http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-669896-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_315d611c240458b1308de8455144105a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B23-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B23-04 |
| filingDate | 1949-01-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3d24cdf456027995e392c541efbfb667 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_923bf6b5f705525fa33090d48afdec86 |
| publicationDate | 1952-04-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-669896-A |
| titleOfInvention | Improvements in or relating to a process for improving the whiteness or colour of materials |
| abstract | Oxacyanines of the general formula <FORM:0669896/IV (b)/1> where R1 and R2 are alkyl groups and R3 to R8 inclusive are hydrogen or halogen atoms or alkyl, alkoxy or substituted amino groups and X is an acid radical, are prepared by condensing a quaternary salt of an appropriate 2-methyl benzoxazole with a quaternary salt of an appropriate 2-alkylthio benzoxazole in the presence of a base such as pyridine. A number of compounds of the above formula are specified including those in which one or more of the groups R are hydrogen, chlorine, bromine, methyl, ethyl, methoxy, acetamino or sulphamyl. The Provisional Specification refers also to similar compounds in which any two adjacent carbon atoms are fused into a benzene ring or ring containing a methylene dioxy residue, and specifies 4,5- and 6, 7-benzo derivatives.ALSO:Fibrous materials made of or containing fibres of cellulose esters or polyamides are improved by applying a fluorescent compound of the general formula <FORM:0669896/IV (c)/1> where R1 and R2 are alkyl groups and R3 to R8 are hydrogen atoms, halogen atoms or alkyl, alkoxy, or substituted amino groups, and X is an acid radical, which compound is colourless in alcoholic solution. The compound enhances the whiteness of undyed materials and the brightness of dyed materials and it may be applied from a dilute aqueous solution. Many suitable compounds are specified and the following examples are given: (1) acetate silk is treated in a dilute aqueous solution of 3,31,5,51,6,61-hexamethyloxacyanine p-toluenesulphonate; (2) nylon is treated in a bath containing 3,31,5,6 - tetramethyloxacyanine p - toluenesulphonate or 3,31,5,51,6,61-hexamethyl oxacyanine p-toluenesulphonate; (3) perlon yarn is introduced into a dilute aqueous solution of 3,31,5,51,6,61-hexamethyloxacyanine p-toluenesulphonate; and (4) satin cloth having acetate warp and viscose crepe weft is treated with a solution containing 3,31,5,6-tetramethyloxacyanine p-toluenesulphonate and Glauber salt. The Provisional Specification refers also to the use of compounds of the above formula in which two adjacent carbon atoms are fused into a benzene ring or into a ring containing a methylenedioxy residue, e.g. 3,31,51,61-tetramethyl-4,5-benzoxacyanine bromide, 3,31-diethyl - 51,61 - dimethyl - 4,5 - benzoxacyanine bromide and 3,31-diethyl-6,7-benzoxacyanine iodide. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-1010490-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-1094696-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4105399-A |
| priorityDate | 1949-01-14-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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