http://rdf.ncbi.nlm.nih.gov/pubchem/patent/NL-7611932-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_25cabd848a625c278d0f654e54a2f0c0 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-6529 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-4009 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-3831 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-65 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-38 |
| filingDate | 1976-10-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1978-05-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | NL-7611932-A |
| titleOfInvention | METHOD OF PREPARING AN URETHANE. |
| abstract | Urethane elastomers are made by reacting an organic polyisocyanate simultaneously with (1) a linear polyol of mol. wt. 400-5000, (2) an aromatic diamine and (3) a polyol with >=1 urethane bond and/or an aminoalcohol with >= 1 urethane bond. The amt. of (3) used is 5-40 mol. % of (1) + (3). The component (3) is made by reacting a cpd. with an isocyanate gp. with excess polyl and/or aminoalcohol. Specific (3) are 4,4'-methylene-bis (2 chloroaniline), 4,4'-diaminodiphenyldisulphide, 4,4'-methylene bis(2-methoxyaniline), toluene-2,4-diamine, 1,5-naphalenediamine, 1,3-phenylenediamine, benzidine, 2,2'-dimethylbenzidine, bis (4-amino 3 chlorophenyl) oxide, bis (4-amino-3-methoxyphenyl)-decane etc. The polyol (1) may be a known polyester or polyether polyol such as condens. prod. of aliphatic glycol with a dicarboxylic acid chain lengthened in the usual way, polyalkylene ether glycols made by ring opening of ethylene oxide, propylene oxide, THF, etc. polyester glycols e.g. obtg. by ring opening polymerisation of epsilon-caprolactone, long chain diols, OH-terminated polybutadiene, condens prods of ethylene oxide propylene oxide or THF with a starter such as glycerine or trimethylolpropane etc. Suitable polyisocyanates e.g. TDI, m-phenylenediisocyanate, TDI dimers, 4,4'-diphenylmethanediisocyanate, 1,5-naphthalene diisocyanate etc, used at 0.9-1.3 NCO equivs. per total NH2 or OH gps. in all components. The reaction may be carried out using catalysts such as (in)organic zinc cpds. tert amines cyclic amides or quat. ammonium salts. The elastomer forming compsns. having low viscosity and good casting properties. After gelling they rapidly acquire a high initial strength and can be removed from the mould after a short time. They have good pot life and reduced tendency to phase sepn. The cured prods. have good physical properties, ageing resistance and chemical resistance. The prods exhibit reduced fluctuations in demoulding time with casting temp. than prior art systems and the prods have a consistently high transparency. The residues from the casting appts. can be washed out with excess polyol and reacted with an isocyanate cpd. to form component (3). |
| priorityDate | 1976-10-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 62.