http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-842341-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S526-915 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F236-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F4-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F36-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F36-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F36-18 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F36-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F236-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F36-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F36-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-00 |
| filingDate | 1958-12-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1960-07-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-842341-A |
| titleOfInvention | Process for the polymerisation of unsaturated compounds |
| abstract | Chloroprene is polymerised or copolymerised in aqueous dispersion or emulsion in the presence of a stabilizer and, as catalyst, a mixture of a boron trialkyl and sulphur; the term alkyl also includes cycloalkyl and aralkyl. The boron trialkyl may be the trimethyl, triethyl, tripropyls, tributyls or tricyclohexyl, Specified comonomers are butadiene, 1,2- or 2,3-dichloro-butadiene, 1- or 2- cyanobutadiene, isoprene, vinyl acetate, styrene, alkyl and cycloalkyl acrylates and methacrylates, acrylonitrile, and vinylidene chloride; they may be used in amounts of 0,5-50% by weight of the combined monomers. Temperatures of 5 DEG C. and above are used and the pH is preferably between 7 and 12. The amount of boron trialkyl may be 0,1-2,5% and of sulphur 0,05-1% by weight of the monomers and there may be 0,01-3% of the stabilizer in the chloroprene. The stabilizer is a conventional antioxidant usually already present in the chloroprene such as pyrocatechol, hydroquinone, p-tert-butylpyrocatechol, p-hydroxy-diphenyl, bis-(hydroxyphenyl-) methanes, bis-(2-hydroxy -3-tart-butyl (or cyclohexyl)-5-methyphenyl]methane, p-aminophenol, p,p-diaminodiphenyl-methane, diphenylamine, styrolised diphenylamine, phenyl-alpha-naphthylamine and phenthiazine. Oxygen and peroxides should be absent. Polymerization is terminated at 60-95% conversion by cooling and/or degasification. In a typical example, chloroprene, stabilized with 0,1% of phenthiazine is emulsified with wates and dodecylmercapton using the sodium saltr of disproportionated abietic acid and the condensation product of naphthalene sulphonic acid with formaldehyde and caustic soda. The solution is flushed with nitrogen and polymerized at 5 DEG C. with 0,4% of boron triethyl and 0,2% of sulphur, polymerization being terminated at 75% by removing monomer in vacuo.ALSO:A catalyst for polymerizing chloroprene in aqueous emulsion or dispersion comprises sulphur and a boron trialkyl cycloalkyl or aralkyl. The sulphur is used in amounts of 0.05-1% by weight of the monomer and the boron compound 0.1-2.5%. Specified are boron trimethyl, triethyl, tripropyls, tributyls, and tricyclohexyl. |
| priorityDate | 1956-07-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 82.