http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6458870-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2baf849d216e689ecc40ccc931a7a7bc |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G12-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B28-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G12-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B24-223 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G12-34 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B24-22 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B28-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G12-32 |
| filingDate | 2000-10-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2002-10-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6697d9da4a844768dadd90aeaa14fe32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_537af452647e24cce15b32fd29d0baaf http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_56c13679ccdca1802e31b5e727cb250f http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f87413d50f35f763f1e13d1b3ef22941 |
| publicationDate | 2002-10-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-6458870-B1 |
| titleOfInvention | Process for preparing an aqueous solution of sulfanilic acid modified melamine-formaldehyde resin and a cement composition |
| abstract | The present invention relates to a process for preparing an aqueous solution of sulfonated melamine-formaldehyde resin, and a cement composition in which the solution and a setting retarder are added to a concrete, a mortar, a cement paste or the like. And the process comprises the following step (A), step (B) and step (C):Step (A): a step of adjusting an aqueous solution containing melamine (a), formaldehyde (b), sulfanilic acid (c) and an alkali substance (d) to (a):(b):(c)=1:2.5-3.5:0.5-1.5 in molar ratio and its pH to 8.0-13.5, and thereafter heating the aqueous solution at 50-90° C. to conduct the reaction until free sulfanilic acid decreases to 40-90 mol % of the amount of sulfanilic acid charged;Step (B): a step of adding an inorganic acid to the reaction liquid obtained in the step (A) to adjust its pH to 6.0-8.0, and thereafter heating the reaction liquid at 50-90° C. to conduct the reaction until free sulfanilic acid decreases to 20-60 mol % of the amount of sulfanilic acid charged;Step (C): a step of adjusting a pH of the reaction liquid obtained in step (B) to 7.0-13.5. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104119024-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102173634-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-102173634-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110354767-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-110354767-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104119024-B |
| priorityDate | 1998-10-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 77.