Dental composition from gold particles, terpineol and ethyl cellulose
US4326889A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 9, 1979 |
| Grant date | Apr 27, 1982 |
| Priority date | — |
| Expiry date | Oct 9, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C1/0466
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Essentially spherical gold particles are mixed with an evaporatable or combustible paste-forming material, for example terpineol and ethylcellulose, the gold being, by weight, 75% to 95%, spherical, and having a diameter of between 0.8 to 1.2 .mu.m, with a maximum particle diameter of 2 .mu.m. The gold is mixed with the additives to form a paste, just before being applied at a thickness of from between 5 to 30 .mu.m on a dental prosthesis, preferably about 10 to 20 .mu.m, and then fired at a temperature of between about 950.degree. C. to 1070.degree. C. for a period of between 2-5 minutes, preferably about 960.degree. to 1000.degree. C. of from between 2-3 minutes, providing an excellent base for application of a porcelain layer thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.