Preparation method of high-temperature-resistant polyimide modified PDMS (polydimethylsiloxane) silicone resin

• Main Authors: HU XUCAN, LIU JIACHENG, YAO BOLONG, LIU JING, CHEN KUN
• Format: Patent
• Language: Chinese; English
• Published: 26.04.2019
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

The invention discloses a preparation method of high-temperature-resistant polyimide modified PDMS (polydimethylsiloxane) silicone resin, and belongs to the field of functional coatings. A 4-arm amineterminated component A crosslinking agent is synthesized from hydroxypropyl terminated polydimethylsiloxanes, IPDI (isophorone diisocyanate), TMP (trimethylolpropane) and 1,3-propanediamin; componentB anhydride terminated linear polyamic acid is synthesized from terephthalic anhydride, p-phenylenediamine and benzophenonetetracarboxylic dianhydride. The components A and B are subjected to crosslinking reaction and thermal imidization reaction after being mixed, a compact network structure film is formed, and the coating has extremely high heat resistance and strength. 一种耐高温聚酰亚胺改性PDMS硅树脂的制备方法，属于功能涂料领域。本发明利用端羟丙基聚二甲基硅氧烷、异弗尔酮二异氰酸酯（IPDI）、三羟甲基丙烷(TMP)、1，3-丙二胺合成四臂氨基封端的甲组分交联剂；用均苯二酸酐、对苯二胺、二苯甲酮四酸二酐合成乙组分酸酐封端的线性聚酰胺酸；甲乙组分混合后在高温下发生交联反应和热亚胺化反应，形成致密网络结构成膜，该涂层具有极高的耐热性和强度。