http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-350310-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9799ffcda2dbb45041a5ab0fd08dd5fe |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08B3-24 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08B3-24 |
| filingDate | 1930-07-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1931-06-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-350310-A |
| titleOfInvention | An improvement in the manufacture of cellulose acetate |
| abstract | Cellulose acetate produced in known manner and hydrolysed to the desired extent is treated with dilute hydrochloric acid prior to precipitation. Cellulose acetate thus treated leads to the formation of films free from haze which are particularly suitable for photographic purposes. The strength of the hydrochloric acid and the time of treatment are such that no further hydrolysis occurs. In general, a concentration not exceeding 1 per cent of hydrochloric acid based on the weight of the solution is used. In an example, a cellulose acetate dope which has been hydrolysed to the desired extent is stirred for half an hour with hydrochloric acid mixed with acetic acid. It is then poured into a bath of dilute acetic acid and the product is washed and dried. The cellulose acetate thus produced, when dissolved in acetone with a plasticizer and spread on a forming-surface, gives a transparent film free from haze. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1422244-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0943626-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7122660-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-1129610-C http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7148344-B2 |
| priorityDate | 1929-08-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 21.