http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-974344-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b73bb5b611ad02b686a7967bc6ca3412 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S430-162 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S430-165 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10S428-913 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C1-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B27-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C1-61 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B26-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D277-82 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B26-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B27-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B26-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B26-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D277-82 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-52 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-61 |
| filingDate | 1960-10-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1964-11-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-974344-A |
| titleOfInvention | Heat sensitive copy papers |
| abstract | 974, 344. Thermographic copy sheets. MINNESOTA MINING & MANUFACTURING CO. Oct. 19, 1960 [Oct. 19, 1959], No. 35879/60. Heading G2C. A thermographic copy sheet capable of undergoing visible change on brief contact with a metal test bar heated to a temperature with the approximate range of 90 to 150‹C. comprises a thin flexible sheet including a heat-sensitive layer formed from (a) a normally solid condensation product of a heterocyclic hydrazone and/or the hydrochloride salt thereof and an amine-reactive organic compound, and (b) a normally solid oxidizing agent and including an azo coupler component; either as a portion of the component (a) or as a separate component, or as a reaction product of the reaction between component (a) and the oxidizing agent, said components (a) and (b) being maintained in physically distinct, chemically non-reactive relationship but becoming chemically inter-reactive on heating. Typical examples of the hydrazone condensation products which are described and claimed in Specification 974,345 are hydrazones of the formula or azines of the formulae wherein Z completes a substituted or unsubstituted carbocyclic ring; R is alkyl; Y is -S-, -Se-, -OR # R# H# H# @ R# aryl group; V is -CO-;-CS-;-SO2-; W is alkyl, aryl, alkoxy, alkoxyalkyl, aryloxyalkyl, amino, arylamino or, substituted aryl with or without an active coupling position on an aromatic ring, with the further provision that when W is arylamino V is -CS-. The hydrazones I either may be such as to require the use of a separate azo coupler component, e.g. -VW is acetyl or other simple organic acid radical, or may include an azo coupler component radical, e.g.-V-W may be 1-hydroxy-2- naphthoyl-, or an aryl thiosemicarbazone radical. With azines of formula II or III the coupler component may result from the reaction of the azine and the oxidizing agent. Separate couplers may be used in any case and, in addition to the usual azo couplers of which numeral examples are given, the hydrazone-coupler condensation-products I may be used. Inorganic oxidizing agents may be used but the preferred oxidizing agents are-organic compounds having a chlorine or, less preferably, a bromine atom attached to a nitrogen atom. Fusible mild reducing agents such as benzoin may be included in the material to lower the copying temperature and improve the stability of the copy sheet. The components of the heat-sensitive material may be-dispersed in solutions. of binders such as styrene-isobutylene copolymer in heptane or toluene, polyvinylpyrrolidone in water containing a non-ionic dispersing agent, ethyl cellulose in alcohol or the may be incorporated without a separate binder within a fibrous web e.g. by impregnation. A transparent paper support may be employed and to provide protection for the heatsensitive layer and an opaque white background to improve contrast a thin covering layer as of titanium dioxide in a polymeric binder may be provided. Inert pigments or fillers may be included in the heat-sensitive layer to enhance contrast. |
| priorityDate | 1959-10-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 48.