http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1342023-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_385752f237551ca1b257f160a0f2434b |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F36-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F36-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F36-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-00 |
| filingDate | 1971-04-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9e21715913232a7e3b91530396ac0b04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_72e55f727d3018948cf7b885051f07bf http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_dff40e519dddf907662b19adec94b662 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ef30cf204f23c2e46d3a541f71b11bc7 |
| publicationDate | 1973-12-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1342023-A |
| titleOfInvention | Process for producing conjugated diolefin polymers using a cyclic ether as a molecular weight regulator |
| abstract | 1342023 Conjugated diolefin polymers JAPAN SYNTHETIC RUBBER CO LTD 19 April 1971 [3 April 1970] 25763/71 Heading C3P Conjugated diolefins are polymerized, optionally together with vinyl aromatic hydrocarbons, in the presence of an alfin catalyst and as molecular weight regulator a cyclic ether having in its ring a -OCH 2 O or -OCH 2 CH=CH- group. Specified ethers are trioxane, 1,3-dioxane, 1,3-dioxolane and 2,5-dihydrofuran. The alfin catalyst may comprise allyl, benzyl, xylyl, pentenyl, cymyl or mesityl sodium; sodium isopropoxide, 2-butoxide, 3-pentoxide, cyclopentoxide, cyclobutoxide or t.-butoxide; and sodium chloride. The conjugated diene may be butadiene, isoprene, piperylene or 2,3-dimethylbutadiene, which may be copolymerized with styrene, divinylbenzene, methylstyrenes, vinyltoluene, vinyl naphthalenes, p-methoxystyrene or p-bromostyrene. The polymerization may be effected batchwise or continuously in hydrocarbon solvents, and the catalyst subsequently deactivated with water or alcohol. In examples catalysts formed by reacting sodium, amyl chloride, isopropanol and propylene are used to polymerize (1-5, 17 and 18) butadiene, (6-8) isoprene, (13) butadiene and styrene and (15) butadiene and isoprene in the presence of trioxane; to polymerize (9) butadiene in the presence of 1,3-dioxane; and to polymerize (10- 12) butadiene, (14) butadiene and styrene and (16) butadiene and isoprene in the presence of 2,5-dihydrofuran. Comparative examples use 1,4-dioxane, 2,3-dihydrofuran, tetrahydrofuran, ethylene oxide and allyl glycidyl ether. The products are said to have high trans contents and to be useful for the manufacture of tyres. |
| priorityDate | 1970-04-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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Total number of triples: 78.