Phenolic antioxidant composition
US5009802A · kind A · utility
1Cited by
9References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1989 |
| Grant date | Apr 23, 1991 |
| Priority date | — |
| Expiry date | Nov 29, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A partially sulfurized, phenolic antioxidant having good copper corrosion properties is prepared by reacting a liquid mixture of phenols, which mixtures includes at least one reactive, hindered phenol, with sulfur chloride in proportions to provide from about 0.3 to 0.7 gram atoms of sulfur per mole of reactive phenol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.