Monoester compound of 2,2-alkylidene bis(4,6-di-substituted phen

Details Monoester compound of 2,2-alkylidene bis(4,6-di-substituted phen Monoester compound of 2,2-alkylidene bis(4,6-di-substituted phen

1981-11-04

1982-12-21

Hoke, V. P.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524291, 560 61, 560104, 560105, 560121, 560123, 560124, 560140, 560221, 546322, C08K 534, C07D 513, C07C 6714, C07C 6708, C07C 6992, C07C 6988, C07C 6978, C07C 6974, C07C 6928

Patent

active

043650325

ABSTRACT:
A monoester compound of a 2,2'-alkylidene bis(4,6-di-substituted phenol) useful as an antioxidant in synthetic polymers having good resistant to oxides of nitrogen fumes, represented by the formula (I), ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, each represents a C.sub.1-4 alkyl group, a C.sub.5-6 cycloalkyl group or a methyl-substituted C.sub.5-6 cycloalkyl group; and one of R.sub.3 and R.sub.4 represents a hydrogen atom and the other represents a hydrogen atom or a C.sub.1-10 alkyl group or both of them represent a methyl group; R.sub.5 represents a C.sub.4-9 alkyl group, a C.sub.3-7 cycloalkyl group, a C.sub.2-4 alkenyl group, a phenyl group, a C.sub.1-4 alkyl-substituted phenyl group, a C.sub.1-4 alkoxy-substituted phenyl group, a mono- or di- C.sub.1-4 alkyl-substituted hydroxyphenyl group, a styryl group, a benzyl group or a pyridyl group, and a method of preparing such a monoester compound.

REFERENCES:
patent: 3265661 (1966-08-01), Rocklin
patent: 3428711 (1969-02-01), Hunt
patent: 3579561 (1971-05-01), Meltsner
patent: 3642669 (1972-02-01), Nast
patent: 3795700 (1974-03-01), Song et al.
patent: 4107137 (1978-08-01), Proux et al.
patent: 4168387 (1979-09-01), Cottman
Die Angewandte Makromolekulare Chemie, 28, pp. 13-19, (1973).

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