http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1214924-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dad81fcefa54e8466a99b46e63c5cf9f |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-44 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-44 |
| filingDate | 1968-01-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d42ed675b074764f6841c5a0237f58e4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fd6017263cdddde4a38bfceaab4f9de8 |
| publicationDate | 1970-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1214924-A |
| titleOfInvention | Phenylene oxide polymers of controlled chain length |
| abstract | 1,214,924. Phenylene oxide polymers. NORTH AMERICAN ROCKWELL CORP. 10 Jan., 1968 [11 Jan., 1967], No. 1538/68. Heading C3R. The chain-length of polyphenylene oxide polymers obtained from phenols substituted in at least the 2- and 6-positions by reacting them with oxygen in the presence of copper/amine catalysts, is controlled by mixing with the starting phenols a phenol substitute in at least the 4-position and having the general formula: where n is from 0 to 1000 R1 2 , R<SP>1</SP> 6 , R<SP>11</SP> 2 and R<SP>11</SP> 6 are individually H, CH 3 , C 2 H 3 , CH=CH 2 , C 3 H 7 , CH 2 CH=CH 2 , C 4 H 9 , Cl, Br, I, CH 2 Cl, CH 2 Br, CH 2 I, C 2 H 4 Cl, C 2 H 4 Br, C 2 H 4 I; R<SP>1</SP> 3 , R1 5 , R<SP>11</SP> 3 , and R<SP>11</SP> 5 are individually H, CH 3 , C 2 H 5 , CH=CH 2 , C 3 H 7 , CH 2 CH=CH 2 , C 4 H 9 , Cl, Br, I, CH 2 Cl, CH 2 Br, CH 2 I, CH 2 OH, C 2 H 4 Cl, C 2 H 4 Br, C 2 H 4 I, NO 2 , COOH or a radical derived from esters or ketones of from 2 to 5 carbon atoms; R<SP>1</SP> 4 is C 2 H 5 , CH 3 , CH 2 Br, CH 2 Cl, CH 2 I, COOH, CH=CH 2 , C 3 H 7 , CH 2 CH=CH 2 , C 4 H 9 , CH 2 OH, or a radical derived from an ester or ketone of from 2 to 5 carbon atoms. The 4-substituted phenol acts as a chain-terminator and the chain length of the polymer varies inversely with the concentration of the 4- substituted phenol. In examples polymers are obtained from 2,6-dimethylphenol using 2,4,6- trimethylphenol, 2,6 - dimethyl - 4 - allylphenol, 2,4-dimethylphenol, 4 - allyl - 2 - methylphenol and 4-methylphenol as chain-terminators, and copolymers are obtained from 2,6-dimethylphenol and 2-allyl-6-methylphenol using 2,4,6 - trimethylphenol and 2 - methyl - 4 - allylphenol as chain-terminators; the catalyst is prepared from cuprous chloride and pyridine. |
| priorityDate | 1967-01-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.