Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Reexamination Certificate
2008-08-05
2010-12-28
Jagannathan, Vasu (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
C528S310000, C528S350000, C528S351000, C524S430000, C524S437000, C524S445000, C524S449000
Reexamination Certificate
active
07858734
ABSTRACT:
A polyimide material comprises a polyimide. The polyimide has repeating units of formula (I). The polyimide material further comprises a coupling agent-containing filler.A method for preparing a polyimide material comprises allowing a mixture comprising an aromatic tetracarboxylic dianhydride, an aromatic diamine, and a coupling agent-containing filler to react to produce a polyamic acid. The method further comprises contacting the polyamic acid with an aliphatic dicarboxylic acid of formula (II) to produce an intermediate, and imidizing the intermediate to produce the polyimide material.A polyimide comprises repeating units of formula (I).
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Yang, S.Y., Park, C.E., Jung, M.S. Polymer, vol. 44, p. 3243-3249, 2003.
Jiang Lin
Li Chengzhang
Li Qiang
Brinks Hofer Gilson & Lione
BYD Co. Ltd.
Jagannathan Vasu
Sheh Anthony H
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