http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1083202-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_03414c4fcf54d2102aac1c014bbe0d1b |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-0871 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-4812 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-10 |
| filingDate | 1965-02-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f53d2683676985acb653ffa7e97fa22d |
| publicationDate | 1967-09-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1083202-A |
| titleOfInvention | Production of urethane polymers |
| abstract | Solid polyurethanes in fine particulate form are produced by suspending a reactant in fine particulate form in an organic liquid medium and reacting the suspended reactant with a chain extender in liquid form or in solution, the reactant and the resultant polyurethane both being insoluble in the liquid medium, and the reactant being either a polyester or a polyether or a prepolymer obtained by reacting either the polyether or polyester with an organic polyisocyanate. The reaction medium may be a hydrocarbon e.g. pentane, hexane, hexene, heptane, octane, nonane, decane, undecane, dodecane, eicosane, cyclopentane, cyclohexane, cyclohexene and cycloheptane. C6-C9 hydrocarbons derived from petroleum are preferred. The reaction may be performed in any of four techniques:- (1) The chain extender may be added to the dispersion of solid reactant with stirring. (2) The chain extender may be added to the melt of the solid reactant prior to the formation of the dispersion. (3) A liquid dispersion of the solid reactant in the dispersant may be prepared and then cooled to solidify the solid reactant in particulate form. (4) The solid reactant may be mechanically ground to provide particles of the desired size. The particles themselves or in admixture with a chain extender are then added to the hydrocarbon reaction medium. The polyether may be linear, e.g. polyethylene glycol of M.W. about 6000 or branched, e.g. the sequential condensation product of ethylene diamine with propylene oxide and ethylene oxide of M.W. about 27,000, about 80-90% of the molecule being oxyethylene. In a typical Example (1) a mixture of the tetrol formed by sequential addition of 1:2-propylene oxide and ethylene oxide to ethylene diamine and polyethylene glycol was melted and toluene diisocyanate added. The resulting mixture was added to a mixture of n-hexane and lead naphthenate and allowed to react to produce a polyurethane of particle size 40-50 mesh U.S.S. |
| priorityDate | 1964-03-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 57.