http://rdf.ncbi.nlm.nih.gov/pubchem/patent/NL-8003450-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_020b389b8e29740f8a5f0317424300b7 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B11-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B41M5-1455 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/F02K1-32 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/F02K1-32 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B41M5-145 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B11-24 |
| filingDate | 1980-06-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1980-10-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | NL-8003450-A |
| titleOfInvention | METHOD FOR PREPARING CHROMOGENIC MIXTURES, AND COPY SHEETS INCLUDING SUCH MIXTURE |
| abstract | Colourless marking composition which becomes coloured on contact with an acidic substance contains two colour formers, first being a fluorane of general formula: (in which R is H, nitro, or amino, R is H, methyl, ethyl, R2 is phenyl which may contain p-methyl or p-ethyl or is a -CH2-R3 group where R3 is H, phenyl, acetyl, benzoyl, methoxy, allyl, carboethoxy, N,N-dimethylamino or methyl, when R2 is -CH2R3, R is H. The second colour former is either 3:3-bis-(1-ethyl-2-methyl-indol-3-yl)phthalide, 3'-diethylamino-6':7'-methylenedioxy fluorane, or fluoranes of formula above with R=H and a) instead of NR1R2 a-N(R4)COCH3 gp. where R4 is H, methyl, ethyl, phenyl or o-carbonethoxyphenyl or b) the 6':7' positions being filled by a benzo or pyridino group. The ratio of the 1st to 2nd colour former is from 1 to 5.1. Comp. is used for pressure sensitive papers. It gives better light resistance and the developed colour can be copied by xerographic methods. |
| priorityDate | 1970-11-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 61.