Hydroxphenylcarboxylic acid esters as stabilizers

Details Hydroxphenylcarboxylic acid esters as stabilizers Hydroxphenylcarboxylic acid esters as stabilizers

1991-08-23

1993-01-05

Killos, Paul J.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560 75, C07C 6988, C07C 6976

Patent

active

051772469

ABSTRACT:
The novel compounds of the formulae Ia and Ib ##STR1## in which the radicals R are identical or different and are a group of the formula II ##STR2## in which X is a direct bond, methylene, ethylene or a group ##STR3## and Y is C.sub.1 -C.sub.8 alkyl, R.sub.1 and R.sub.2 independently of one another are C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.5 -C.sub.7 cycloalkyl which is substituted by C.sub.1 -C.sub.4 alkyl, or are phenyl or C.sub.7 -C.sub.10 phenylalkyl, and R.sub.2 is additionally hydrogen, are suitable for stabilizing organic material against thermal, oxidative or actinic degradation.

REFERENCES:
patent: 3441575 (1969-04-01), Dexter et al.
patent: 3642868 (1972-02-01), Dexter et al.
patent: 4536593 (1985-08-01), Orban et al.
patent: 4594444 (1986-06-01), Orban
Derwent Abst. (87)105824/15.

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