http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0238078-A2
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9e5302e08e56037ff7bc5c9b6fcc29f9 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F7-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B35-589 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G77-62 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B35-589 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F7-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G77-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G77-62 |
| filingDate | 1987-03-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_56cfbfc843af7e929a3e6fcafa792712 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_13d0c5dca6efc0862b8df980aa84c246 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f44c83747f8ea6d30614c8da0e997ccd http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a7b7a69341b651522e3df5c9ea541577 |
| publicationDate | 1987-09-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0238078-A2 |
| titleOfInvention | Method for making polysilazanes and silicon nitride therefrom |
| abstract | A method of preparing silazane polymers, with 3 or more repeating units, of the general formulaand a (CH<sub>3</sub>)<sub>2</sub>NH byproduct group where R ishydrogen, an alkyl group having 1-6 carbon atoms oran aryl group having 6-12 carbon atoms, a = 0, or 1,b = <sub>2</sub>-<sub>4</sub>, c = <sub>0</sub>-<sub>2</sub>, d = 0 or 1, e = 0-2, f = 0-2, g =1-3 anda+c+e+f+g=4 for the polymer units; and R' is hydrogen or methyl, whereby the silazane polymer is substantially free of halide impuriites by transaminating an aminosilane of the general formula (R)<sub>a</sub>((CH<sub>3</sub>)<sub>2</sub>N) <sub>b</sub>H<sub>c</sub>S with an amine of the general formula (CH<sub>3</sub>)<sub>d</sub>NH<sub>3-d</sub>; the amine has a molecular weight lower than 45; all in the presence of an acid catalyst or the ammonium salt of the acid and thereafter condensing to form the polymer. Silicon nitride or silicon nitride containing ceramics. are produced by pyrrolizing the silazane polymers. |
| priorityDate | 1986-03-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 114.