Bayer Corporation

Sun Chemical Corporation

Daphne J Rice

Ibraheem T Badejo

Brian L Thompson

Wengan Wu

Tracie Tibbs

Michael J Greene

Thomas R Flatt

Richard Kent Faubion

Margot Campos

John F Britanak

Bobby Mims

Edward H Sung

John Britanak

Niran Nugara

2,5-di(p-methoxyanilino)terephthalic acid crystal types I and II are made by controlling the pH during the recovery of the oxidized product of the condensation of dimethylsuccinyl succinate with p-methoxyaniline. The resulting 2,5-di(p-methoxyanilino)-terephthalic acid can be converted into 2,9-dimethoxyquinacridone or a solid solution thereof having controlled characteristics.

2,5-di(methoxyanilino) terephthalic acid polymorphs and quinacridones realized therefrom

Novel crystal forms of solid solutions of 2,9-dimethyoxyquinacridone and 2,9-dichloroquinacridone. The crystal forms may be formed by a process comprising the steps of: a) heating a mixture of 2,5-di(4-methoxyanilino)terephthalic acid, and 2,5-di(4-chloroanilino)terephthalic acid in polyphorsphoric acid at a temperature less than 1050 C to form a mixture of 2,9-dimethoxyquinacridone and 2,9-dichloroquinacridone; b) combining the mixture of 2,9-dimethoxyquinacridone and 2,9-dichloroquinacridone with water; and c) heating the mixture of 2,9-dimethoxyquinacridone and 2,9-dichloroquinacridone at a temperature not more than 110&#xb0; C. Another crystal form may be formed by the process of heating a mixture of 2,9-dimethoxyquinacridone and 2,9-dichloroquinacridone in a polar aprotic solvent. These products are may be used for coloring fibers, plastics, paints, coatings, printing inks, color filters, cosmetics, automotive coatings, textiles, fibers, powder coatings, in-mold coatings, laminate films, and the like.

Crystal forms of quinacridones made from 2,9-dimethoxyquinacridone and 2,9-dichloroquinacridone

Preparation of quinacridone pigment compositions

This invention relates to pigment derivatives having the formula ##STR1## wherein Q represents an organic pigment moiety;

Pigment derivatives for waterborne coatings

This invention relates to a process for preparing pigment compositions by

Process for preparing organic pigment compositions

This invention relates to pigment compositions containing an organic pigment treated with a pigment derivative having the formula (I) ##STR1## wherein Q represents an organic pigment moiety; X is O, S, or N--R.sup.1 ; Y is N--R.sup.2, O, or a direct bond; Z is --CO--, --Alk--, --Ar--, or chemically reasonable combinations thereof; Alk is C.sub.1 -C.sub.5 alkylene, C.sub.2 -C.sub.5 alkenylene, or C.sub.4 -C.sub.5 alkadienylene, or substituted derivatives thereof; Ar is arylene; R.sup.1 is hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.7 -C.sub.16 aralkyl, or --CN; and R.sup.2 is hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.7 cycloalkyl, C.sub.7 -C.sub.16 aralkyl, or C.sub.6 -C.sub.10 aryl; with the provisos that (1) the cyclic moiety represented by the formula ##STR2## must be a four- to seven-membered ring, (2) Z can contain a C.dbd.O group adjacent to the nitrogen atom of the Q--CH.sub.2 --N moiety only if Y is N--R.sup.2 or O, and (3) X can be O only if Y is N--R.sup.2 or O.

Organic pigment compositions

This invention relates to a process for the preparation of quinacridone pigments by

Incorporation of quinacridone additives during quinacridone preparation

Incorporation of pigment derivatives in quinacridone processes

This invention relates to pigment compositions comprising an organic pigment treated with about 0.1 to about 20% by weight, based on the organic pigment, of an N-heteroarylamidomethyl pigment derivative having the formula (I) ##STR1## wherein, Q represents an organic pigment moiety, NHet represents a nitrogen-containing heteroaromatic group attached at a ring nitrogen atom to the carbonyl function of the amidomethyl linking group, and n is from 1 to 4.

This invention relates to pigment compositions comprising an organic pigment treated with about 0.1 to about 20% by weight, based on the organic pigment, of a compound having the formula (I) ##STR1## wherein Q represents an organic pigment moiety,

This invention relates to a process for the preparation of quinacridone pigments by (a) heating, at a temperature of about 80.degree. C. to about 145.degree. C., a reaction mixture containing

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Charleston, SC, United States of America

Daphne J Rice