http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2002226561-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_4aed57d59684e92f3e90efeb732e72c2 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G61-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G01N31-22 |
| filingDate | 2001-02-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_17530b8662104b0525f568731e4831db |
| publicationDate | 2002-08-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2002226561-A |
| titleOfInvention | Phenol-hydroxybenzyl alcohol-based pH discoloring polycondensate and its preparation |
| abstract | (57) [Summary] (with correction) [PROBLEMS] To provide a pH-discoloring resin which changes color from weakly acidic to weakly alkaline. A phenol and a condensing agent, hydroxybenzyl alcohol, are subjected to dehydration polycondensation in the presence of an acidic catalyst, in the absence of a solvent or in an organic solvent, with heating and stirring under an inert gas flow, reduced pressure if necessary, and reduced pressure if necessary. A resin having the following structure is obtained. (Wherein, R1 is a methylene bond, a methyl group, a hydroxyl group, an aldode group, or a methylene bond, and the bonding position is ortho, meta, or para to the hydroxyl group of the benzene ring. R2 and R3 are hydrogen atoms Or a methylene bond, and the bonding position is ortho or para to the hydroxyl group of the benzene ring.) |
| priorityDate | 2001-02-06-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 84.