Phosphite stabilizer for lubricating base stocks and thermoplastic polymers
US8049041B2 · kind B2 · utility
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Key dates
| Filing date | Jun 27, 2008 |
| Grant date | Nov 1, 2011 |
| Priority date | — |
| Expiry date | Jul 7, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A substituted phosphite suitable for lubricating base stocks and thermoplastic polymers represented by the structure:wherein R1 is selected from the group consisting of C1-C22 alkyl and C4-C22 cycloalkyl; R2 and R3 are selected to form a C5-C18 aryl; and R4 and R5 are selected from the group consisting of H, C1-C22 alkyl, C2-C22 alkenyl, C4-C22 cycloalkyl, and C5-C8 aryl. The substituted phosphite may be combined with at least one primary antioxidant as well as other additives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.