Water-soluble polyimide precursor, aqueous polyimide...

Details Water-soluble polyimide precursor, aqueous polyimide... Water-soluble polyimide precursor, aqueous polyimide...

2007-11-27

2007-11-27

Woodward, Ana (Department: 1711)

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C528S310000, C528S322000, C528S350000, C528S351000

Reexamination Certificate

active

11253599

ABSTRACT:
A water-soluble polyimide precursor, which can be suitably applied for aromatic polyimides and exhibits a low reduction in heat resistance and mechanical properties, an aqueous solution of the polyimide precursor and a polyimide obtained from the precursor. A heat-resistant fiber impregnated material and an impregnated sheet-like material are prepared by using the precursor and a laminate is prepared by employing the precursor.

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