http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108948283-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B2103-302 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F283-065 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G65-331 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C04B24-2605 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B103-30 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F4-40 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F283-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F220-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C04B24-26 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G65-331 |
| filingDate | 2018-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2020-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2020-10-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-108948283-B |
| titleOfInvention | A kind of phthalic anhydride modified polycarboxylate water reducer and preparation method thereof |
| abstract | The invention belongs to the technical field of concrete admixtures, and discloses a phthalic anhydride modified polycarboxylate water reducer and a preparation method thereof. The method comprises the following steps: performing an esterification reaction with phthalic anhydride and methallyl polyoxyethylene ether at a temperature of 50-70° C. to obtain a phthalic anhydride modified macromonomer, and under a redox system, the reaction temperature is 30-70° C. At 60° C., the phthalic anhydride modified macromonomer is copolymerized with acrylic acid, and stirring is maintained to make the mixing uniform, and the product is adjusted to a pH value of 6-7 to obtain a phthalic anhydride group-containing polycarboxylate water-reducing agent mother liquor. The phthalic anhydride modified polycarboxylate water reducing agent and the preparation method thereof of the present invention do not need separation and purification of the intermediate product modified macromonomer, the operation is simple, the reaction conditions are easy to control, and impurities are not introduced, and the synthesized polycarboxylate water reducing agent It has good dispersibility and good flow retention. |
| priorityDate | 2018-05-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 44.