NON-CROSSLINKED POLYMALEIMIDE, METHOD OF PRODUCING THE SAME, AND BINDER SOLUTION FOR POWER STORAGE ELEMENT

• Main Authors: MORIKITA TATSUYA, ECHIGO YOSHIAKI, YOSHIDA TAKESHI, SHIGETA AKIRA, YAMADA HIROKI
• Format: Patent
• Language: English; Japanese
• Published: 01.11.2018
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; ELECTRICITY; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; THEIR PREPARATION OR CHEMICAL WORKING-UP

To provide a polyimide-based polymer excellent in adhesiveness of an active substance layer with a power collector, excellent in cycle characteristics, and capable of forming an active substance layer in which an amide solvent does not remain, a method of producing the same, and a binder solution for a power storage element composed of the polymer.SOLUTION: 1. A non-crosslinked polymaleimide has following characteristics: (1) the monomer is an olygoimide maleimidized at both terminals, (2) the polymaleimide is soluble in a solvent composed of a hydrocarbon solvent and/or an ester solvent, and (3) the weight average molecular weight measured by GPC is more than 10,000 and 500,000 or less. 2. The method of producing the non-crosslinked polymaleimide is characterized in that the olygoimide maleimidized at both terminals is thermally polymerized in a solvent at 100°C or higher. 3. The binder solution for a power storage element is composed of the non-crosslinked polymaleimide, and substantially does not contain an amide solvent.SELECTED DRAWING: None 【課題】活物質層と集電体との接着性が良好であり、サイクル特性が良好な、アミド系溶媒が残留しない活物質層が形成できるポリイミド系高分子およびこの製造方法ならびにこの高分子からなる蓄電素子バインダ溶液の提供を目的とする。【解決手段】＜１＞ 以下の特徴を有する非架橋のポリマレイミド。（１）モノマが両末端マレイミド化オリゴイミドである。（２）炭化水素系溶媒および／またはエステル系溶媒からなる溶媒に可溶である。（３）ＧＰＣにより測定された重量平均分子量が、１００００超、５０００００以下である。＜２＞ 両末端マレイミド化オリゴイミドを、溶媒中、１００℃以上で熱重合することを特徴とする前記非架橋ポリマレイミドの製造方法。＜３＞ 前記非架橋のポリマレイミドからなり、アミド系溶媒を実質的に含有しない蓄電素子用バインダ溶液。【選択図】なし