http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-645203-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3e35d679be67f220a19a17a32a595dbe |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G16-0262 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G16-02 |
| filingDate | 1948-01-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1950-10-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-645203-A |
| titleOfInvention | Improvements in or relating to synthetic resinous products and methods of producing same |
| abstract | Resinous products suitable for use in moulding powders, castings, laminate, brake and clutch-linings, sand paper, fillers for hard rubber, grinding wheels, paints, electrical insulation and glues, are formed by reacting a mixture of furfuryl alcohol and formaldehyde under acid conditions. Catalysts specified are lactic, formic, acetic, sulphuric, hydrochloric phosphoric and chloracetic acids; dimethyl sulphate and sodium acid phosphate, a pH of 1.5 to 3.5 being preferred. The products may be mixed or copolymerized with vinyl acetate and/or chloride, lignin resins, and alcohol-soluble phenol-formaldehyde resins. There are specified as fillers: asbestos, wood flour, slate dust, sand, carborundum and iron oxide; as solvents: methyl and ethyl alcohols, furfuraldehyde, and water. While fusible the resins can be admixed with proteins, e.g. casein, gelatine, glue or blood albumen, or melted into Buna or polychlorisoprene rubbers or natural or reclaimed rubber, to increase their oil resistance. For storage the acid products are preferably made alkaline after the reaction. Temperatures above 100 DEG C. may be used by doing the reaction in an autoclave, or temperatures below 100 DEG C. can be used. To obtain an aqueous solution of resin the reaction must be stopped before condensation is advanced too far. In examples the furfuryl alcohol and formaldehyde are refluxed until separation of water begins, and the mixture is then dehydrated, or by stopping the reaction earlier, the resin is obtained in a hydrophilic state. An example (13) describes a reaction under anhydrous conditions of furfuryl alcohol, paraformaldehyde and lactic acid, all of which have been dehydrated. |
| priorityDate | 1942-03-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 35.