发明授权
US08658743B2 Cage-shaped cyclopentanoic dianhydride, method for production thereof, and polyimide 有权
笼形环戊酸二酐,其制备方法和聚酰亚胺

Cage-shaped cyclopentanoic dianhydride, method for production thereof, and polyimide
摘要:
A cage 1,2,3,4-cyclopentanetetracarboxylic acid (1,3:2,4)-dianhydride compound represented by formula [1], and a polyimide obtained by condensing the compound with a diamine. With the compound, it is possible to provide a polyimide which shows no absorption in the ultraviolet region and is highly transparent to light, has high insulating properties, has improved heat resistance and processability, and has excellent solubility in organic solvents. (In formula [1], R1 and R2 each independently represents a hydrogen atom, a halogen atom, or a C1-10 alkyl.)
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