| 摘要 |
A process is disclosed for producing novel fluorescent pigment compositions with no formaldehyde or para-formaldehyde during their synthesis. The synthesis of these compositions is, for example, achieved by using an in situ reaction of epoxy resins of preferably up to a molecular weight of 20,000 with a sulfonamide compound, e.g., toluene sulfonamide, in the presence of a Lewis acid catalyst, followed by, preferably, the further reaction with an isocyanate, e.g., aliphatic isocyanate and/or para-toluene sulfonyl isocyanate. During this reaction, a fluorescent dye is incorporated into the molten mass. |
