Hindered phenyl phosphites
US4094855A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 30, 1976 |
| Grant date | Jun 13, 1978 |
| Priority date | — |
| Expiry date | Jul 30, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/51
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Compounds of the formula ##STR1## WHEREIN R.sub.1 and R.sub.2 are independently alkyl or hydrogen, provided only one of R.sub.1 and R.sub.2 is hydrogen, PA1 R.sub.3 is --(A).sub.q --COOR.sub.4 or CN, where A is alkylene, PA1 R.sub.4 is alkyl, phenyl or alkyl substituted phenyl, PA1 q is 0 or 1, PA1 m and n are each 1 or 2, the values of m and n being such that the trivalent state of P is satisfied, PA1 R is (a) halogen, (b) hydroxyl, provided that n is 1 when R is hydroxyl, (c) --XR.sub.5 wherein X is S or O, and PA1 R.sub.5 is alkyl, phenyl, alkyl substituted phenyl, or when X is O, R.sub.5 is alkanoyl, benzoyl, or alkyl substituted benzoyl, (d) a group of the formula ##STR2## wherein R.sub.6 is phenylene, alkyl substituted phenylene, or alkylene, X is as defined above, and m and n are each 1, (e) a group of the formula ##STR3## wherein R.sub.7 is hydrocarbyldiacyl, R.sub.1, R.sub.2 and R.sub.3 are as defined above, and m is 2 and n is 1, or (f) a group of the formula ##STR4## wherein R.sub.1, R.sub.2 and R.sub.3 are as defined above, and m and n are each 1, are suitable for stabilizing organic material against thermal, oxidative and ultraviolet light degradation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.