| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9f2aa9565f6a60fddb5b4a47449ed278 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B41M5-3336
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C319-14 |
| classificationIPCAdditional |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C323-20 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C319-14
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B41M5-327
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B41M5-333 |
| filingDate |
1989-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate |
1992-04-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_110dc0e77aa9fc17cbf2fc7338e36534
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_34f0c0ef8ed06b5da3749969db4b08c9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d646d65864ba2a1bbb9d42467d7351ef
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_2c4c98044ecc14e5b446fa6b0cc446a4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b93d0542a6a2853f64a57b15cd4e506b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_91cb1f553247be24f7584cd917c5acbb |
| publicationDate |
1992-04-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
US-5102858-A |
| titleOfInvention |
Heat-sensitive recording materials containing high purity bis(4-hydroxyphenyl)sulfides |
| abstract |
In a process of producing high purity bis(4-hydroxyphenyl) sulfides which comprises reacting phenols with sulfur dichloride in organic solvents, the improvement comprising: reacting the phenols with sulfur dichloride in nonpolar organic solvents; removing partly or wholly the nonpolar organic solvents after the reaction; adding polar organic solvents to the reaction mixture to dissolve the reaction mixture therein at elevated temperatures; and crystallizing out the high purity bis(4-hydroxyphenyl)sulfides. n There is further provided a high performance heat-sensitive recording material which comprises high purity bis(4-hydroxy-3-methylphenyl)sulfide thus prepared and having a melting point in the range of from 123.9° C. to 124.9° C. as a developer and a fluoran compound as a color former. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005274549-A1 |
| priorityDate |
1988-06-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |