GB1429138A - Polyacrylonitriles of low molecular weight and a process for their production - Google Patents

Polyacrylonitriles of low molecular weight and a process for their production

Info

Publication number
GB1429138A
GB1429138A GB1643574A GB1643574A GB1429138A GB 1429138 A GB1429138 A GB 1429138A GB 1643574 A GB1643574 A GB 1643574A GB 1643574 A GB1643574 A GB 1643574A GB 1429138 A GB1429138 A GB 1429138A
Authority
GB
United Kingdom
Prior art keywords
molecular weight
acrylonitrile
per cent
low molecular
polymers
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
GB1643574A
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.)
Bayer AG
Original Assignee
Bayer 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
Application filed by Bayer AG filed Critical Bayer AG
Publication of GB1429138A publication Critical patent/GB1429138A/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
    • C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
    • C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
    • C08F20/42—Nitriles
    • C08F20/44—Acrylonitrile
    • 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
    • C08F2/00—Processes of polymerisation
    • C08F2/12—Polymerisation in non-solvents
    • C08F2/16—Aqueous medium

Abstract

1429138 Low molecular weight acrylonitrile polymers BAYER AG 16 April 1974 [13 April 1973] 16435/74 Heading C3P The invention comprises low molecular weight acrylonitrile polymers comprising at least 80 wt. per cent acrylonitrile units, having a number average molecular weight of 4500 to 20,000, a molecular weight inconsistency of 1À0 to 2À7, and a K-value of 35-65 (measured at 25‹ C. as a 0À5 wt. per cent solution in dimethyl formamide. The polymers may be produced by precipitation polymerization of the required monomer(s), in a continuous or semi-continuous fashion in a dilute aqueous solution at a pH of 1À5 to 4À0 and in the presence of a colourless complex former to remove heavy metal traces, the concentration of acrylonitrile monomer in the aqueous solution being 0À1 to 1À5% and the initiator being 6-55 wt. per cent (based on the monomer(s)) of a water-soluble redox system. Molecular weight inconsistency is defined by the formula where U is the inconsistency and Mv and Mn are the viscosimetric and osmometric molecular weights respectively. The colourless complex former may be a polyphosphate, ethylene diamine tetraacetic acid, nitrilotriacetic acid, tartaric acid, boric acid or sodium fluoride, all of which are well known. The use of a very dilute solution of acrylonitrile in water as the polymerization system, apparently determines the formation of the low molecular weight polymer. The novel polymers may be blended with a polymer comprising at least 80 wt. per cent acrylonitrile units but having a K-value (determined as above) of at least 75. Such blends are fibre forming.
GB1643574A 1973-04-13 1974-04-16 Polyacrylonitriles of low molecular weight and a process for their production Expired GB1429138A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2318609A DE2318609C3 (en) 1973-04-13 1973-04-13 Process for the preparation of uniform low molecular weight polyacrylonitriles

Publications (1)

Publication Number Publication Date
GB1429138A true GB1429138A (en) 1976-03-24

Family

ID=5877914

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1643574A Expired GB1429138A (en) 1973-04-13 1974-04-16 Polyacrylonitriles of low molecular weight and a process for their production

Country Status (12)

Country Link
JP (1) JPS5722044B2 (en)
BE (1) BE813535A (en)
CA (1) CA1023093A (en)
DD (1) DD114825A5 (en)
DE (1) DE2318609C3 (en)
ES (1) ES425194A1 (en)
FR (1) FR2225449B1 (en)
GB (1) GB1429138A (en)
IE (1) IE39127B1 (en)
IT (1) IT1007885B (en)
LU (1) LU69840A1 (en)
NL (1) NL7405109A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50149064U (en) * 1974-05-27 1975-12-11
JPS5251976A (en) * 1975-10-24 1977-04-26 Hitachi Ltd Chatter time measuring system
JPS58151850U (en) * 1982-04-06 1983-10-12 ヤンマー農機株式会社 Grain automatic grading device
DE3328276A1 (en) * 1983-08-05 1985-02-21 Hoechst Ag, 6230 Frankfurt LOW K VALY POLYACRYLNITRILE, PRODUCTION PROCESS AND SUITABLE USE

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL134233C (en) * 1961-02-20
US3488336A (en) * 1967-05-29 1970-01-06 Standard Oil Co Manufacture of thermoplastic polyacrylonitrile
US3627241A (en) * 1970-06-02 1971-12-14 Commerce Usa Projected image viewer support

Also Published As

Publication number Publication date
LU69840A1 (en) 1974-11-21
BE813535A (en) 1974-10-10
JPS5722044B2 (en) 1982-05-11
FR2225449A1 (en) 1974-11-08
DD114825A5 (en) 1975-08-20
DE2318609B2 (en) 1981-04-23
IE39127L (en) 1974-10-13
IE39127B1 (en) 1978-08-02
DE2318609C3 (en) 1982-03-18
DE2318609A1 (en) 1974-10-31
ES425194A1 (en) 1976-06-16
IT1007885B (en) 1976-10-30
CA1023093A (en) 1977-12-20
NL7405109A (en) 1974-10-15
JPS503186A (en) 1975-01-14
FR2225449B1 (en) 1979-05-25

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee