Color developer for pressure-sensitive copying paper

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

1989-11-03

1991-09-17

Kight, III, John

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

Synthetic resins

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

528129, 528155, C08G 828, C08G 1404, C08L 6114, C08L 8500

Patent

active

050496298

ABSTRACT:
A color developer for pressure-sensitive copying paper is disclosed, containing a polyvalent metal-modification product of a p-substituted phenolformaldehyde condensate substantially terminated with an o-substituted phenol nucleus, with a content of a condensate component in which each of both terminal phenol nuclei thereof has a hydrogen atom at the o-position being not more than 20% by weight based on the total condensate. The color developer exhibits excellent color developability, undergoes no yellowing, and provides a color image having excellent water resistance.

REFERENCES:
patent: 4173684 (1979-11-01), Stolfo
patent: 4620874 (1986-11-01), Booth, Jr. et al.
patent: 4839457 (1989-06-01), Hayama et al.

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