5-Membered cyclic phosphonates and compositions thereof
US4439564A · kind A · utility
5Cited by
3References
29Claims
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Assignee
Inventor
Key dates
| Filing date | Sep 29, 1982 |
| Grant date | Mar 27, 1984 |
| Priority date | — |
| Expiry date | Sep 29, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/3477
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
2-[Alkyl substituted-phenoxy]-2,3-dihydro-1,2-benzoxaphosphole 2-oxide, cyclic phosphonates prepared, for example from hindered phenols and ortho-methylolphenols, are effective heat stabilizers and antioxidants for organic materials subject to degradation by heat, oxygen and the like, and result in effective stabilizer systems when combined with hydroxyphenylalkylenyl isocyanurates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.