EDWARD M JAFFE
Pharmacy in Wilmington, DE

5529623, Jun 25, 1996

Sep 28, 1994

8/314018

Shivakumar B. Hendi - Newark DE
James B. Ganci - Wilmington DE
Edward E. Jaffe - Wilmington DE

Ciba-Geigy Corporation - Tarrytown NY

C09B 4800

106495

Binary and ternary pigmentary solid solutions are disclosed. The binary solid solutions are binary solid compounds consisting of 35-45 weight-percent unsubstituted DPP and 55-65 weight-percent dichloro DPP. The ternary solid solutions are guest-host solid solutions wherein the binary solid compound is the host and up to 30 weight-percent of a disubstituted quinacridone pigment is the guest. The binary and ternary solid solutions are useful as pigments for coloring high-molecular-weight organic materials; especially as replacements for perylene pigments in automotive finishes.

4478968, Oct 23, 1984

Apr 6, 1983

6/482596

Edward E. Jaffe - Wilmington DE

Ciba-Geigy Corporation - Ardsley NY

C08K 534, C08K 556, C08J 320, C09C 310

524 88

A process for preparing a resin extended pigment from crude pigment is disclosed. The process involves dry premilling the crude pigment either with or without the resin followed by comilling the premilled pigment with the resin in the presence of water under alkaline conditions. Preferably an organic liquid which wets the resin and the pigment and can improve the crystallinity of the pigment is present in the water milling step.

5084573, Jan 28, 1992

Jul 13, 1990

7/552624

Fridolin Babler - Hockessin DE
Edward E. Jaffe - Wilmington DE

Ciba-Geigy Corporation - Ardsley NY

C09B 4800

546 56

2,9-Dichloroquinacridone in platelet form having a length of 1-45. mu. m, a width of 0. 1-20. mu. m and a thickness of 0. 05-5. mu. m; a process for the preparation thereof comprising conversion of the crude material in a polar solvent in the presence of a long chain thiol compound and a base; and the pigmentary use of said platelets.

5472496, Dec 5, 1995

Aug 11, 1994

8/289167

Shivakumar B. Hendi - Newark DE
Lindsay Kilmurry - Wilmington DE
Edward E. Jaffe - Wilmington DE

Ciba-Geigy Corporation - Tarrytown NY

C09B 6722

106495

The present invention relates to novel solid solutions which comprise a quinacridonequinone component, a pyrrolo[3,4-c]pyrrole component and a third component which is a 2-anilinoacridone, a 5,6,7,8-tetrahydro-2-anilinoacridone, 2-phenoxyacridone, a 5,6,7,8-tetrahydro-2-phenoxyacridone or a mixture thereof. The solid solutions are three component solid solutions which consist of the components identified above or are four component solid solutions which additionally contain a quinacridone component. Pigment compositions containing the disclosed solid solutions and a method of pigmenting high molecular weight organic material with the solid solutions are also disclosed.

4371642, Feb 1, 1983

Jul 7, 1981

6/281195

Edward E. Jaffe - Wilmington DE

E. I. Du Pont de Nemours and Company - Wilmington DE

C08K 556, C09B 4800, C09B 4704, C08K 534

524 88

A process is disclosed for preparing resin extended pigments containing from 10% to 75% and preferably 25% to 50% by weight, based on the amount of pigment and resin present. The crude pigment and resin are premilled dry, such as in a ball mill, in a manner equivalent to that used to prepare small particle size highly aggregated pigment. Following premilling the pigment and resin are milled in an organic liquid capable of ripening the pigment particles to pigmentary size or simply improving their crystallinity which organic liquid at 30. degree. C. , can dissolve no more than 5 g/l and preferably no more than 2 g/l of the resin.

5457203, Oct 10, 1995

Sep 15, 1993

8/122025

Shivakumar B. Hendi - Newark DE
Edward E. Jaffe - Wilmington DE

Ciba-Geigy Corporation - Ardlsey NY

C09B 4800

546 56

A general method for the direct preparation of pigmentary quinacridone solid solutions is disclosed. The disclosed process comprises oxidizing a mixture of dihydroquinacridones directly to a pigmentary quinacridone solid solution wherein the oxidation is carried out by heating a reaction mixture comprising the dihydroquinacridone mixture, an alkali metal hydroxide, a water miscible organic solvent, water and effective mounts of an oxidizing agent and a particle growth inhibitor. In addition, an analogous process useful for the direct pigmentary synthesis of. alpha. -quinacridone is disclosed. The pigments prepared by the disclosed processes do not require additional particle-size reducing after treatments in order to be useful as pigments.

5856508, Jan 5, 1999

Nov 16, 1993

8/153550

Edward E. Jaffe - Wilmington DE
Martin Tanner - Tentlingen, CH

Ciba Specialty Chemicals Corporation - Tarrytown NY

C07D23970

5483017

Fluorescent yellow pigments comprising 1,2,3,4-tetrachloro-11H-isoindolo-�2,1-a!-benzimidazol-11-one and various derivatives thereof; the use of said pigments in a variety of substrates such as alkyds, enamels, inks and the like; a process for the preparation thereof involving the condensation of the appropriate o-phenylenediamine and tetrachlorophthalic anhydride; and the aforementioned novel derivatives of said compound.

4455173, Jun 19, 1984

Apr 16, 1982

6/368321

Edward E. Jaffe - Wilmington DE

E. I. Du Pont De Nemours and Company - Wilmington DE

C09B 4800

106288Q

Pigmentary grade quinacridone pigments are prepared from crude quinacridone by conversion to aggregated low crystallinity quinacridones followed by milling the aggregated low crystallinity quinacridone in the presence of a liquid which wets the pigment and can improve the crystallinity of quinacridone at 10. degree. to 60. degree. C. Suitable quinacridones include ##STR1## and mixtures thereof with up to 15 wt. % of ##STR2## where R. sup. 1, R. sup. 2, R. sup. 3, R. sup. 4, R. sup. 5 R. sup. 6 are hydrogen, fluorine, chlorine, bromine, methyl or methoxy; R. sup. 7, R. sup. 9 and R. sup. 10 are hydrogen or chlorine; and R. sup. 8 is hydrogen, chlorine, bromine, nitro, alkyl groups of 1 to 5 carbon atoms, alkoxy groups of 1 or 2 carbon atoms or benzoylamino, and m is an integer of from 1 to 4.

5871827, Feb 16, 1999

Jun 18, 1997

8/877948

Edward Ephraim Jaffe - Wilmington DE
Franklin Roberts Hilfiker - Newark DE
Milton John Misogianes - Wilmington DE

Ciba Specialty Chemicals Corporation - Tarrytown NY

B44F 110, B44F 114, C09D 529, C09D 536

428 29

This application discloses two-coat and three-coat automotive finishes, articles coated by an automotive finish and a process for their preparation wherein polychromism is achieved in the finish by incorporating an opaque, light interference pigment into the topcoat or a midcoat. The invention further relates to a coating composition which contains an opaque interference pigment at a pigment to binder ratio of less than 7/100.

4857646, Aug 15, 1989

Aug 24, 1987

7/088751

Edward E. Jaffe - Wilmington DE

Ciba-Geigy Corporation - Ardsley NY

C09B 4800

546 49

A new beta quinacridone polytype having a magenta color and a distinct X-ray diffraction pattern, said new form preferably having an average particle size of about 0. 2-0. 8. mu. m and being prepared by various wet milling or reflux procedures in alcohol-base systems.