Sensitized record sheet

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1980-10-24

1982-07-06

Smith, John D.

Textiles: manufacturing

427150, 427151, 427261, 428195, 428211, 4283044, 4283202, 428331, 428341, 428342, 428537, 428914, B41M 522

Patent

active

043379680

ABSTRACT:
A very thin film of acidic color developing material which reacts with a dye precursor to form a color upon contact therewith is obtained in a substantially spongy capillary-like film firmly adhered to the paper substrate without diffusing thereinto in accordance with the present invention. The film contains a phenolic resin, and amorphous lipohilic silica, preferably pyrogenic hydrophobic silica, and a fatty alcohol, preferably cetyl alcohol. The composition further preferably includes a non-volatile solvent. This composition not only provides excellent color-forming ability with a very thin film which adheres firmly to the paper, but may be applied to the paper with a standard printing press.

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patent: 4147830 (1979-04-01), Kato et al.
patent: 4154462 (1979-05-01), Golden et al.
Schue; G. R., "Functions and Parometers of Fumed Silica in Paint Systems", American Paint Journal, 7/8/68.
Bode; R. et al., "Basis and Applications of a Silica Produced by Flame-Hydrolysis", Paint, Oil and Color Journal, Sep. 6, 1968, pp. 1-7.
"Sunthene Series", from catalog of Sun Petroleum Products Co., P. O. Box 7430, Phila., Pa., 19101 (undated).

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