http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-576134-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_28a660c95866e78384d66dc23f57146f |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09D131-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09D131-04 |
| filingDate | 1943-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1946-03-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-576134-A |
| titleOfInvention | Improvements in and relating to waterproof coating |
| abstract | A moisture-proof coating composition comprising an aqueous emulsion of polyvinyl acetate produced by emulsion polymerization of vinyl acetate in presence of at least one organic hydrophilic colloid, and a wax having a melting point of between 47 DEG F. and 140 DEG F. so that when a film is laid down and subjected to a hot air blast, a surface bloom is provided protecting the polyvinyl acetate, said wax being present in an amount from 12 to 40 per cent on the total charge, as discrete substantially uncrystallized particles, said polyvinyl acetate being present in amounts between 30 and 70 per cent by weight of the emulsion. It is preferred that the wax particles are of sizes between 4 m and 20 m and the preferred wax is paraffin wax. Oleagineous softeners such as hydrogenated cotton seed oil and petroleum jelly, and plasticisers such as butyl phthalyl butyl glycollate and methyl phthalyl ethyl glycollate, surface tension depressants, emulsifying agents, e.g. gum tragacanth and catalysts, e.g. benzoyl peroxide, may be present. The coating composition is prepared by taking the emulsion in a heated state after the addition of the wax, whereby the wax is liquefied, and the emulsion is cooled slowly with stirring, whereby the wax remains as a phase of the emulsion in small discrete substantially uncrystallized particles. Films may be produced from these compositions as also may be articles coated with the films. Examples are given of these compositions, films and film-coated articles and their comparative moisture-proofing discussed. Specifications 568,884 and 568,886 are referred to. |
| priorityDate | 1942-11-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 23.