Prevention of spotting in thermal imaging compositions

Details Prevention of spotting in thermal imaging compositions Prevention of spotting in thermal imaging compositions

1985-10-16

1990-04-17

Yarbrough, Amelia Burgess

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

427150, 427151, 503216, 503217, 503219, 503225, 503226, C09D 1100

Patent

active

049177303

ABSTRACT:
Thermally imageable composition comprising (a) at least one leuco dye, (b) a nitrate salt, (c) at least one base having a conjugate acid having pKa equal to or greater than zero. The base serves to prevent spotting or backgrounding of transparency films bearing said thermally imageable composition during the manufacturing process used in preparing the films.

REFERENCES:
patent: 3865593 (1975-02-01), Yoshida
patent: 3986880 (1976-10-01), Wainer et al.
patent: 4066459 (1978-01-01), Bachman et al.
patent: 4247618 (1981-01-01), Dessauer et al.
patent: 4291102 (1981-09-01), Tsukahara
patent: 4348234 (1982-09-01), Cespon
patent: 4379835 (1983-04-01), Lowrey et al.
patent: 4422671 (1983-12-01), Cespon
patent: 4423139 (1983-12-01), Isbrandt et al.
patent: 4460677 (1984-07-01), Smith et al.
Chemical Abstracts, 132168p, vol. 82, 1975.

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