http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-869476-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b30d807376962224a66aa244d678104a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C37-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C39-367 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08K5-13 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C37-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08K5-13 |
| filingDate | 1958-09-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4ea17ffbc58381c22c04a481dd5b4d38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e48ddbc238660933322065c1b7185eef |
| publicationDate | 1961-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-869476-A |
| titleOfInvention | Improvements in or relating to dihydroxydiarylmethanes |
| abstract | Compounds of the general formula: <FORM:0869476/IV (a)/1> (where R is derived from a monocyclic aromatic aldehyde R,CHO which contains only carbon, hydrogen, chlorine, and oxygen, in the molecule, R1 is an alkyl group containing at least 4 carbon atoms, and R2 is an alkyl group) are used as antioxidants in rubber base stocks. Examples of such compounds are 2, 4-dichlorophenyl bis(21-methyl- 41-hydroxy- 51- t-butyl-phenyl) - methane and the corresponding 2-chlorophenyl and 2-chloro-6-hydroxy-phenyl compounds.ALSO:The invention comprises compounds of the general formula: <FORM:0869476/IV (b)/1> in which the group R is derived from monocyclic aromatic aldehyde R,CHO which contains only carbon, hydrogen, chlorine, and oxygen atoms in the molecule, R1 is an alkyl group containing at least 4 carbon atoms, and R2 is an alkyl group. The compounds are prepared by condensing a monocyclic aromatic aldehyde R,CHO with 3,6-dialkylphenol in the presence of an acidic catalyst. An inert solvent may be present in the reaction mixture. Specified dialkyl phenols include 3-methyl-6-t-butyl phenol, 3-methyl-6-isoamyl phenol, 3-methyl-6-n-decyl phenol, and 3,6-di-t-butyl phenol. Aldehydes specified are o-chlorobenzaldehyde, 2,4-dichlorobenzaldehyde, 2,4,6-trichlorobenzaldehyde, and 5-chloro-salicylaldehyde. Hydrochloric acid may be used as the acidic catalyst. Examples describe the production of 2,4-dichlorophenyl bis(21-methyl-41-hydroxy-51-t-butyl-phenol) - methane, 2-chloro-6-hydroxy-phenyl bis(21-methyl-41-hydroxy-51-t-butyl-phenyl) -methane, and 2-chlorophenyl bis(21-methyl-41-hydroxy-51-t-butyl-phenyl) methane. The condensation is effected by heating the mixture of reactants at 95 DEG C. hydrochloric acid being present as catalyst. The compounds have antiseptic and germicidal properties and may be used as antioxidants in rubber compositions. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4239057-A |
| priorityDate | 1958-09-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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