METHOD FOR PRODUCING MALEIMIDE RESIN

• Main Authors: IMAI TETSUYA, SATO KITARU
• Format: Patent
• Language: English; Japanese
• Published: 30.05.2023
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

To provide a method for producing a maleimide resin, which can reduce a residual amount of solvent, enables synthesis in a short time, and can suppress side reactions during synthesis.SOLUTION: There is provided, a method for producing a maleimide resin obtained by reacting a tetracarboxylic acid dianhydride (a1), a diamine (a2), and maleic anhydride (a3), comprising: a half-esterification step of mixing a (a1) component and a mixed solvent to half-esterify the (a1) component; an imidization step of adding a (a2) component to the half-esterified (a1) component to perform a dehydration cyclization reaction to obtain a polyimide resin; and a maleimidization step of adding a (a3) component to the polyimide resin to perform a dehydration cyclization reaction to obtain a maleimide resin, where the mixed solvent comprises an aromatic hydrocarbon having a boiling point of 150°C or higher and an alcohol having a boiling point of 100°C or lower and the (a2) component comprises a dimer diamine and a second diamine other than the dimer diamine.SELECTED DRAWING: None 【課題】溶媒の残留量を低減でき、短時間で合成が可能であり、合成時の副反応を抑制可能なマレイミド樹脂の製造方法の提供。【解決手段】テトラカルボン酸二無水物（ａ１）、ジアミン（ａ２）、及び無水マレイン酸（ａ３）を反応させてなるマレイミド樹脂の製造方法であって、（ａ１）成分と混合溶媒とを混合して（ａ１）成分をハーフエステル化するハーフエステル化工程と、ハーフエステル化した（ａ１）成分に（ａ２）成分を添加して脱水閉環反応を行い、ポリイミド樹脂を得るイミド化工程と、ポリイミド樹脂に（ａ３）成分を添加して脱水閉環反応を行い、マレイミド樹脂を得るマレイミド化工程と、を有し、混合溶媒が、沸点１５０℃以上の芳香族炭化水素と沸点１００℃以下のアルコールとを含有し、（ａ２）成分が、ダイマージアミンとダイマージアミン以外の第２のジアミンとを含有する、製造方法。【選択図】なし