Abstract WHEREIN R1 and R2 each represents a member selected from the group consisting of an alkyl group having from one to five carbon atoms and a benzyl group; X represents a member selected from the group consisting of an alkyl group having from one to five carbon atoms and an aryl group, and Y represents a member selected from the group consisting of an alkyl group having from one to 17 carbon atoms, an aryl group, an amino group, an acylamino group and an alkoxy group having from one to five carbon atoms. A pressure-sensitive copying paper comprising a support having coated thereon microcapsules containing an organic solvent solution of a compound which, when in contact with an electron acceptable solid acid, forms a color dye and is represented by the following formula:
The pressure-sensitive copying paper as in claim 1 wherein said organic solvent is a member selected from the grOup consisting of chlorinated diphenyl, chlorobenzene and ethyleneglycol.
Claim 2
Dependent Claim
40 words
The pressure-sensitive copying paper as claimed in claim 1 wherein said electron-acceptable soil acid is a member selected from the group consisting of an acid clay, an active clay, attapulgite, zeolite, bentonite, succinic acid, tannic acid, gallic acid and pentachlorophenol.
Claim 3
Dependent Claim
45 words
A pressure-sensitive copying paper comprising a support having coated thereon an electron-acceptable solid acid and microcapsules containing an organic solvent solution of a compound which is in contact with said electron-acceptable solid acid to from a color dye and is represented by the following formula:
Claim 4
Dependent Claim
52 words
A pressure-sensitive copying paper comprising and under paper having coated thereon an electron-acceptable solid acid and an upper paper having coated thereon microcapsules containing an organic solvent solution of a compound which is in contact with said electron-acceptable solid acid to form a color dye and is represented by the following formula: