http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-182820-A
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B3-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B3-10 |
| filingDate | 1921-03-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1922-09-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-182820-A |
| abstract | Cellulose butyrate is prepared by subjecting cellulose impregnated with a catalyst to the action of an acylating-bath containing butyric anhydride and butyric acid. The cellulose may be impregnated with the catalyst before or during the butyrating process. Impregnation with the catalyst may be carried out in the presence of a carrier such as acetic acid, or butyric acid preferably containing a small proportion of water and to which has been added a solvent such as methyl, ethyl or butyl alcohol, acetone, diacetone alcohol, or ethyl acetate, to prevent the separation of the bath into layers. After impregnation the excess of the bath is removed by pressing, and the moist mass then treated with the butyrating-bath which preferably contains 465 parts of butyric anhydride and 400 parts of butyric acid; the reaction is allowed to proceed until a butyrate of the desired solubility is obtained; in certain cases the reaction is accelerated by the addition of a further quantity of sulphuric acid after the product shows a solubility in chloroform, the reaction being continued until a product soluble in alcohol-benzene is obtained. The butyrate is soluble in alcohol-benzol, acetylene tetrachloride, acetone, ethyl acetate, carbolic acid, hot alcohol and benzol, alcohol-carbon tetrachloride, and hot solvent naphtha; and it may be employed in the manufacture of plastics, transparent sheets and films, artificial silk, lacquers, dopes, and artificial leather. Specifications 161,564 and 167,143 are referred to. |
| priorityDate | 1920-04-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 41.