Method of making dibenzoylresorcinol compositions capable of abs

Details Method of making dibenzoylresorcinol compositions capable of abs Method of making dibenzoylresorcinol compositions capable of abs

1997-11-04

1999-05-18

Gupta, Yogendra N.

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

Organic compounds

Oxygen containing

568332, C07C49/786

Patent

active

059051728

ABSTRACT:
Novel dibenzoylresorcinol compositions capable of absorbing ultraviolet light having the formula ##STR1## where Ar.sub.1 and Ar.sub.2 are independently substituted or unsubstituted monocyclic or polycyclic aryl groups, R is hydrogen, an aryl group, or a linear or branched alkyl chain having less than about 10 carbons, and Ar.sub.3 is an aryl group bearing at least one hydroxyl group. Methods of making the compositions are provided. The novel dibenzoylresorcinol compositions are methylene-bridged dibenzoylresorcinol derivatives having a phenol group on the bridging methylene and are compatible in coating compositions to improve the weatherability of thermoplastic substrates.

REFERENCES:
Chemical Abstracts, vol. 77, 1972, p. 28, 62720h by M. Karvas et al.
"Heterocycles", Vo. 105, 1986, p. 649, 78941p, N. Kubota et al.
"Noncondensed Aromatics", vol. 91, 1979, p. 617, M. Minagawa et al.
CA 103: 123103, 1984.

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