http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1066296-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5d9f3ca41550d315642580237250c5b0 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F20-44 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F2-36 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F20-44 |
| filingDate | 1964-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1967-04-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1066296-A |
| titleOfInvention | Process for the polymerisation of acrylonitrile |
| abstract | Acrylonitrile polymers are prepared by polymerizing acrylonitrile or copolymerizing acrylonitrile with at least one comonomer from the group consisting of alkyl acrylates and methacrylates, acrylamide and methacrylamide and alkyl derivatives thereof, methacrylonitrile, vinyl and vinylidene halides, vinyl sulphonic and allyl sulphonic acids and their alkali metal salts, and alkali metal allyl sulphoacetates, the total monomers containing at least 50% by weight of acrylonitrile, in an organic solvent, which dissolves the polymer at room temperature or above, and in the presence of the metal V, Ru, Cu, Rh, Pd, Ag, Ir, Pt or Au or of a compound of one of said metals or of a compound of La or Gd, and in the presence of a peroxy compound of sulphur or of sulphur tetroxide and water under conditions such that the tetroxide reacts with the water. Polymerization can be effected at temperatures ranging from -70 DEG to +100 DEG C., preferably from 20 DEG to 50 DEG C. The process can be operated in continuos manner. Organic solvents specified are dimethyl formamide, dimethyl acetamide, g -butyrolactone, ethylene carbonate and dimethyl sulphoxide and mixtures of such solvents, or mixtures thereof with up to 25% by weight of other organic compounds such as alkanols, ketones, hydrocarbons and acetonitrile. Many metal catalyst components are disclosed; besides the free metals, the preferred ones are auric chloride, chloroplatinic acid, palladium chloride, iridium chloride, cupric chloride or nitrate, ruthenium chloride or nitrate, silver acetate or nitrate, vanadium pentoxide, chloride or oxychloride, rhodium nitrate or chloride, and lanthanum or gadolinium nitrate, acetate, sulphate or chloride. Peroxy sulphur compounds specified are Caro's or peroxymonosulphuric acid (H2SO5) and peroxydisulphuric acid and their ammonium and alkali metal (e.g. K or Na) salts, potassium persulphate being preferred; the peroxy compound may be produced in situ, e.g. using H2SO4 and H2O2 to generate Caro's acid. Chain transfer agents, e.g. phenols and alkyl mercaptans such as t-dodecyl mercaptan, may be present during polymerization. Pigments, e.g. titanium dioxide, may be included during or after polymerization. Examples illustrate the preparation of polyacrylonitrile and acrylonitrile-methyl acrylate, acrylonitrile-ethyl acrylate, acrylonitrile - dimethylacrylamide, acrylonitrile-methacrylonitrile, acrylonitrile - methyl acrylate-sodium allyl sulphonate and acrylonitrile-methyl acrylate-sodium allyl sulphoacetate copolymers. The polymer solutions obtained by the process of the invention can be used to form fibres, filaments, films, sheets and other shaped articles. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-0034345-A1 |
| priorityDate | 1963-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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