http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1272928-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2b5938741c94023b10e1ec1a6edd3b00 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J2329-14 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B32B27-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08F8-48 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08J9-28 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B32B27-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08F8-28 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08J9-00 |
| filingDate | 1970-06-04^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1972-05-03^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1272928-A |
| titleOfInvention | Process for the production of porous polyvinyl acetals |
| abstract | 1,272,928. Porous polyvinyl acetals. KANEGAFUCHI BOSEKI K.K. 4 June, 1970 [5 June, 1969], No. 27057/70. Headings C3C and C3P. A porous polyvinyl acetal is made by acetalizing an aq. solution of polyvinyl alcohol with an aldehyde and an acid catalyst, in the presence of 2-120% by wt. (based on the alcohol) of sodium iodide, phosphate, sulphate or chloride, ammonium sulphate or chloride, potassium sulphate or chloride, or aluminium or zinc sulphate ; washing the resultant product with water and drying it. The aldehyde may be formaldehyde. The alcohol may be a saponified polyvinyl acetate. The catalyst may be sulphuric, hydrochloric, phosphoric or hydrobromic acid. The acetalization may be carried out in the presence of a pore-forming agent, e.g. corn or potato starch, dextrin or a nonionic or anionic surfactant, e.g. a polyoxyethylene glycol ether of lauryl alcohol. |
| priorityDate | 1969-06-05^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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