Phosphite stabilizers

Details Phosphite stabilizers Phosphite stabilizers

1981-10-14

1983-05-17

Hoke, V. P.

Chemistry of carbon compounds

Dipeptides, e.g., aspartame, anserine, carnosine, etc.

524151, C07F 9145

Patent

active

043839509

ABSTRACT:
Compounds of the general formula (I) ##STR1## in which R.sub.1 is an .alpha.-branched alkyl group having 3 to 12 carbon atoms, cyclohexyl, phenyl or .alpha.,.alpha.-dimethylbenzyl and R.sub.2 is methyl, isopropyl, tert.-butyl, tert.-pentyl, 1,1,3,3-tetramethylbutyl, nonyl, 1,1,3,3,5,5-hexamethylhexyl or .alpha.,.alpha.-dimethylbenzyl, only one of R.sub.1 and R.sub.2 being 1,1,3,3-tetramethylbutyl and at least one of R.sub.1 and R.sub.2 possessing at least 8 carbon atoms, and R.sub.3 is hydrogen or methyl, or R.sub.3 together with R.sub.2 is 1,1,3,3-tetramethyl-1,3-propylene, are suitable as stabilizers for organic material to protect it against thermo-oxidative and light-induced degradation.

REFERENCES:
patent: 2493597 (1950-01-01), Rothrock et al.
patent: 2733226 (1956-01-01), Hunter
patent: 2951052 (1960-08-01), Darby
patent: 2997454 (1961-08-01), Leistner et al.
patent: 3039993 (1962-06-01), Friedman
patent: 3189570 (1965-06-01), Paulin
patent: 3290392 (1966-12-01), Ecke et al.
patent: 3305520 (1967-02-01), Fritz et al.
patent: 3498946 (1970-03-01), Calkins
patent: 3960758 (1976-06-01), Witte et al.

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