Color developer for pressure-sensitive copying paper

Details Color developer for pressure-sensitive copying paper Color developer for pressure-sensitive copying paper

1977-11-01

1980-08-05

Ziegler, J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

282 275, 525500, 525501, 525504, 525505, 525506, C08L 6106

Patent

active

042163005

ABSTRACT:
A color developer for pressure-sensitive copying papers is prepared by mixing a para-substituted difunctional phenol-aldehyde condensate and tri- or higher-functional phenol-aldehyde condensate. The tri- or higher-functional phenol-aldehyde condensate can be modified by a polyvalent metal.

REFERENCES:
patent: 3938386 (1976-10-01), Hesse et al.

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