Positive-acting thermographic materials

Details Positive-acting thermographic materials Positive-acting thermographic materials

1987-10-15

1989-05-09

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Heavy metal reactant

427150, 428704, 428913, 503200, 503217, 503226, B41M 518

Patent

active

048290467

ABSTRACT:
A positive-acting thermographic material which is black or dark colored in the unexposed condition turns white or light colored when exposed to elevated temperatures. The material comprises a binder, a dark colored complex of ferric iron with a ligand chosen from organothiophosphorus acids, and a white organophosphorus acid or its alkali or alkaline earth metal salt. At elevated temperatures a double decomposition reaction occurs giving the light colored complex of ferric iron with the organophosphorus acid.

REFERENCES:
patent: 2663654 (1953-12-01), Miller et al.
patent: 3094620 (1963-06-01), Reitter
patent: 3111423 (1963-11-01), Ostlie
patent: 3293055 (1966-12-01), Baum
patent: 3483143 (1969-12-01), King et al.
patent: 3829401 (1974-08-01), Futaki et al.
patent: 3846153 (1974-11-01), Futaki et al.
patent: 3953659 (1976-04-01), Truitt
patent: 4049612 (1977-09-01), Sandler
patent: 4531141 (1985-07-01), Sagawa
patent: 4533930 (1985-08-01), Shioi et al.
patent: 4602264 (1986-07-01), Shioi et al.
patent: 4704379 (1987-11-01), Shioi et al.
J. Inorg. Nucl Chem. 1968, vol. 30, pp. 1553-1561, "The Infra-Red Spectra of Complexes of Beryllium with Tri-n-octylphosphine Oxide and Di(2-ethylhexyl) Phosphoric Acid", L. E. Smythe, T. L. Whateley and R. L. Werner.
Chemistry and Industry Jul. 2, 1955, "The Hydrolysis of Organic Phosphates", pp. 760-763, P. W. C. Barnard, B.Sc., C. A. Bunton, Ph.D., D. R. Llewellyn, Ph.D., K. G. Oldham, B.Sc., B. L. Silver, B.Sc., and C. A. Vernon, B.Sc.
Inorganic Chemistry, vol. 8, No. 9, Sep. 1969, "Electronic Equilibrium Between the A.sub.1 and T.sub.2 States in Iron(III) Dithio Chelates", pp. 1837-1846, A. H. Ewald, R. L. Martin, E. Sinn and A. H. White.
J. Am. Chem. Soc. 1985, 107, 4094-4095, "High Dilution Synthesis of Macrocyclic Polycatecholates", Steven J. Rodgers, Chiu Yuen Ng and Kenneth N. Raymond.
J. Am. Chem. Soc. 1958, 74, 2995-2997, "Unsymmetrical Dialkylphosphinic Acids", P. C. Crofts and I. S. Fox.
J. Am. Chem. Soc. 1934, pp. 1678-1681, "The Condensation of Catechol with Acetone", Wilson Baker.
Journal of Chemical Education, vol. 45, pp. 581-587, Sep. 1968, "Hard and Soft Acids and Bases", HSAB, Part 1, Fundamental Principles, Ralph G. Pearson.

Affiliated with

Also associated with

Rating

Positive-acting thermographic materials does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Positive-acting thermographic materials, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Positive-acting thermographic materials will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-90204