GB722275A - Process for preparing polymers or copolymers of acrylonitrile - Google Patents
Process for preparing polymers or copolymers of acrylonitrileInfo
- Publication number
- GB722275A GB722275A GB3421/52A GB342152A GB722275A GB 722275 A GB722275 A GB 722275A GB 3421/52 A GB3421/52 A GB 3421/52A GB 342152 A GB342152 A GB 342152A GB 722275 A GB722275 A GB 722275A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acrylonitrile
- polymerization
- overpressure
- reaction
- aqueous solution
- 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
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)
Abstract
Polymers of acrylonitrile having a predetermined substantially uniform degree of polymerization are prepared by the aqueous solution polymerization of acrylonitrile, or mixtures thereof with up to 20 per cent of other polymerizable compounds such as vinyl acetate, vinyl pyrrole, and methacrylic compounds, by placing an aqueous solution containing a minor proportion of a water-soluble polymerization catalyst, such as ammonium persulphate, in a closed reaction zone, dissolving in the solution an amount of acrylonitrile which produces a predetermined overpressure by its vapour pressure, and then effecting polymerization at constant temperature, adding additional acrylonitrile as the reaction proceeds sufficient to maintain the overpressure within a range extending over at most 50 mm. Hg., until the reaction is substantially completed. The molecular weight of the polymeric product is a function of the overpressure of the acrylonitrile monomer, higher pressures producing polymers of higher molecular weights. The aqueous reaction medium may be acidified to a pH of 4 with nitric acid.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH722275X | 1951-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB722275A true GB722275A (en) | 1955-01-19 |
Family
ID=4531637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3421/52A Expired GB722275A (en) | 1951-02-09 | 1952-02-08 | Process for preparing polymers or copolymers of acrylonitrile |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE508885A (en) |
| CH (1) | CH295071A (en) |
| FR (1) | FR1050217A (en) |
| GB (1) | GB722275A (en) |
| NL (1) | NL82393C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3427272A1 (en) * | 1984-07-24 | 1986-02-06 | Japan Exlan Co. Ltd., Osaka | Process for the preparation of high-molecular-weight acrylonitrile polymers |
-
0
- NL NL82393D patent/NL82393C/xx active
- BE BE508885D patent/BE508885A/xx unknown
-
1951
- 1951-02-09 CH CH295071D patent/CH295071A/en unknown
-
1952
- 1952-02-05 FR FR1050217D patent/FR1050217A/en not_active Expired
- 1952-02-08 GB GB3421/52A patent/GB722275A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE508885A (en) | |
| FR1050217A (en) | 1954-01-06 |
| NL82393C (en) | |
| CH295071A (en) | 1953-12-15 |
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