Herman H Gerson

40641295, Dec 20, 1977

Sep 17, 1976

5/724150

Herman Gerson - New York NY
John Francis Santimauro - Wyckoff NJ
Lawrence Robert Lerner - Livingston NJ

Harmon Colors Corporation - Haledon NJ

C09B 4800

260279QA

A process is described for making quinarcridone and its derivatives, useful as organic pigments, wherein a 2,5-diarylaminoterephthalic acid and an acid catalyst are heated in a two phase liquid system, comprising ethylene glycol and an organic liquid which is immiscible with water and ethylene glycol, wherein the ethylene glycol is present in an amount of about 0. 25 to 4 parts by weight per part of 2,5-diarylaminoterephthalic acid and the organic liquid is present in an amount of at least about 2 parts by weight per part of ethylene glycol, at a temperature sufficient to remove by-product water from the liquid system by vaporization.

55340555, Jul 9, 1996

Aug 24, 1994

8/295342

Herman Gerson - New York NY
Abdul Sattar - Mt. Pleasant SC

Bayer Corporation - Pittsburgh PA

C09B 6750

106413

This invention relates to a process for preparing alpha-phase metal phthalocyanine pigments from crude metal phthalocyanine pigments comprising (a) acid pasting or acid swelling a crude metal phthalocyanine pigment; (b) dry milling the acid-pasted or acid-swelled metal phthalocyanine pigment in the presence of 5 to 50 parts by weight of a stabilizer per 100 parts by weight of the crude metal phthalocyanine pigment until the average particle size is reduced to less than about 0. 5. mu. m; (c) finishing the milled metal phthalocyanine pigment by thoroughly mixing said milled metal phthalocyanine pigment with a finishing solvent mixture comprising 3 to 6 parts by weight, relative to the crude metal phthalocyanine pigment, of water and 0. 4 to 1. 0 parts by weight, relative to the crude metal phthalocyanine pigment, of an organic solvent, optionally in the presence of 0 to 45 parts by weight of a stabilizer per 100 parts by weight of the crude metal phthalocyanine pigment, with the proviso that the total amount of stabilizer used in steps (b) and (c) ranges from 5 to 50 parts by weight per 100 parts by weight of the crude metal phthalocyanine pigment; and (d) isolating the alpha-phase metal phthalocyanine pigment.

53933397, Feb 28, 1995

May 11, 1994

8/241090

Herman Gerson - New York NY
Abdul Sattar - Mt. Pleasant SC

Miles Inc. - Pittsburgh PA

C09B 6750

106410

This invention relates to an improved process for preparing metal phthalocyanine pigments comprising (a) heating at a temperature of about 150. degree. C. to about 200. degree. C. a mixture comprising (i) a phthalocyanine-forming material based on phthalic acid, (ii) at least about 25 mole percent, relative to the phthalocyanine-forming material (i), of a metal donor, (iii) at least about 100 mole percent, relative to the phthalocyanine-forming material (i), of a nitrogen donor, (iv) 1 to about 20 percent by weight, relative to the phthalocyanine-forming material (i), of a catalyst, and (v) about 250 to about 400 percent by weight, relative to the phthalocyanine-forming material (i), of a di(C. sub. 1 -C. sub. 3 alkyl) phthalate solvent; and (b) isolating the metal phthalocyanine pigment.

57282048, Mar 17, 1998

Jan 31, 1996

8/594197

Abdul Sattar - Mt. Pleasant SC
Michael J. Greene - Charleston SC
Herman Gerson - New York NY

Bayer Corporation - Pittsburgh PA

C09B 6750

106411

This invention relates to water-dispersible phthalocyanine pigment formulations that are mixtures of (a) about 60 to about 99. 5% by weight, based on the total amount of components (a) and (b), of a conditioned metal phthalocyanine pigment, and (b) about 0. 5 to about 40% by weight, based on the total amount of components (a) and (b), of a water-insoluble sulfonated phthalocyanine having the formula Pc(SO. sub. 2 OR). sub. x (I) wherein Pc represents a phthalocyanine moiety; R is H or M, wherein M is a monovalent metal, divalent metal, trivalent metal, or ammonium cation, and x is a from about 0. 2 to about 4.

52483363, Sep 28, 1993

Nov 5, 1991

7/787852

Herman Gerson - New York NY
Abdul Sattar - Mt. Pleasant SC

Miles Inc. - Pittsburgh PA

C09B 6750

106411

This invention relates to solid solutions containing (a) about 90 to about 10% by weight of a chlorinated copper phthalocyanine containing about 14 to about 16 atoms of chlorine per molecule and (b) about 10 to about 90% by weight of a copper phthalocyanine containing about 3 to about 4 atoms of chlorine wherein said compositions are characterized by X-ray diffraction patterns that differ from the sum of the X-ray diffraction patterns of the individual components.