| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c2e66bf3565193fc7c191c8d35230946 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G12-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09J161-24 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G12-12
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09J161-24 |
| filingDate |
1976-05-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2b81aa11c893649b4c8af5ba9ddfef4b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_38a57879bbe9025fc62ee044e9e644d8
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5d9162b9ada4142049a3b6747d4460e5
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a48102886a3d102c97a7513fe902cd60
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_32c75adcbe6dbb463bf46cfc08165783
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e2a338d73b78e9b3520623f111f16353
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b47e2804d27266572a7d892346455c8e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_bccb95cc1e208b3410bc6e9910a25c61
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8e02637a291e689b9066f84823226e3c |
| publicationDate |
1977-02-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
DE-2623607-A1 |
| titleOfInvention |
PROCESS FOR THE PRODUCTION OF UREA-FORMALDEHYDE-RESIN GLUES FOR CHIPBOARD PRODUCTION |
| abstract |
Urea-formaldehyde binders for wood chipboard having reduced emission are made by (a) condensing urea (U) with formaldehyde (F) in the presence of ammonia at >100 degrees C in aq. soln. using a mol ratio U/F of 1:1.8-1:2.5 and a mol ratio U/NH3 of 1:0.04-1:0.2 with backflowing mixing for 10-60 mins. at 100-140 degrees C and a pressure of 1-4 atm., (b) in a second stage, condensing at 40-80 degrees C with the pH adjusted to 7-8 with an alkali and using a U/F ratio of 1:1.4-4:1.6, opt. with backflow mixing and (c) concentrating the condensate at 40-80 degrees C under a pressure of 40-600 mm Hg. Prod. gives very low concn. of free formaldehyde in the atmos. in use to comply with pollution and toxicity requirements. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-9639453-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5674971-A |
| priorityDate |
1975-07-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |