Chroman derivatives and stabilized polypropylene composition

Details Chroman derivatives and stabilized polypropylene composition Chroman derivatives and stabilized polypropylene composition

1981-02-26

1985-04-16

Chan, Nicky

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

Synthetic resins

Processes of preparing a desired or intentional composition...

549404, 549405, 549407, C08K 509, C07D31172

Patent

active

045116857

ABSTRACT:
Chroman derivatives of the general formula I ##STR1## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each H or C.sub.1 -C.sub.4 -alkyl, R.sup.5 is C.sub.10 -C.sub.30 -alkyl or C.sub.10 -C.sub.30 -alkenyl, X and Y are each O, NH or S, m is 0, 1, 2 or 3 and n and r are each 0 or 1, the preparation of compounds I by various methods known per se, and the use of the compounds as stabilizers for organic materials.

REFERENCES:
patent: 3947473 (1976-03-01), Scott et al.
patent: 4051153 (1977-09-01), Cohen et al.
patent: 4150050 (1979-04-01), Cohen

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