Pressure sensitive recording sheets

Details Pressure sensitive recording sheets Pressure sensitive recording sheets

1979-07-18

1981-06-30

Hess, Bruce H.

Textiles: manufacturing

106 21, 427150, 428307, 428537, 428914, B41M 516, B41M 522

Patent

active

042759064

ABSTRACT:
Pressure sensitive recording sheets are prepared characterized by containing on one side thereof color former dissolved in a solvent which is one or a mixture of alkoxy diphenyl alkanes having the following structure: ##STR1## where R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are H or a straight or branched chain alkyl group of 1 to 8 carbon atoms and can be the same or different; R.sub.5 is a straight or branched chain alkyl group of 1 to 9 carbon atoms; R.sub.6 is a straight or branched chain alkyl group of 1 to 8 carbon atoms; x is 0, 1 or 2; y is 1 or 2 and n is 1 or 2, with the proviso that the sum of the carbon atoms in R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 does not exceed 9 and with the further proviso that where the alkoxy diphenyl alkane is a solid to viscous liquid, at least one diluent or at least one other generally liquid solvent or mixture thereof is present. The treated side of the sheet is brought into contact with a developer. Upon application of pressure, color is produced by reaction between the color former and the developer.

REFERENCES:
patent: 2710849 (1955-06-01), Siggel
patent: 3836383 (1974-09-01), Kiritani et al.
patent: 3936566 (1976-02-01), Sato et al.
patent: 3968320 (1976-07-01), Herber et al.
patent: 3996405 (1976-12-01), Porter
patent: 4130299 (1978-12-01), Wygant
patent: 4147830 (1979-04-01), Kato et al.
patent: 4159208 (1979-06-01), Hayashi et al.

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