http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1048992-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8b8d136bb1ec3fa4875f08a1f6e81199 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d3bf0e41cbec09862a2084f5bb206fc2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_692f1ed35ac3e169fd4b75b4131ac7f2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3b43a9873f4b98896475e2454c53b416 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3a9fb87f299962ea692257ef7d455980 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2483-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2375-08 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-0061 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-16 |
| filingDate | 1963-07-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1966-11-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1048992-A |
| titleOfInvention | Process for the production of cellular polyurethanes |
| abstract | Cellular polyurethanes are prepared by reacting a polyhydroxy polyoxyalkylene glycol ether of M.W. at least 500 with an organic polyisocyanate in the presence of (a) water and/or a non-aqueous blowing agent, (b) a catalyst system for the reaction which comprises at least one organic tin compound and/or at least one organic tertiary amine and (c) a foam-stabilizer consisting of a siloxane-oxyalkylene block copolymer of the general formula <FORM:1048992/C3/1> in which a is from 4 to 10, b is from 2 to 9, R and R1 are hydrocarbon radicals which may be the same or different throughout the polymer molecule, the radicals R attached to any one silicon atom being the same or different, Z is a polyoxyalkylene radical represented by:- -(C2H4O)m(C3H6O)pR11 wherein m+p lies between 15 and 60 and p is between 0.4m and 3m and R11 is a hydrocarbon radical which may be the same or different in various Z residues. The radicals R and R1 in the siloxane-oxyalkylene block copolymer are preferably methyl radicals, but may also be ethyl vinyl or phenyl radicals. R11 is suitably a C1- 6 alkyl radical and may also be a phenyl, cresyl or benzyl radical. The preferred polyhydroxy polyoxyalkylene glycols are those prepared by reacting 1,2-propylene oxide with such compounds as ethylene glycol, 1,2-propylene glycol, butane diol, diethylene glycol, glycerol, trimethylolpropane, hexane triol, pentaerythritol, alpha methyl glucoside and sorbitol. Mixtures of polyhydroxy ethers may be used. Suitable polyisocyanates are hexamethylene diisocyanate, xylene diisocyanate, 4,41-diisocyanato-diphenylmethane, a mixture of 80% toluene, 2,4-diisocyanate and 20% toluene - 2,6 - diisocyanate and polyalkylpolyphenyl isocyanates. The blowing agents may be water, trichlorofluoromethane, dichlorofluoromethane or methylene dichloride. Suitable tin catalysts are stannous octoate, stannous oleate, the stannous salts of gamma(2-methyl, 4-chlorophenoxy) butyric acid and gamma(t.-butylphenoxy) butyric acid and dibutyl tin dilaurate. Triethylamine, triethanolamine, N-methyl morpholine, triethylene diamine and N,N,N1,N1-tetramethyl-1,3-butane diamine are suitable tertiary amine catalysts. Mixtures of catalysts may be used, a preferred mixture being one of a tin salt and triethylene diamine. |
| priorityDate | 1963-07-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 85.