Soluble polyimide, composition using the same, bonding sheet, adhesive laminate film for accelerator beam tube coating, and adhesive laminate film for accelerator coating of accelerator quench heater

摘要

The present invention relates to polyimide, which is obtained by reacting an acid anhydride of formula (1) and a compound of formula (2), a bonding sheet, an adhesive laminated film for an accelerator beam tube coating and a quench heater. This polyimide is soluble polyimide having a melting point of 10% or more at a solubility of 20 u00b0 C. for a low boiling point organic solvent and having a glass transition temperature of 100 u00b0 C. to 250 u00b0 C. and a water absorption rate of 1.5% or less.In formula (1), X represents a divalent organic group containing - (CH2) k - or an aromatic group, K is an integer of 1 or more or less. )General formula (2) (a), - NH. Sup. 2 - or - NCO, y, independently represent - C (= O) -, - so. Sup. -, - O -, - S -, - (-), - - (CH2) m -, - nhco -, - C (CH3) 2 -, - C (CF 3) 2 -, - C (= O) O -, or a single bond. M and N are integers ranging from 0 to 10. )