http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1022166-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b94baf1aad802afc19b0e63b4499b04d |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-44 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-44 |
| filingDate | 1962-09-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1966-03-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1022166-A |
| titleOfInvention | Polycarbonate plasticized polyurethanes |
| abstract | Linear polyurethanes comprise the reaction product of an aromatic polycarbonate derived from an aromatic diol in which either (a) each hydroxyl group is an alcoholic hydroxyl group or (b) each hydroxyl group is attached to a different aromatic nucleus, an aromatic diisocyanate and a linear aliphatic polyester having a molecular weight of 600 to 1200. An alkylene diol may also be present in the reaction as a chain extender. The aromatic diols specified are bisphenol A and various diols of the formula HO-R1-O-(R11)n-Ar-(R11)n -O-R1-OH wherein R1 is an aliphatic radical having 1 to 10 carbon atoms, R11 is a saturated divalent aliphatic radical having from 1 to 10 carbon atoms, n is 0 or 1 and Ar is a phenylene, diphenylene, diphenylenealkane where the alkane has from 1 to 4 carbon atoms, a diphenylene ether, a diphenylene sulphone or a naphthylene group. Many di-isocyanates are specified and the polyesters may be ethylene, propylene, butylene or hexylene adipate, succinate, pimelate, suberate, azelate or sebacate. In the examples, a polycarbonate of 1,4-bis(2-hydroxyethoxy) benzene and poly(tetramethylene adipate) are reacted with m - phenylene di-isocyanate with or without 1,4-butanediol. The m-phenylene di-isocyanate may be replaced by diphenylmethane-p,p1-di-isocyanate. The products may be moulded or milled to give sheets or melt extruded to give fibres or filaments. Polycarbonates are prepared in Examples I, from diethyl carbonate and 1,4-bis(2-hydroxyethoxy)benzene by heating in the presence of NaOH and distilling off EtOH, heating under vacuum and distilling off excess polyol, dissolving in chloroform, deionizing with an ion exchange resin and vacuum drying; and II, by bubbling phosgene through a dioxan solution of 1,4-bis(2-hydroxyethoxy)benzene and pyridine, filtration and combination of the residue with that obtained by filtration after the addition of water to the original filtrate. |
| priorityDate | 1961-09-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 50.