由于有机硅聚合物主链是—SI—O—SI一O一键，侧基是有机基，因此，兼有无机物和有机物的特性，耐高温性能优于大多数有机树脂。用于涂料的树脂的耐热性按下列顺序递减：纯硅树脂>有机树脂改性硅树脂>有机硅改性有机树脂>无苯乙烯的丙烯酸树脂／聚羧酸树脂>聚酯／异氰尿酸三缩水甘油酯>环氧／羧基的聚酯>丙烯酸／异氰酸酯>聚酯／异氰酸>环氧／酚醛>环氧／双氰胺>环氧／胺，所以硅树脂是耐热涂料主要的成膜物质。

在250℃ 下侧基为苯基时具有最好的耐热性。因此甲基苯基硅树脂是品种最多、产量最大的硅树脂系列产品。随着苯基含量的增加，硅树脂的耐热性提高。

纯硅树脂的耐高温性能优于有机树脂；对于硅树脂改性有机树脂，随着硅树脂含量的增加，其耐高温性能也大大提高；因此，硅树脂改性有机树脂或有机树脂改性硅树脂的耐高温涂料纷纷上市，大大增加了耐高温涂料的品种。Because the main chain of organosilicone polymerization is -- Si -- O -- Si O one bond, the side group is organic, therefore, both inorganic and organic properties, high temperature resistance is better than most organic resins.
The heat resistance of resins used in coatings decreases in the following order: pure silicone >
Organic resin modified silicone resin >
Silicone modified organic resin >
Styrene-free acrylic resin/polycarboxylic acid resin >;
Polyester/triglycidyl isocyanurate >
Epoxy/carboxyl polyester gt;
Acrylic acid/isocyanate >;
Polyester/isocyanate >;
Epoxy/phenolic >
Epoxy/dicyandiamide >;
Epoxy/amine, so silicone is the main film - forming material of heat-resistant coatings.
It has the best heat resistance when the side group is phenyl at 250℃.
Therefore, methyl phenyl silicone resin is the largest variety, the largest production of silicone resin series products.
With the increase of phenyl content, the heat resistance of silicone resin is improved.
The high temperature resistance of pure silicone resin is better than that of organic resin.
For silicone modified organic resin, with the increase of silicone content, its high temperature resistance is also greatly improved;
Therefore, silicone resin modified organic resin or organic resin modified silicone resin high temperature coating have been listed, greatly increased the variety of high temperature coating.