| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dcb88e6c103e4974b104452c51fbb4a5 |
| classificationCPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G2150-20 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-8061
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-7825
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D251-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G18-8038 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C239-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-00
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D251-34
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-80
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G18-78
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C275-04
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C275-26
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C275-14 |
| filingDate |
1988-09-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4506b307b034713b5dd0fd8d626dc187 |
| publicationDate |
1989-06-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0321658-A1 |
| titleOfInvention |
Process for the preparation of blocked polyisocyanates containing urea groups, and products prepared therefrom |
| abstract |
A direct reaction of polyisocyanates and polyamines is violent and cannot be controlled. It is therefore necessary to use the polyisocyanate in a blocked form. In previously known processes, it was not possible to obtain the desired semi-blocked adducts; larger portions of completely blocked product were obtained in addition to unreacted polyisocyanate. The further implementation with polyamines was unsuccessful.n n n The production of blocked, urea-containing polyisocyanates was made possible by the use of semi-blocked polyisocyanates, which are formed by adding blocking agents to multiply excess polyisocyanate, followed by thin-film distillation and subsequent conversion with polyamines in an NCO / amino group ratio of 1 to 1.3: 1 up to 1: 1.n n n The blocked, urea-containing polyisocyanates are used in particular for PUR coatings. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0789044-A1 |
| priorityDate |
1987-11-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |