Patent ID: 6527384
Filing Date: 2003-03-04
Classification: C09D

Abstract:
An ink composition comprising: a coloring agent,a color developer, at least one decolorization agent selected from the group consisting of N-methyl-Nâ€²-phenylacetylpiperazine, N-phenyl-Nâ€²-phenylacetylpiperazine, N-lauryl-Nâ€²-phenylacetylpiperazine, N-benzyl-Nâ€²-phenylacetylpiperazine, N-phenyl-Nâ€²-p-chlorobenzoylpiperazine, N-benzyl-Nâ€²-benzenesulfonylpiperazine, N-stearyl-Nâ€²-benzenesulfonylpiperazine, N-phenyl-Nâ€²-benzenesulfonylpiperazine, N,Nâ€²-bis(benzenesulfonyl)piperazine, N,Nâ€²-bis(p-chlorobenzenesulfonyl)piperazine, N-phenyl-Nâ€²-benzenesulfonylpiperazine, N-butyl-Nâ€²-p-methylbenzenesulfonylpiperazine, N-benzoylaminopropyl-Nâ€²-benzenesulfonylpiperazine, N-benzoylaminobutyl-Nâ€²-benzenesulfonylpiperazine, N-benzoylaminopropyl-Nâ€²-butanesulfonylpiperazine, N,Nâ€²-bis(butylsulfonyl)piperazine, N,Nâ€²-bis(laurylsulfonyl)piperazine, N,Nâ€²-bis(cyclohexylsulfonyl)piperazine, N-butylsulfonyl-Nâ€²-benzenesulfonylpiperazine, N-(o-chlorobenzenesulfonyl)-Nâ€²-benzenesulfonylpiperazine, N-(o-methylbenzoyl)-Nâ€²-benzenesulfonylpiperazine, N,Nâ€²-bis(hexyloyl)piperazine, N,Nâ€²-bis(cyclohexyloyl)piperazine, N,Nâ€²-bis(p-methylphenylacetyl)piperazine,N,Nâ€²-bis(phenylpropionyl)piperazine, N,Nâ€²-bis(benzoyl)piperazine, N,Nâ€²-bis(m-methylbenzoyl)piperazine, N,Nâ€²-bis(o-butyryloxybenzoyl)piperazine, N,N,Nâ€²,Nâ€²-tetrabutylsuccinic acid diamide, N,N,Nâ€²,Nâ€²-tetrastearylsuccinic acid diamide, N,N,Nâ€²,Nâ€²-tetraphenyladipic acid diamide, N,N,Nâ€²,Nâ€²-tetrabutyladipic acid diamide, N,N-dicyclohexyl-Nâ€²,Nâ€²-dimethylsuccinic acid diamide, N,Nâ€²-dicyclohexyl-N,Nâ€²-dimethylglutamic acid diamide, N,Nâ€²-dimethyl-N,Nâ€²-dicyclohexylsebacic acid diamide, N,Nâ€²-dimethyl-N,Nâ€²-dicyclohexylmalonic acid diamide, N,N,Nâ€²,Nâ€²-tetrabenzyladipic acid diamide, adipoyldipiperidone, succinyl-di-3-chloro-&egr;-caprolactam, N,Nâ€²-terephthaloylbispiperidine, N,Nâ€²-isophthaloylbispiperidine, N,Nâ€²-phthaloylbismorpholine, N,Nâ€²-isophthaloyl-4-phenylpiperazine, N,Nâ€²-phthaloylbiscaprolactam, N,Nâ€²-terephthaloylbis-dibutylamine, N,Nâ€²-isophthaloyl-dicyclohexylamine, N,Nâ€²-isophthaloylbis-dibenzoylaminoethylamine, N,N-terephthaloylbis(3-methylpiperidine), N,Nâ€²-phthaloylbis(4-benzylpiperazine), N,Nâ€²-isophthaloylbis(2-methoxycarbonylpiperidine), N,Nâ€²-terephthaloylbis(5-ethyl-2methylpiperidine), N,Nâ€²-bis(benzoylaminobutyl)piperazine, N-(p-chlorobenzoylaminoamyl)-Nâ€²-benzoylaminopropylpiperazine, N,Nâ€²,Nâ€³-tribenzoyl-diethylenetriamine, N,Nâ€²-isophthaloyldi(N-cyclohexyl-N-methylamide), ethylenediaminetetraacetic acid tetraanilide, and ethylenediaminetetraacetic acid tetracyclohexylamide, and a solvent in which said coloring agent, said color developer, and said decolorization agent are dissolved or dispersed, said ink composition being capable of being colored at 40Â° C. or less, with said coloring agent reacting with said color developer to form a chemically bonded structure, and also capable of being decolorized when heated to 100Â° C. or more, with said chemically bonded structure being ruptured to liberate said color developer therefrom, and said liberated color developer being chemically bonded to said decolorization agent.