Pressure sensitive copying paper

Details Pressure sensitive copying paper Pressure sensitive copying paper

1982-07-08

1984-07-24

Hess, Bruce H.

Recorders

Record receiver deforming

346212, 346216, 346225, B41M 516

Patent

active

044614950

ABSTRACT:
A condensate free from stickiness and exhibiting an excellent initial color-formability when used as color developer of pressure sensitive copying paper can be obtained by reacting p-hydroxybenzoic acid and one p-alkyl-substituted phenol or a mixture of two or more p-alkyl-substituted phenols with formaldehyde in the presence of an acid catalyst and then directly taking out the condensate into cold water without any procedure such as dehydration, concentration, etc.

REFERENCES:
patent: 4226962 (1980-10-01), Stolfo
patent: 4262936 (1981-04-01), Miyamoto
patent: 4263047 (1981-04-01), Miyamoto et al.

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