| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3194cfc46a651b36dd1bdbf2b7761369 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C263-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-58
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-7664 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-76
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C265-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-08 |
| filingDate |
1974-07-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1975-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_74955f1b9bec007802e0ba2fbd765fe1 |
| publicationDate |
1975-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-3925437-A |
| titleOfInvention |
Reduction of acidity of organic polymeric isocyanates |
| abstract |
The acidity of methylene-bridged polyphenyl polyisocyanate mixtures is reduced by mixing with the isocyanate mixture a lower alkylene oxide compound having from about 2 to about 4 carbons per molecule in an amount at least in excess of the stoichiometric amount, based upon the amount of acid present in the isocyanate. The admixing is preferably carried out at room temperature whereby the acidity of the isocyanate mixture is greatly reduced with no appreciable change in viscosity or equivalent weight. Methylene-bridged polyphenyl polyisocyanate mixtures treated by the process exhibit increased reactivity in the production of polyurethane and polyisocyanurate foams, elastomers and the like that have improved structural characteristics as compared to like materials prepared from untreated polyisocyanate mixtures. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7038002-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6127463-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5783652-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005020797-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2009082481-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0374932-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5726240-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0482490-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0482490-A2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6166128-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5216042-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4904704-A
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1440990-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6528609-B1 |
| priorityDate |
1974-07-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |