1 results about "Disperse yellow" patented technology

This invention discloses a class of quinalidine disperse yellow dyes with high sublimation fastness and their synthesis method, belonging to the field of disperse dye technology. This invention uses Disperse Yellow 54 as the parent core and introduces one of the following substituents at the 6-position of the quinalidine ring: ethyl, n-propyl, cyclopropyl, cyclobutyl, cyclopropylmethyl, methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, cyclopropoxy, cyclobutoxy, cyclopropylmethoxy, 2-methoxyethoxy, fluorine, chlorine, bromine, cyano, or nitro. This invention uses 6-substituted-2-methyl-3-hydroxyquinoline-4-carboxylic acid and phthalic anhydride as raw materials, and synthesizes the target dye in one step via a high-temperature condensation reaction. Experimental results show that the sublimation fastness of the dye of this invention reaches grade 4-5 or 5, significantly improved compared to Disperse Yellow 54 (grade 2-3), while maintaining excellent resistance to rubbing, perspiration, and sunlight. This invention has a simple synthesis process, high yield, and high purity, possessing extremely high industrial production value and market application prospects.