Color developer for pressure-sensitive copying paper

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

1982-01-25

1983-10-25

Schain, Howard E.

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, 525504, 525505, 525491, C08L 6106, C08L 6108, C08L 6112, C08L 6134

Patent

active

044120451

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: 3988386 (1976-10-01), Hesse et al.
patent: 4216300 (1980-08-01), Kikuga et al.

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