Method for stabilizing synthetic thermoplastic materials against

Details Method for stabilizing synthetic thermoplastic materials against Method for stabilizing synthetic thermoplastic materials against

1991-06-10

1993-05-11

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 98, 524100, 524106, 540553, 549 59, 544115, 544194, 544207, 544219, 544371, 5483651, 5483701, 5483704, 5483657, 5483641, C08K 5357, C08K 53492, C08K 53472, C07D23108, C07D24300

Patent

active

052101185

ABSTRACT:
The present invention relates to a novel method for stabilizing synthetic thermoplastic materials against thermal degradation, which comprises incorporating in said materials one or more compounds of the formula (I) ##STR1## in which R.sub.1 is unsubstituted or substituted phenyl, n is e.g. 1, 2 or 3, and, when n is 1, R.sub.2 is e.g. --COR.sub.3, --COOR.sub.4 or --CO-N(R.sub.5)R.sub.6 in which R.sub.3 is e.g. C.sub.4 -C.sub.17 alkyl, R.sub.4 is e.g. C.sub.4 -C.sub.18 alkyl, cyclohexyl or t-butylcyclohexyl, R.sub.5 and R.sub.6 which can be identical or different are e.g. C.sub.2 -C.sub.8 alkyl or cyclohexyl, and, when n is 2, R.sub.2 is e.g. --CO--R.sub.10 --OC, --COO-R.sub.11 --OOC-- or --CONH--R.sub.12 --NHCO- in which R.sub.10 is e.g. C.sub.2 -C.sub.8 alkylene, R.sub.11 is e.g. C.sub.4 -C.sub.6 alkylene and R.sub.12 is e.g. C.sub.4 -C.sub.6 alkylene, and, when n is 3, R.sub.2 is e.g. benzenetricarbonyl.
Several compounds of the formula (I) are new.

REFERENCES:
patent: 3531423 (1970-09-01), Stokes et al.
patent: 4491630 (1985-01-01), Ishikawa et al.
patent: 4845016 (1989-07-01), Ishikawa et al.
patent: 5079285 (1992-01-01), Kluttz
CA: 103:45739j (1985).
CA 113:106495g (1990).
CA 102:70094g (1985).
CA 103:79402j (1985).
CA 101:161,153w (1984).
CA 108:177005e (1988).
CA 108:213839r (1988).
CA 109:14586b (1988).
CA 108:104015y (1988).
CA 110:163473k (1989).

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