NOVEL METHOD OF PRODUCING PAINT BINDER BASED ON ALKYD RESIN Russian patent published in 2024 - IPC C08G63/49 C08F2/06 C08F2/14 C09D11/105 

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of producing paint binders based on alkyd resins. Disclosed is a method of producing a paint-and-lacquer binder based on an alkyd resin, comprising the following steps: a) a step for loading fatty acids of linseed oil in amount of 58–68 wt.% into a reactor; polyol in amount of 12 to 15 wt.%; rosin in amount of 18 to 23 wt.%; dibasic acid in amount of 10 to 15 wt.% in percentage ratios of components per total reaction mass; b) heating the reaction mass formed at step a); c) mixing the reaction mass with simultaneous nitrogen purging; d) heating the reaction mass to temperature of 165–170 °C; e) holding the reaction mass at temperature of 165–170 °C about two hours; f) increasing the reaction temperature to 185–195 °C and holding when said temperature is reached for about one and a half hours; g) increasing the temperature of the reaction mass to 215–220 °C and holding at this temperature for about two and a half hours to obtain an alkyd resin consisting of components loaded at step a); h) adding to the synthesized alkyd resin after cooling the synthesized alkyd resin to room temperature as components of rosin, fusible wax, anionic surfactant and solvent; i) heating the reaction mass formed at step h) from the synthesized alkyd resin and the components added thereto; j) mixing the reaction mass with simultaneous nitrogen purging; k) heating the reaction mass formed at step h) to temperature of 150–155 °C; l) holding the reaction mass at temperature of 150–155 °C about 60 minutes to obtaining a homogeneous mass to obtain a paint-and-lacquer binder based on an alkyd resin, consisting of: synthesized alkyd resin in amount of 66–73 wt.%; rosin in amount of 17 to 20 wt.%; fusible wax in amount of 3 to 6 wt.%; anionic surfactant in amount of 1 to 3 wt.%; and a solvent in amount of 2 to 7 wt.%, wherein the percentage ratios of the components in the obtained alkyd resin-based paint binder are indicated by the total weight of the paint binder, while heating the reaction mass to temperature of 150–155 °C at step k) and while holding the reaction mass at this temperature for about 60 minutes at step l), and at the stages of heating the reaction mass to temperature of 165–170 °C step d) and higher at steps f) and g), as well as during maintenance of the reaction mass in all temperature conditions at steps e), f), g) and l), the reaction mass is simultaneously mixed and purged with nitrogen.

EFFECT: proposed binder is characterized by simplicity of implementation from hardware and technological points of view, availability and stability of initial reagents, prevention of losses of reagents of reaction mass at all stages of technological process, and also allows to obtain ink for printing by metallography method, having good printing properties, resistance to various media, to abrasion, legibility and structure of image printing.

7 cl, 2 ex