Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1984-11-01
1985-10-15
Hoke, Veronica P.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524141, 524289, 524303, C08K 536
Patent
active
045475393
ABSTRACT:
Substituted succinic anhydride or succinate stabilizers of the formula I or II ##STR1## where R.sub.1 and R.sub.2 are independently alkyl, cycloalkyl, phenyl or aralkyl, R.sub.3 is hydrogen or methyl, R.sub.4 is hydrogen, lower alkyl or phenyl, R.sub.5 is hydrogen, alkyl, alkylthio, arylthio or the structure ##STR2## and R.sub.6 and R.sub.7 are independently hydrogen, alkyl; aryl or substituted aryl are useful as stabilizers for polymeric substrates, particularly polyolefins and rubber.
REFERENCES:
patent: 2952013 (1976-04-01), Hazard et al.
patent: 3078290 (1963-02-01), Hechenbleikner et al.
patent: 3281455 (1966-10-01), Steinberg
patent: 3465029 (1969-09-01), Beirne
patent: 3625978 (1971-12-01), Geering et al.
patent: 3637809 (1972-01-01), Kleiner
patent: 4446264 (1984-05-01), Cottman
Pastor Stephen D.
Spivack John D.
Ciba-Geigy Corporation
Hall Luther A.
Hoke Veronica P.
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