A method of producing fluorescent pigment having a high resistance to organic solvents
The article describes a method for the preparation of thermoplastic fluorescent pigments and studied various compounds produced by this method pigments. The authors developed methods for several types of fluorescent pigments of different chemical structure was obtained. The effect of p -toluenesulfonamide as a hardener, on the quality of the pigments. It is found that increasing the amount of p -toluenesulfonamide reduces the melting temperature of the thermoplastic pigments. Resistance derived pigments to organic solvents was studied by their leaching from the polymer mass of the carrier. It has been established that the greatest resistance to organic solvents have pigments, in the preparation of which equimolar amounts of amines were used as hardeners. The main advantages obtained pigments are high melting point, resistance to organic solvents and low polydispersity of the particle sizes in the range of 3.0-4.8 microns.