http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-978307-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_73ee0bacab5a7576a6a3244747f6ea99 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2110-0083 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2110-005 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2110-0025 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2110-0016 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-5021 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F3-003 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-7621 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F3-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-76 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-50 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-10 |
| filingDate | 1962-10-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_420e9c54e9214794046c53d92e8591e6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f39188d810926cfcde769431ebd4f9f2 |
| publicationDate | 1964-12-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-978307-A |
| titleOfInvention | Improvements in or relating to the manufacture of foamed polyurethanes |
| abstract | Foamed polyurethanes are obtained by reacting hydroxyl group containing polymers containing at least two isocyanate reactive groups per molecule in the presence of (1) a gas forming agent such as water or a non-isocyanate reactive organic liquid with a boiling point not exceeding 75 DEG C. and (2) a preformed reaction product of tolylene diisocyanate with a polyester which contains at least three hydroxyl groups per molecule and which is the reaction product of a polycarboxylic acid with a mixture of at least two polyhydric alcohols each of which contains at least three hydroxyl groups per molecule. said polyester being used in such proportions as to react with from 10% to 40% isocyanate groups in the tolylene diisocyanate. The tolylene diisocyanates are preferably the 2:4 and 2:6 isomers and mixtures thereof. Suitable polyhydric alcohols for the preparation of the polyester include glycerol, trimethylolethane, trimethylolpropane and other hexanetriols and pentaerythritol and sorbitol. Specified carboxylic acids are succinic, glutaric, adipic, seberic, azelaic, sebacic, phthalic, isophthalic and terephthalic acids, trimesic, trimellitic, tricarballylic and mixtures thereof. The most suitable polyesters are those obtained by reacting two or more members of the group consisting of trimethylolpropane, trimethylolethane glycerol and pentaerythritol with adipic acid or mixtures of adipic and phthalic acid. The polyisocyanate composition may be prepared at temperatures of from 20 DEG C. to 110 DEG C. in the presence of acidic materials e.g. acetyl or benzoyl chloride. Organic gas forming agents are monofluorotrichloromethane, dichlorodifluoromethane dichloromonofluoromethane, monochlorodifluoroethane, dichlorotetrafluoroethane, 1:1:2 trichloro-1:2:2-trifluoroethane, dibromo-difluoro methane and monobromotrifluoroethane. Catalysts may be incorporated in the mixture, particularly tertiary amines such as triethylamine dimethylethylamine, dimethylbenzylamine, dimethylcyclohexylamine, dimethylphenylethylamine, tetramethyl-1:3-butanediamine, triethylene diamine. N-alkylmorpholines, N-alkyl pyrrolidines, N-alkylpiperidines, pyrollizidine, b -dimethylaminopropionamide and fully N-substituted 4 aminopyridines such as 4 dimethylaminopyridine. Other catalysts include dibutyltin dilaurate, dibutyl tin diacetate, iron acetylacetonate, manganese acetylacetonate, stannous octoate, lead acetate and lead octoate. Surface active agents may be added e.g. siloxano-oxyalkylene block copolymers, oxyethylated phenols, oxyethylated fatty alcohols and block copolymers of ethylene and propylene oxides. Other additives include foam stabilising agents e.g. ethyl cellulose, colouring matters, fillers, plasticizers, flame retardants such as tri-(b -chloroethyl) phosphate or antimony oxide and antioxidants such as tertiary butyl catechol. In the examples, polyethers used include the polymer of propylene oxide with triethanolamine, of propylene oxide with trimethylolpropane and polyoxypropylene triol. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2011025710-A1 |
| priorityDate | 1962-10-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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