http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-4018764-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9f6f83121b734f1923bf4d8bc144abbd |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G12-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G12-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G12-40 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G12-38 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G12-46 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G12-40 |
| filingDate | 1990-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fbd35cc36fd930b571b8354f95e205e2 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_22af0a0db35a5a47d7c2b93aa5379c21 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7ae33f534d5747e507531dd5a2108717 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d93a82aec107f9cc191df9d49b6c9418 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e328c5f45372c36b82e5ce8b60916b38 |
| publicationDate | 1991-09-05-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-4018764-A1 |
| titleOfInvention | METHOD FOR PRODUCING MODIFIED UREA MELAMINE RESIN SOLUTIONS |
| abstract | Prepn. of modified urea-melamine resin solns. (I) employing NaOH and/or triethanolamine and/or NH4OH as catalyst by multi-stage condensation is claimed. The pH of a formaldehyde soln. contg. 5-11.5 wt.% methanol is adjusted to 7.5-8.1 by the addition of triethanolamine or NaOH or NH4OH, to pH 8.7-10 esp. 8.7-9.3 by 0.5-10 esp. 0.5-5 wt.% substances contg. reactive -CONH2- and/or -CH2OH- and/or -CH(OH)-gps. and further addition of NaOH, and melamine and urea are added in a molar ratio of 1:1.3-2 at a temp. under 323 esp. 308-318 K to produce a molar ratio of amino cpds. to formaldehyde of 1:1.5-1.9, and condensn. is carried out at 363-373 K upto a water-compatibility of 1:1-2 and the pH-value falls from 8.7-9.3 to 8.0-8.2 during the first 15-25 min. of condensation by the step wise or continuous addn. of NaOH and condensn. is terminated at pH 7.5-8.0. USE/ADVANTAGE - (I) are used in the impregnation of webs of paper used in the mfr. of laminated plastics. The prod. is inexpensive. |
| priorityDate | 1989-12-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 62.