR1595674A (en) 1970-06-15

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