Mixtures of dye precursors, and pressure-sensitive recording mat

Details Mixtures of dye precursors, and pressure-sensitive recording mat Mixtures of dye precursors, and pressure-sensitive recording mat

1986-02-27

1988-01-05

Yarbrough, Amelia Burgess

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

427150, 427151, C09D 1100

Patent

active

047174234

ABSTRACT:
Mixtures of dye precursors which contain (a) the lactone of 2-carboxy-4,4'-bisdimethylaminobenzhydrol (I) and (b) crystal violet lactone and/or one or more fluoran lactones of the formula ##STR1## where R.sup.1 is alkyl, R.sup.2 is alkyl, phenalkyl, unsubstituted or substituted phenyl or cycloalkyl, or ##STR2## is pyrrolidinyl, piperidinyl or morpholinyl, R.sup.3 is H or tert.-butyl, R.sup.4 is H or methyl, R.sup.5 is H, alkyl or phenalkyl and R.sup.6 is H, alkyl, phenalkyl, cycloalkyl or unsubstituted or substituted phenyl, or ##STR3## is pyrrolidinyl, piperidinyl or morpholinyl, possess improved lightfastness in pressure-sensitive recording systems.

REFERENCES:
patent: 3525630 (1970-08-01), Phillips
Chemical Abstract No. CA79(14):80343h, German Patent No. DE 2264033, Jul. 5, 1973.
Abrahart, "Stabilised leuco dyes as colour formers", Chemistry and Industry, Jun. 16, 1973, p. 583.
Kondo et al., "Phthalide color formers", Chemical Abstracts, vol. 84, No. 4, Jan. 1976, p. 116.
Miki et al., "Pressure-sensitive copying paper", Chemical Abstracts, vol. 80, No. 10, Mar. 11, 1974, p. 410.

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