http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-752931-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c7ad58d3c0b071069a8ee0cb8c8ba2e8 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C263-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C265-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C265-14 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C263-16 |
| filingDate | 1954-04-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1956-07-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-752931-A |
| titleOfInvention | Production of halogenated isocyanates |
| abstract | The invention comprises polyisocyanates of aromatic compounds having also one or more haloalkyl or haloalkoxy groups and a process for obtaining halogenated isocyanates by halogenating alkyl or alkoxy aromatic di-isocyanates in the side-chain, with the aid of heat, actinic light or free-radical producing agents; also polyisocyanates containing a halogenated alkylene group linking two aromatic nuclei. In examples, m-toluene isocyanate, p-toluene isocyanate, 2 : 4-toluylene di-isocyanates, 2 : 6-toluylene di-isocyanate, 4 : 41-diphenylmethane-di-isocyanate, 1 - ethyl - 2 - phenyl - isocyanate, and 3 : 31 - bis - methoxy - 4 : 41 - diphenyl - diisocyanate, are chlorinated or brominated in actinic light and solvents and with free-radical producing agents to give the corresponding monohalomethyl derivatives, including 4 : 41-diphenyl - chloromethane - di - isocyanate, a - chloroethyl - phenyl - isocyanate, 1 - bromomethyl phenyl di-isocyanate and 3 : 31-bischloromethoxy - 4:41 - diphenyl - di - isocyanate; also the 1-trichloromethylphenyl 2:4-diisocyanate. The 1-chloromethyl - phenyl - diisocyanate-2:4 gives by reaction with methanol, a urethane which reacts with pyridine to give a water-soluble quaternary salt. A polyurethane is obtained by reaction between 1:4-butanediol and the halomethylphenyl-2:6-di-isocyanates, and quaternary products are generally obtainable from the urethanes. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3535360-A |
| priorityDate | 1953-04-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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