High purity aromatic polyesters
AssigneeMinnesota Mining and Manufacturing Company
InventorsEdward F. Hampl, Jr., Mohammad Iqbal
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Abstract
This invention provides oligomer-free polyesters that consist essentially of repeating, interpolymerized units derived from isophthalic acid and/or terephthalic acid, and 9,9-bis-(4-hydroxyphenyl)-fluorene, a process for making such polyesters and articles comprising said polyesters such as electrical capacitors, optical films and fibers.
Claims10
An electrical device comprising an electrical conductor insulated with an oligomer-free polyester consisting essentially of repeating, interpolymerized units derived from 9,9-bis-(4-hydroxyphenyl)-fluorene and isophthalic acid and/or terephthalic acid, wherein said electrical conductor is present as a layer of electrically conductive material, the device incorporating a plurality of said electrically conductive layers assembled in overlying relationship, and said polyester is present in the form of one or more layers interleaved between adjacent layers of said electrically conductive material.
Dependencies are inferred from the claim text.