Malonate derivatives as stabilizers for organic materials

Details Malonate derivatives as stabilizers for organic materials Malonate derivatives as stabilizers for organic materials

1981-06-08

1983-01-18

Schwartz, Richard A.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524102, 542427, 546187, 546188, C08K 534, C07D40112

Patent

active

043692753

ABSTRACT:
Malonates of the formula I ##STR1## in which R.sub.1 is hydrogen or C.sub.1 -C.sub.4 -alkyl, R.sub.2 is C.sub.1 -C.sub.12 -alkyl, C.sub.3 -C.sub.4 -alkenyl, benzyl or phenyl which is optionally substituted by C.sub.1 -C.sub.8 -alkyl or C.sub.1 -C.sub.8 -alkoxy, or is cyano, R.sub.3 is C.sub.1 -C.sub.12 -alkyl, C.sub.3 -C.sub.4 -alkenyl or benzyl and X denotes hydrogen, oxyl, C.sub.1 -C.sub.12 -alkyl, C.sub.3 -C.sub.6 -alkenyl, C.sub.3 -C.sub.4 -alkinyl, C.sub.2 -C.sub.21 -alkoxyalkyl, C.sub.7 -C.sub.8 -aralkyl, 2,3-epoxypropyl, an aliphatic acyl group with 1-4 C atoms or one of the groups --CH.sub.2 COOR.sub.4, --CH.sub.2 -CH(R.sub.5)--OR.sub.6, --COOR.sub.7 or --CONHR.sub.7, in which R.sub.4 is C.sub.1 -C.sub.8 -alkyl, C.sub.3 -C.sub.6 -alkenyl, phenyl, C.sub.7 -C.sub.8 -aralkyl or cyclohexyl and R.sub.5 is hydrogen, methyl or phenyl and R.sub.6 denotes hydrogen or an aliphatic or aromatic, araliphatic or alicyclic acyl group with 1-18 C atoms, in which the aromatic part can optionally be substituted by chlorine, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.8 -alkoxy and/or by hydroxyl, and R.sub.7 is C.sub.1 -C.sub.12 -alkyl, cyclohexyl, phenyl or benzyl as stabilizer for organic polymers.

REFERENCES:
patent: 3640928 (1972-02-01), Murayama et al.
patent: 4021432 (1977-05-01), Holt et al.
patent: 4056507 (1977-11-01), Ramey et al.

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