Siloxane-modified hyperbranched polyimide

Details Siloxane-modified hyperbranched polyimide Siloxane-modified hyperbranched polyimide

2007-07-24

2011-12-20

Seidleck, James J (Department: 1765)

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

Synthetic resins

From carboxylic acid or derivative thereof

C528S026000, C528S033000, C528S310000

Reexamination Certificate

active

08080631

ABSTRACT:
It is an object of the present invention to provide a siloxane-modified hyperbranched polyimide which has more excellent electric properties (low dielectric property), gas permeability, mechanical properties (low modulus), surface properties (adhesiveness) and the like while maintaining thermal stability, mechanical strength, chemical resistance and processability and the like intrinsic to polyimide and which may be variously functionalized and can be utilized advantageously in industrial applications. A siloxane structure represented by the following structural formula (1) is introduced into a three-dimensional structured hyperbranched polyimide molecule.(wherein R1 represents a hydrocarbon group having from 1 to 6 carbon atoms, and n indicates an integer of from 1 to 50).

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