Decorative coatings based on coloured epoxy oligomers

Colored synthetic resins obtained by grinding resin and pigments (dyes) in ball mills have low light resistance and are characterized by migration of pigment to the surface. To obtain them, a large amount of pigment (dye) is required. Much better performance is typical for structurally colored resins in which the dye or pigment is chemically bonded to the polymer macromolecule. In this paper, the possibility of obtaining colored decorative paints based on structurally colored binders, which were obtained by joint polycondensation of diphenylolpropane, epichlorohydrin and small amounts (0.1–0.5% by weight) of glycidyl esters of 1-aminoanthraquinone (GEAA) or diglycidyl ether of 1.5-diaminoanthraquinone (DGEAA), is considered.

Glycidyl esters of aminoanthraquinone (GEAA and DGEAA) were synthesized by the N-alkylation of 1-aminoanthraquinone or 1.5-diaminoanthraquinone with epichlorohydrin.

The resulting structurally colored oligomers are viscous liquids with a molecular weight from 400 to 700 (cryoscopy in benzene), colored from orange to red.

Structurally colored epoxy oligomers are characterized by intense coloring, high light resistance while maintaining good mechanical properties.

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