Hoechst Celanese Corporation

David M Brown

Robert E Potvin

Cheryl A Littau

Narayan D Sadanani

Erich M Gatter

Mohammad A Khadim

Gerald Moskowitz

April Yeager

This invention relates to an improved process for preparing selected N-acyl-aminodiacids such as lauroyl glutamic acid.

Process for preparation of N-acyl-aminodiacids

A process for a high temperature, solvent free quaternization of certain tertiary amines using dimethylsulfate to produce quaternary ammonium methyl sulfates which may be used in fabric softening and other applications, is disclosed.

Solvent free quaternization of tertiary amines with dimethylsulfate

The method for forming an image which comprises

Method for forming an image from a high speed screen printing

The present invention relates to dyestuffs soluble in organic solvents having the structure: ##STR1## wherein R is CF.sub.3 or phenyl, R.sub.1 and R.sub.2 are the same or different substituent groups selected from the group consisting of hydrogen, hydroxy, halogen, C.sub.1 to C.sub.3 alkyl and C.sub.1 to C.sub.4 alkoxy, R.sub.3 is selected from the groups consisting of hydrogen, C.sub.1 to C.sub.3 alkyl, C.sub.1 to C.sub.3 alkoxy, COOH, and COOR.sub.5 wherein R.sub.5 is C.sub.1 to C.sub.4 alkyl, R.sub.6 is selected from the group consisting of hydrogen, sulfonyl, C.sub.1 to C.sub.3 alkyl, C.sub.1 to C.sub.3 alkoxy and halogen, and n is zero or a whole number ranging from 1 to 3. The dyestuffs of the invention are useful as light absorbers or antihalation agents in photosensitive compositions. They may also be used as dyeing agents for paper, fibers or films and as components in printing ink formulations.

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Charlotte, NC, United States of America

David M Brown