http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CA-1300790-C
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b7e83349cd427990f47a3cf658c7aa06 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-0819 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-7818 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-5042 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-78 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-50 |
| filingDate | 1986-08-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1992-05-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b7917adc20988ae9546f4aa7577cd195 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b59aca9cf20a2be6ab8d1019b9e76eb6 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a01e72bff93951478a0251de4e68ac56 |
| publicationDate | 1992-05-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CA-1300790-C |
| titleOfInvention | Stable, aqueous dispersions of polyurethane-ureas |
| abstract | Mo-2698 STABLE, AQUEOUS DISPERSIONS OF POLYURETHANE-UREAS ABSTRACT OF THE DISCLOSURE The present invention is directed to a process for the preparation of aqueous polyurethane-urea dispersions with improved hydrolytic stability by a) forming an aqueous polyurethane-urea dispersion, optionally by chain extending an aqueously dispersed isocyanate-terminated prepolymer, containing carboxylic acid groups neutralized with volatile organic bases, b) converting the volatile, organic base-neutralized carboxylic acid groups to nonvolatile cation-neutralized carboxylate groups by adding alkali metal salts of organic or inorganic acids having a pKa greater than 0 to the aqueous polyurethane-urea dispersion of (a) in an amount sufficient to displace at least a portion of the volatile organic bases and, optionally, c) removing the volatile organic bases by distillation, optionally under reduced pressure. The present invention is also directed to the products produced by this process. |
| priorityDate | 1985-09-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 138.