Acid anhydride and polyimide using the same

Details Acid anhydride and polyimide using the same Acid anhydride and polyimide using the same

2007-03-20

2007-03-20

Woodward, Ana (Department: 1711)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

C528S044000, C528S084000, C528S176000, C528S191000, C528S219000, C528S347000, C525S397000, C525S420000

Reexamination Certificate

active

10868799

ABSTRACT:
An acid anhydride of the formula (4), and a polyimide using the acid anhydride,wherein anhydrides are substituted at sites 3 or sites 4,which acid anhydride is obtained from, as a raw material, a bifunctional phenylene ether oligomer having a number average molecular weight of 500 to 3,000, represented by the formula (1).

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patent: WO 02/102756 (2002-12-01), None

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