Color-developer for pressure-sensitive recording sheets

Details Color-developer for pressure-sensitive recording sheets Color-developer for pressure-sensitive recording sheets

1981-03-24

1983-08-23

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, 525480, 525481, 528137, 528139, 528143, 528144, 528150, 528153, 528155, 528161, C08G 812, C08G 820, C08G 824, C08G 828

Patent

active

044004923

ABSTRACT:
Disclosed is a color-developer for pressure-sensitive recording sheets, comprising a co-condensate of a reaction intermediate of a p-substituted phenol and a trifunctional or higher phenol, or a polyvalent metal salt of said co-condensate, said reaction intermediate being obtained by the reaction of said p-substituted phenol under acidic conditions with formaldehyde or a substance capable of generating formaldehyde.

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