http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-933449-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_cae71083b119f18009470b1882e54e4d |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C265-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C265-04 |
| filingDate | 1960-11-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0b87be82fc4d25afc9fd6f24b661d31c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_22c373a8e48f85a08f00674857bdc16a |
| publicationDate | 1963-08-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-933449-A |
| titleOfInvention | Nitraza diisocyanates |
| abstract | Polyurethanes useful as solid propellants are prepared by reacting nitrazo diisocyanates of the formula:- <F\1> wherein A and A1 are alkylene radicals and Z is a nitroalkylene radical, with a polyalcohol, e.g. 5,5-dinitro-1,2-hexanediol, in the presence of a ferric acetylacetonate catalyst.ALSO:The invention comprises nitraza diisocyanates of the formula:-<FORM:0933449/IV(a)/1> wherein A and A1 are alkylene radicals and Z is a nitroalkylene radical. The compounds are prepared by reacting a nitraza diacyl halide of the formula:- <FORM:0933449/IV(a)/2> (wherein X represents fluorine, chlorine, bromine or iodine) with an alkali or alkaline earth metal azide to form a nitraza diacyl azide of the formula:- <FORM:0933449/IV(a)/3> which is then heated under anhydrous conditions to effect rearrangement to the isocyanate. Nitraza diacyl halides of the above formula are prepared by treating the corresponding nitraza dicarboxylic acids with a thionyl halide. Nitraza dicarboxylic acids of the formula: <FORM:0933449/IV(a)/4> are prepared by hydrolysis of the corresponding nitraza dinitriles. |
| priorityDate | 1960-11-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 29.