Thermally stable anthrapyridone

Details Thermally stable anthrapyridone Thermally stable anthrapyridone

2005-12-22

2010-02-02

Aulakh, Charanjit S (Department: 1625)

Compositions: coating or plastic

Coating or plastic compositions

Natural resin or derivative containing

C524S089000, C546S076000

Reexamination Certificate

active

07655085

ABSTRACT:
An anthrapyridone composition of the formula:is disclosed, where “A” and “B” are independently selected from substituted or unsubstituted cyclic ketone groups having from about 10 to about 20 ring carbon atoms; “a” is an integer having a value from 0-4, R1-R4are monovalent substituents; with the proviso that when “a” is 0, R1is selected from the group consisting of a hydrogen, an alkyl group, a secondary amino group and an aminosulphonyl group; and R2-R4are substituents selected form the group consisting of a hydroxyl group, an aliphatic group, an aromatic group, a heterocyclic group, a halogen atom, a cyano group, a carbonyl containing group, an amino group and a sulphonyl-containing group. The anthrapyridones are useful as thermally stable colorants for producing colored polymer resins and articles that require high temperature polymer processing conditions.

REFERENCES:
patent: 7074265 (2006-07-01), Ikesu et al.

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