http://rdf.ncbi.nlm.nih.gov/pubchem/patent/PL-161849-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_424db9d56b06a23aed410fcf5df652f3 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F- http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F2-00 |
| filingDate | 1989-08-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1993-08-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | PL-161849-B1 |
| titleOfInvention | Method to prevent the formation of a polymer crust PL |
| abstract | PURPOSE:To effectively prevent polymer scale from depositing on the wall of a polymerizer in which an ethylenically unsaturated monomer is polymerized by applying an aqueous coating solution containing an anionic dye and a cationic dye. CONSTITUTION:In polymerizing an ethylenically unsaturated monomer such as vinyl chloride, an aqueous coating solution containing a water-soluble anionic dye (A) (e.g., C.I. Acid Black 2) and a water-insoluble cationic dye (B) (e.g., C.I. Solvent Black 3) and having a controlled pH <=7 is applied to the inside wall of the polymerizer and the areas with which the monomer is in contact during the polymerization, such as impellers, and dried to form a film which can prevent scale deposition. The concentration of the dyes in the coating solution is desirably 0.05-2wt.%, and the A to B weight ratio is desirably 100/3-100/100. The coating amount is usually about 0.001-5g/m<2> (in a dry state). |
| priorityDate | 1988-08-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 137.