Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1985-11-08
1986-09-30
Kight, John
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524171, 568 33, 428341, 106 21, 346212, 282 275, B41M 516, B41M 522
Patent
active
046147578
ABSTRACT:
A chelate of zinc with 4,4'-dihydroxydiphenyl sulfone is obtained in a solvent-free system for use as a color developer in carbonless copy paper systems. The 4,4'-dihydroxydiphenyl sulfone is solubilized in an aqueous medium by reacting with a water-soluble amine. A mineral matrix is then added followed by the addition of a zinc halide, preferably zinc bromide, to cause the chelate of zinc with 4,4'-dihydroxydiphenyl sulfone onto and within the structure of the mineral matrix. After removal of any excess zinc cations, and addition of any desired fillers, a binder is added and the composition coated onto the substrate.
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Kight John
Moore M. L.
The Standard Register Company
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