Mark forming record materials

Abstract

Abstract A CHROMOGENIC MATERIAL OF NORMALLY COLORLESS FORM IS DISCLOSED, HAVING A STRUCTURAL FORMULA: 3-(O=),6''-((R3)2-N-),2''-R1,3''-R,R2-SPIRO(PHTHALAN-1,9''- XANTHENE) WHEREIN ONE OF R1 AND R2 REPRESENTS A CHEMICAL RADICAL HAVING THE STRUCTURE 2-(R5-N-),3-Y-NAPHTHALENE OR A CHEMICAL RADICAL HAVING THE STRUCTURE 1-(R5-N-),2-Y,4-Z-BENZENE WHEREIN R5 REPRESENTS AN ALKYL RADICAL HAVING LESS THAN FIVE CARBON ATOMS OR HYDROGEN RADICALS, Z REPRESENTS NITRO-,AMINO DIALKYLAMINO-, ALKYL RADICALS HAVE LESS THAN FIVE CARBON ATOMS, OR HYDROGEN RADICALS, AND Y COMPRISES NITRO-, AMINO-, CARBOXYL, HYDROGEN AND ESTER RADICALS AND THE REMAINING OTHER R1 AND R2 COMPRISES AMINO-, NITRO-, HYDROGEN, ALKYL HAVING LESS THAN FIVE CARBON ATOMS ACETAMIDO ND HALOGEN RADICALS; R COMPRISES HYDROGEN RADICALS AND ALKYL RADICALS HAVING LESS THAN FIVE CARBON ATOMS; AND R3 COMPRISES ALKYL RADICALS HAVING LESS THAN FIVE CARBON ATOMS-SAID MATERIAL ASSUMING A COLORED FORM UPON REACTIVE CONTACT WITH A LEWIS ACID MOLECULE. EXAMPLES INCLUDE 2''-(2-CARBOXYANILINO)-6''-DIETHYLAMINOFLUORAN; 2''-(ANILINO-6''-DIETHYLAMINOFLUORAN; 2''-(3-CARBOMETHOXY -2-NAPATHYLAMINO)-6''-DIETHYLAMINOFLUORAN; 2''(2-CARBOMETHOXYANILINO)-6''DIETHYLAMINO-3''-METHYLFLUORAN; 2''-(3-CARBOXY-2-NAPHTHYLAMINO)-6''-DIETHYLAMINO-3''METHYLFLUORORAN; 6-(2-CARBOXYANILINO)-2''-CHLORO-6''-DIETHYLANINO-3''METHYLFLUORAN; 2''-(2-CARBOXY-4-NITROANILINO)-6''-DIETHYLAMINOFLUORAN; 6''-DIETHYLAMINO-2''-(N-METHYLANILINO)FLUORAN; AND 6''-DIETHYLAMINO-2''-(2,4-DINITROANILINO)FLUROAN.

Inventors

• 👤 C Lin

Bibliographic Details