http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-368315-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fe25971fc1c9d7138172cc8ff1228176 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B3-36 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B3-36 |
| filingDate | 1930-10-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1932-02-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-368315-A |
| titleOfInvention | Vat dyestuffs and a process of preparing the same |
| abstract | Dibenzanthrone dyes are made by etherifying Bz 2 : Bz2<1>-dihydroxy- or Bz2-hydroxy-Bz2<1> alkoxy-dibenzanthrones with an alkylating agent of the general formula Y-CH2-CH2-X-CH2-CH2-Z, where X is an oxygen atom or imino group, and where Y and Z both represent strong acid residues, e.g. chlorine, bromine, sulphate or arylsulphonate, or one of them represents a strong acid residue, while the other represents an alkoxyl group. In cases where products containing free hydroxyl groups are formed, the fastness to acid may be increased by further alkylation, e.g. by methylation. The products dye in green shades, the dyeings being in many cases substantially yellower in shade than those from Bz2 : Bz2<1>-dimethoxydibenzanthrone. In examples, Bz2 : Bz2<1>-dihydroxydibenzanthrone is alkylated with (1) the di-p-toluenesulphonic ester of diethyleneglycol under varying conditions; the product in one instance is methylated by treating with p-toluenesulphonic methylester; (2) with the p-toluenesulphonic esters of diethyleneglycol-mono-methyl-, mono-ethyl-, and mono-nbutyl ethers; (3) with the di-p-toluenesulphonic ester of diethanolamine, (4) with dibromethylether and (5) with dichlorethylether. Bz2-hydroxy-Bz2<1>-methoxydibenzanthrone is also specified as a starting material. Specifications 14498/12 193,431, and 273,247, [all in Class 2 (iii), Dyes &c.], are referred to. p-Toluenesulphonic esters.--The above-mentioned p-toluenesulphonic esters are made by the action of p-toluenesulphonic chloride on the corresponding hydroxy compounds. The Specification as open to inspection under Sect. 91 (3) (a) is not restricted to the treatment of Bz2 : Bz2<1>-derivatives, but includes the use as parent materials of hydroxy-dibenzanthrones in general, including substituted hydroxydibenzanthrones, e.g. halogenated dihydroxydibenzanthrones. It also includes the use of alkylating agents of the general formula in which X represents a sulphur atom, or in which one of the substituents Y, Z may represent the group OR, where R stands for an aryl, aralkyl or acyl group. This subject-matter does not appear in the Specification as accepted. |
| priorityDate | 1929-11-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 36.