http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-300942-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_7b04f5b6a02051c94d6eaf190b751ed2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B15-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B15-00 |
| filingDate | 1927-05-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1928-11-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-300942-A |
| titleOfInvention | Manufacture of mixed acid esters of cellulose or esters of cellulose ethers |
| abstract | 300,942. Imray, O. Y., (I. G. Farbenindustrie Akt.-Ges.). May 12, 1927. Cellulose esters and ether-esters, and processes for making filaments and films from.-Mixed esters of cellulose and esters of cellulose ethers are made by treating a cellulose ester or ether containing reactive hydroxyl groups such as commercial cellulose acetate or ethyl cellulose, swollen or dissolved in an organic solvent, with an inorganic acid chloride in the presence of an acid-binding agent, or with an organic acid chloride in the presence of an acid-binding agent other than pyridine, or with a simple or mixed anhydride, other than acetic anhydride, in the absence of a promoter of the reaction, or with an acid amide or acid ester. The use as starting material of nitrocellulose or of a cellulose ether soluble in allsali is excluded. Acid-binding agents for use with acid chlorides are organic bases, ammonia, inorganic oxides such as magnesia, and carbonates. By the use of inorganic acid chlorides radicles of silicic acid, phosphoric acid, phosphorous acid, sulphuric acid, antimonious acid, &c. may be introduced. In many cases the anhydride or acid amide serves both as the reagent and the swelling-agent or solvent. By the use of mixed acid anhydrides such as boro-acetic acid anhydride and lauric-myristic acid anhydride, there are obtained mixed esters of constant composition. The estertincation may be carried out without separation of the cellulose derivative used as the starting material, from its reaction mixture. In examples, a cellulose acetate-phosphite is obtained by mixing with an acetone solution of cellulose acetate, an acetone solution of phosphorous trichloride in this solvent; a solution of ethyl cellulose in xylene is mixed with silicon tetrachloride diluted with chloroform and pyridine, to produce an ethyl cellulose silicate; cellulose acetate is dissolved in molten stearic anhydride; ethyl cellulose is heated with myristic anhydride, solution of the ether gradually taking place; cellulose acetate swollen with pyridine, is heated with monophenylphosphate to produce a cellulose acetate-phosphate; ethyl cellulose is dissolved in molten benzamide; cotton is added to and heated with a mixture of xylene, pyridine and lauric chloride, and afterwards phosphorus oxychloride is added and the mixture is further heated, cellulose laurate-phosphate being finally obtained ; to the reaction mixture obtained in the production of ethyl cellulose is added a further quantity of caustic soda and a solution of phosphorus oxychloride in benzene, the final product being ethyl cellulose phosphate. The products obtained are suitable for the manufacture of lacquers, photographic films, coatings for films, and artificial threads. Specification 219,926 is referred to. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2423883-A |
| priorityDate | 1927-05-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 70.