Abstract Hyperbranched alkyds based on ditrimethylolpropane, dimethylolpropionic acid, and ricinoleic acid were synthesized. The synthesized resins were characterized by the determination of hydroxyl and acid numbers, viscosity, average molecular masses, and molecular masses distribution. Compared with conventional alkyd resins of similar molar masses, the synthesized hyperbranched alkyds have significantly lower viscosity values at a given temperature. Therefore, a significantly smaller amount of organic solvents is required for their dissolution and can be used as precursors to obtain eco-friendly coatings. The obtained hyperbranched alkyd resins were cured by two commercial melamine resins (mass ratio 70:30). The curing of the resin mixtures was examined by FTIR spectroscopy, rheometry, and by the determination of gel content. The curing of the resin mixtures proceeds via the reactions between hydroxyl and carboxyl groups of hyperbranched alkyds with isobutoxymethyl and methoxymethyl groups in melamine resins. Hyperbranched alkyd/melamine resin mixtures were cured at 150 °C for 60 min. Thermal properties, dynamic mechanical behavior, physico-mechanical characteristics, and chemical resistance of cured films were determined. The crosslinking densities of films obtained from mixtures using hexamethoxymethyl melamine resin are significantly higher than those based on mixtures using isobutylated melamine resin. The thermal degradation of cured films is a complex process, and their thermal stability increases slightly with the increase of hyperbranched alkyds generation. It is assumed that mixtures of synthesized hyperbranched alkyds with melamine resins would be suitable for obtaining the coatings with good chemical resistance and physical-mechanical properties.

中文翻译：

---

用于涂料的蓖麻油酸基超支化醇酸树脂的合成与表征

摘要 合成了以双三羟甲基丙烷、二羟甲基丙酸和蓖麻油酸为基础的超支化醇酸树脂。通过测定羟基和酸值、粘度、平均分子量和分子量分布来表征合成的树脂。与具有相似摩尔质量的常规醇酸树脂相比，合成的超支化醇酸树脂在给定温度下具有显着较低的粘度值。因此，溶解它们所需的有机溶剂量要少得多，并可用作获得环保涂料的前体。获得的超支化醇酸树脂通过两种商业三聚氰胺树脂（质量比 70:30）固化。树脂混合物的固化通过FTIR光谱法、流变测定法和凝胶含量的测定来检查。树脂混合物的固化通过超支化醇酸树脂的羟基和羧基与三聚氰胺树脂中的异丁氧基甲基和甲氧基甲基之间的反应进行。超支化醇酸/三聚氰胺树脂混合物在 150 °C 下固化 60 分钟。测定了固化膜的热性能、动态机械性能、物理机械特性和耐化学性。从使用六甲氧基甲基三聚氰胺树脂的混合物获得的薄膜的交联密度明显高于使用异丁基化三聚氰胺树脂的混合物获得的薄膜的交联密度。固化膜的热降解是一个复杂的过程，其热稳定性随着超支化醇酸树脂生成量的增加而略有增加。