Patent ID: 7674748
Filing Date: 2010-03-09
Classification: B41M

Abstract:
1. A 4-hydroxy-4′-isopropoxydiphenylsulfone developer dispersion obtainable by wet grinding a 4-hydroxy-4′-isopropoxydiphenylsulfone developer in the presence of a hydration inhibitor, the hydration inhibitor being: (i-1) 1,1,3-tris(2-methyl-4-hydroxy-5-cyclohexylphenyl)butane, (i-2) 1,1,3-tris(2-methyl-4-hydroxy-5-cyclohexylphenyl)butane and 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl)butane, or (ii) 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanuric acid, the proportion of the hydration inhibitor being 0.02 to 25 parts by mass per 100 parts by mass of the developer.