Fluorinated aromatic polymer and use thereof

Details Fluorinated aromatic polymer and use thereof Fluorinated aromatic polymer and use thereof

2005-04-19

2005-04-19

Seidleck, James J. (Department: 1711)

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C528S212000, C528S219000

Reexamination Certificate

active

06881811

ABSTRACT:
To provide a fluorinated aromatic polymer having excellent heat resistance and a low relative permittivity; and an insulating film for electronic devices and an insulating film for multilayered wiring boards, which are made of the polymer. A fluorinated aromatic polymer which contains two or more crosslinkable functional groups (A) per molecule and has a number average molecular weight of from 1×103to 5×105and an ether linkage and which is produced by e.g. a method in which a branched fluorinated aromatic compound (B) represented by the formula 1 and a compound (Y1) having a crosslinkable functional group (A) and a phenolic hydroxyl group, are subjected to a condensation reaction in the presence of a HF-removing agent:

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