http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-549496-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8c132a7966509f4dce95e19f9720d17c http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_bce9630f45e1627c64a53dabb71be6a8 http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_944b5c112bdac3c4e7667e4951fa2d3f |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09J5-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09J5-08 |
| filingDate | 1941-05-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1942-11-24-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-549496-A |
| titleOfInvention | Improvements in or relating to synthetic resin adhesives |
| abstract | 549,496. Phenol-aldehyde, urea aldehyde ; melamine-aldehyde resins. AERO RESEARCH, Ltd., BRUYNE, N. A. DE., and HUBBARD, D. A. May 19, 1941, Nos. 6438 and 13173. [Class 2 (iii)] In uniting wood veneers and like cellulosic surfaces by means of a synthetic resin adhesive, comprising urea-formaldehyde, melamine formaldehyde thio-urea-formaldehyde or phenolformaldehyde condensation products the resin is beaten into a foam and applied as such to the surfaces. The resins may be mixed with a froth forming substance, e.g. saponin. In examples melamine-formaldehyde resin, ammonium chloride (as foam hardener) saponin and water are stirred and placed in a flask where they are beaten up with a revolving wire whisk, the beating being continued until the volume of the mixture has increased by about one and a half to two and a half times. Examples of suitable resin adhesives are (1) 1 mol. melamine and 2 mols. formaldehyde are mixed, diluted with water and boiled under reflux, a mixture of formaldehyde and water being added slowly through the reflux condenser ; after refluxing for 45 mins. the mixture is vacuum distilled to give a syrupy liquid which can be diluted with its own volume of water before precipitating the resin ; (2) 27 parts urea and 77 parts 40 per cent. formalin are mixed with a buffer solution to give a pH value of 6 ; the mixture is refluxed and sodium acetate added ; (3) 60 gs. melamine-formaldehyde syrup, 40 gs. urea formaldehyde syrup and 11.5 gs. cassava starch ; (4) An 80 per cent. solution of phenol in water is added to a mixture of formaldehyde and potassium hydroxide and the mixture refluxed and divided into products tolerating different amounts of water which are mixed in proportions giving a final water toleration of one part water to two parts resin. 10 per cent. of a 10 per cent. solution of saponin is added. The foam may be applied to the surfaces by the usual rubber rollers. Specification 551,488, [Group II] is referred to. Reference has been directed by the Comptroller to Specification 446,442. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111718679-A |
| priorityDate | 1941-05-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 41.