Preparation of bismuth dithiocarbamates
US5840664A · kind A · utility
5Cited by
17References
1Claims
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Key dates
| Filing date | Jan 23, 1997 |
| Grant date | Nov 24, 1998 |
| Priority date | — |
| Expiry date | Jan 23, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2010/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A novel method is disclosed for preparation of bismuth dithiocarbamates by an exchange reaction between a bismuth carboxylate and a metal dithiocarbamate. The metal dithiocarbamate can be added to the reaction or prepared in situ by reacting a secondary amine and carbon disulfide in the presence of metal oxide, metal hydroxide or a tertiary amine. The reaction products are useful as extreme pressure additives when incorporated in lubricants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.