Composition containing a mannich base of a partially sulfurized hindered phenol mixture
US5166439A · kind A · utility
3Cited by
11References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1989 |
| Grant date | Nov 24, 1992 |
| Priority date | — |
| Expiry date | Nov 24, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A sulfurized, phenolic antioxidant having a low chlorine content and good copper corrosion properties is prepared by reacting a partially sulfurized mixture of reactive, hindered phenols with formaldehyde or formaldehyde and an amine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.