Solvent for the chromogenic dye-precursor material for a pressur

Details Solvent for the chromogenic dye-precursor material for a pressur Solvent for the chromogenic dye-precursor material for a pressur

1987-07-21

1988-09-27

Hess, Bruce H.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

427150, 42840221, 503213, 503215, B32B 916, B41M 516, B41M 522

Patent

active

047741368

ABSTRACT:
Disclosed herein are a solvent for a chromogenic dye-precursor material for a pressure-sensitive recording paper sheet, comprising (1) 30 to 80% by weight of p-monoisopropylbiphenyl or a biphenyl mixture of not less than 80% by weight of p-monoisopropylbiphenyl, not more than 20% by weight of m-monoisopropylbiphenyl and not more than 10% by weight of diisopropylbiphenyl, and (2) 70 to 20% by weight of diisopropylnaphthalene or a naphthalene mixture of not less than 97% by weight of diisopropylnaphthalene, not more than 1% by weight of monoisopropylnaphthalene and not more than 2% by weight of triisopropylnaphthalene, and a pressure-sensitive recording paper sheet prepared by using the solvent.

REFERENCES:
patent: 3627581 (1971-12-01), Phillips, Jr.
patent: 3979324 (1976-09-01), Herber
patent: 4054937 (1977-10-01), Mandelcorn et al.
patent: 4440846 (1984-04-01), Sanders et al.
"Alkalation of Biphenyl Under Mild Friedel-Crafts Conditions", by D. B. Priddy, IEC., Product Research and Development, vol. 8, No. 3, 239-241 (1969).

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