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US 4,070,303 AGranted
Solvent for dye used in pressure-sensitive copying paper
AssigneeKureha Kagaku Kogyo Kabushiki Kaisha
InventorsKimio Ohkubo, Mikio Fujioka
Life of this patent
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Abstract
Disclosed is a composition used as a solvent for dye used in pressure-sensitive copying paper containing an aromatic solvent and an aliphatic di-ester of the formula ROOC (CH.sub.2) COOR wherein R is methyl or ethyl and n is 2-4.
Claims6
A solvent for dye used in pressure-sensitive copying paper, comprising (a) an aromatic hydrocarbon selected from the group consisting of alkyl naphthalenes, alkyl biphenyls, triaryl dimethanes, diaryl ethanes and hydrogenated terphenyls and mixtures thereof and (b) an aliphatic acid di-ester of the formula
- ROOC--CH.sub.2n --COOR
- Wherein R is methyl or ethyl and n is an integer from 2 to 4, said di-ester being present in an amount of 0.5 to 10 parts by weight per 100 parts by weight of said aromatic hydrocarbon.
Dependencies are inferred from the claim text.