Sun Chemical Corporation

Bayer Corporation

Miles Inc.

Brian L Thompson

Charles W Sandefur

Wengan Wu

Daphne J Rice

Richard Kent Faubion

Tracie Tibbs

Thomas R Flatt

Charles E Shannon

John Britanak

Bobby Mims

Gregory R Schulz

Michael J Greene

Edward H Sung

James J Good

Abdul Sattar

Mark Ortalano

Darleen Rae Wright

Michael D Hayden

Bethany J Wolf

Ed Sung

William Burgess

Daphne Rice

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

Disclosed is a composition and process of manufacture of a stir-in form of pigment with increased dispersing and color properties. Pigment is slurried with acetylenic dispersing agents, wet-milled to a particular particle size, and then dried to powder or granulate form. Also disclosed is a process for producing a pigmented paint composition from the stir-in pigment.

Stir-in form of pigment

Crude indanthrone is milled, with or without other additives, to reduce and normalize particle size and distribution to a sub-pigmentary, near amorphous, state. The resulting highly aggregated crude powder is then treated with a heterogeneous solvent system of water and an alkyl ester of an aromatic carboxylic acid, such as methyl benzoate, to de-aggregate and grow the particles back to a pigmentary size. The conditions of the solvent treatment can be controlled with respect to temperature, time, and solvent ratio such that the desired properties of strength, shade, and dispersability are optimized.

Conditioning method for indanthrone pigments

Phthalocyanine pigments having 0-4 chlorine atoms have a narrow particle-size range with 90% of particles between about 0.01-0.10 &#x3bc;m, the average particle size of no more than about 0.5 &#x3bc;m, a D99 of no more than about 0.3 &#x3bc;m, and a polydispersity of about 2.0 or less. Pigment compositions contain the phthalocyanine pigment and water-based dispersing resin. The pigments and the compositions are compatible with waterborne coating systems, exhibit an excellent metallic down travel, and are especially useful for the automotive painting applications.

Phthalocyanine pigments with neutral metallic down flop

Process for the preparation of perylene pigments

This invention relates to a process for preparing pigment compositions by conditioning an organic pigment, at about 50 to about 200.degree. C., with

Method for conditioning organic pigments

This invention relates to a process for preparing trimethine dyestuffs of the formula ##STR1## wherein R.sup.1 is lower alkyl; R.sup.2 is hydrogen, alkyl, cycloalkyl, aryl, aralkyl, alkoxy, cycloalkoxy, aryloxy, aralkoxy, fluorinated alkyl, alkanoyl, aroyl, alkoxycarbonyl, aryloxycarbonyl, aralkoxycarbonyl, alkanoylamino, aroylamino, alkylaminocarbonyl, arylaminocarbonyl, alkoxycarbonylamino, alkylsulfonyl, arylsulfonyl, halogen, cyano, nitro, carbamoyl, or sulfonamido, or two R.sup.2 together form a fused benzene ring; n is an integer of from 1 to 4; and A.sup.- is an anion, by reacting a mixture of

Process for the preparation of trimethine dyestuffs

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Goose Creek, SC, United States of America

Brian L Thompson