IE39127L - Polyacrylonitriles of low molecular weight - Google Patents
Polyacrylonitriles of low molecular weightInfo
- Publication number
- IE39127L IE39127L IE740774A IE77474A IE39127L IE 39127 L IE39127 L IE 39127L IE 740774 A IE740774 A IE 740774A IE 77474 A IE77474 A IE 77474A IE 39127 L IE39127 L IE 39127L
- Authority
- IE
- Ireland
- Prior art keywords
- molecular weight
- acrylonitrile
- per cent
- polymers
- low molecular
- Prior art date
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
Landscapes
- 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)
- Polymerisation Methods In General (AREA)
- Artificial Filaments (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polymerization Catalysts (AREA)
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.
[GB1429138A]
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 (2)
| Publication Number | Publication Date |
|---|---|
| IE39127L true IE39127L (en) | 1974-10-13 |
| IE39127B1 IE39127B1 (en) | 1978-08-02 |
Family
ID=5877914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE00774/74A IE39127B1 (en) | 1973-04-13 | 1974-04-11 | Polyacrylonitriles of low molecular weight and a proces 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)
| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL274858A (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 |
-
1973
- 1973-04-13 DE DE2318609A patent/DE2318609C3/en not_active Expired
-
1974
- 1974-04-10 BE BE143042A patent/BE813535A/en not_active IP Right Cessation
- 1974-04-10 ES ES425194A patent/ES425194A1/en not_active Expired
- 1974-04-10 JP JP4012674A patent/JPS5722044B2/ja not_active Expired
- 1974-04-11 CA CA197,476A patent/CA1023093A/en not_active Expired
- 1974-04-11 DD DD177849A patent/DD114825A5/xx unknown
- 1974-04-11 LU LU69840A patent/LU69840A1/xx unknown
- 1974-04-11 IT IT21321/74A patent/IT1007885B/en active
- 1974-04-11 IE IE00774/74A patent/IE39127B1/en unknown
- 1974-04-12 FR FR7413080A patent/FR2225449B1/fr not_active Expired
- 1974-04-16 GB GB1643574A patent/GB1429138A/en not_active Expired
- 1974-04-16 NL NL7405109A patent/NL7405109A/xx not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| NL7405109A (en) | 1974-10-15 |
| ES425194A1 (en) | 1976-06-16 |
| IE39127B1 (en) | 1978-08-02 |
| JPS5722044B2 (en) | 1982-05-11 |
| FR2225449A1 (en) | 1974-11-08 |
| JPS503186A (en) | 1975-01-14 |
| LU69840A1 (en) | 1974-11-21 |
| DE2318609C3 (en) | 1982-03-18 |
| FR2225449B1 (en) | 1979-05-25 |
| DE2318609B2 (en) | 1981-04-23 |
| DE2318609A1 (en) | 1974-10-31 |
| DD114825A5 (en) | 1975-08-20 |
| BE813535A (en) | 1974-10-10 |
| GB1429138A (en) | 1976-03-24 |
| CA1023093A (en) | 1977-12-20 |
| IT1007885B (en) | 1976-10-30 |
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