http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-908821-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9e5302e08e56037ff7bc5c9b6fcc29f9 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G4-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G4-00 |
| filingDate | 1960-05-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8f46e0b8bbe576b1f6ff9fea32a93306 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a1bbd5cf69ef7edd226d8f98659c1665 |
| publicationDate | 1962-10-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-908821-A |
| titleOfInvention | Phosphorus-containing spirobi-(meta-dioxane) polymers |
| abstract | Flame-resistant resins are prepared by heating at 60 DEG -150 DEG C. a partial phosphite ester of pentaerythritol with a 3,9-dialkenylspirobi(metadioxane) having the general formula <FORM:0908821/IV(a)/1> wherein each R1 is hydrogen, methyl or chlorine and each R2 is hydrogen or methyl. The phosphite esters may be prepared by a transesterification reaction between pentaerythritol and a trialkyl phosphite, e.g. triethyl phosphite or triisopropyl phosphite. The resin-forming reaction mixture may also include an aliphatic polyhydric alcohol and there are specified ethylene glycol, propylene glycol, 1,4-butanediol, 1,6-hexanediol, 2-ethylhexane-1,3-diol, di-ethylene glycol, triethylene glycol, pentaethylene glycol, dipropylene glycol, tripropylene glycol, glycerol, 1,2,4-butanetriol, trimethylol ethane, trimethylol propane, pentaerythritol, sorbitol, mannitol, dulcitol and 2,4-dihydroxy-1,3-di(hydorxymethyl) pentane. The reaction mixture usually contains an acidic catalyst such as sulphuric acid, hydrochloric acid, toluene sulphonic acid, benzene sulphonic acid, boron trifluoride, aluminium chloride, dialkyl sulphates, titanium tetrachloride, phenyl acid phosphate and octylphenyl acid phosphate. In a modification, acrolein is reacted with pentaerythritol in the presence of an acid catalyst to produce a liquid precondensate A-stage resin which is then reacted with the partial phosphite ester of pentaerythritol also in the presence of an acid catalyst. Examples 2-4 illustrate the two embodiments of the invention. Reference has been directed by the Comptroller to Specification 822,668.ALSO:A partial phosphite ester of pentaerythritol, utilized for chemically incorporating phosphorus into polymers (see Group IV(a)), is prepared by a transesterification reaction between pentaerythritol and a molar equivalent or less of a trialkyl phosphite:- <FORM:0908821/IV (b)/1> R being an alkyl group, e.g. ethyl or isopropyl. Example 1 describes the preparation of the partial phosphite ester where R is ethyl. Reference has been directed by the Comptroller to Specification 822,668. |
| priorityDate | 1960-05-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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