Alkanolamine ester of 1,1-biphenyl-2,2-diyl-and alkylidene-1,1-biphenyl-2,2-diyl-cyclic phosphites
US4374219A · kind A · utility
35Cited by
5References
8Claims
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Assignee
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Key dates
| Filing date | Jul 23, 1981 |
| Grant date | Feb 15, 1983 |
| Priority date | — |
| Expiry date | Jul 23, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2223/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The title compounds are prepared by reacting alkylated 1,1'-biphenyl-2,2'-diol or alkylated 2,2'-alkylidene-bis-phenol with phosphorus trichloride in an organic solvent and then reacting the intermediate phosphorochlorodite with an alkanolamine. Said phosphites are useful as stabilizers of organic polymers and lubricating oils, especially as processing stabilizers for polyolefins, elastomers, polyesters and polycarbonates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.