http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-369097-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_805ed6a3d5337e4d5742c5673f555f90 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C08G75-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C08G75-16 |
| filingDate | 1931-06-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1932-03-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-369097-A |
| titleOfInvention | Improved manufacture of olefin-polysulphide plastics |
| abstract | A plastic body is obtained by incorporating a protective colloid with a dispersion of an olefine polysulphide, preferably during the formation thereof. To obtain the dispersion of the olefine polysulphide, a finely divided, insoluble basic compound of an alkaline earth (such as a hydroxide, oxide or carbonate of calcium, barium or magnesium) may be incorporated with the mixture of olefine compound and polysulphide, and the protective colloid, preferably a protein, may be incorporated with the reaction mixture or dispersion. On coagulation of the dispersion, the protective colloid remains with the plastic. The polysulphide employed may be the polysulphide of an alkali, alkaline earth, ammonium or organic base, such as triethanolamine and the quantity of sulphur therein may vary from twice that in the normal sulphide up to the maximum, usually S5. In an example, a polysulphide is reacted with an olefine compound such as ethylene dichloride in presence of the dispersing agent such as magnesium hydroxide and the protective colloid, such as egg albumen. The magnesia may be added as magnesium chloride, preferably with the addition of a little alkali. The ethylene dichloride is preferably added last, in small quantities and under a reflux condenser. The final temperature of the mixture may be 190-195 DEG F. The latex produced may be washed by decantation with water. To coagulate the latex, it is first neutralized with an acid such as sulphuric or hydrochloric acid, washed with water by decantation, and flocculated by addition of a dilute alkali such as soda, potash or ammonia. Instead of egg albumen other colloids may be used, such as glue, casein, blood albumen, gelatin, hydrolysed starch, gums, dextrin, saponin and the like; and instead of ethylene dichloride there may be used formaldehyde, hexamethylene tetramine, a methylene dihalide, or a dihalide of a higher olefine such as propylene, butylene or amylene. The coagulated product may be milled in a rubber mill with compounding materials such as zinc oxide, carbon black, litharge, stearic acid, clay, &c., yielding a plastic and tacky mass which on heating to 212-300 DEG F. under pressure becomes resilient, tough and elastic having insulating and dielectric properties and insoluble in oils and organic solvents. It may be extruded in its plastic form to form tubes or the covering on electric conductors and may be pressed upon cotton, duck, or asbestos fabrics, being heated subsequently to harden the material. Reference has been directed by the Comptroller to Specification 359,000. |
| priorityDate | 1930-08-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 67.