| 摘要 |
PURPOSE:To form an image high in quality and to render it hardly erasable with a rubber eraser by using a binder consisting essentially of a resin obtained by polymerizing system contg. at least specified two kinds of monomers in the presence of a polymn. initiator in an aliphatic hydrocarbon solvent. CONSTITUTION:The optimum binder polymer can be formed by copolymerizing a monomer A of an unsatd. compd. of formula 1 solvatable before and after polymerization, with another monomer B of formula 2 capable of forming a cross- linking component, preferably, in an A/B monomer weight ratio of (50-99.5)/ (0.5-50) in an aliphatic hydrocarbon solvent in the presence of a polymn. initiator, such as benzoyl peroxide or azobisisobutyronitrile, by the one or two- stage heat cross-linking polymn. method. |
