SOLUBLE THERMOPLASTIC POLYIMIDE COMPOSITION, METHOD OF MAKING THE COMPOSITION, POLYIMIDE METAL LAMINATE HAVING CONNECTING LAYER MADE FROM THE COMPOSITION, AND METHOD OF MAKING THE LAMINATE
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United States of America Patent
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Feb 25, 2016
app pub date -
Oct 9, 2014
filing date -
Aug 21, 2014
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Abstract
A method of making a soluble thermoplastic polyimide composition, which comprises the steps of: polymerizing a first diamine, a second diamine different from the first diamine, and a dianhydride in a polar aprotic solvent to obtain a polyamine acid, wherein the first diamine contains a carboxyl group; and imidizing the polyamine acid to obtain the composition, wherein the composition contains the carboxyl group. By controlling the content of the dianhydride within a range from 85 mol. % to 99 mol. % based on the total content of the first diamine and the second diamine, the soluble thermoplastic polyimide composition made from the method can be laminated with a commercial polyimide film and a metal foil via simple steps of coating, drying, and pressing, to form a polyimide metal laminate. Therefore, by utilizing the soluble thermoplastic polyimide composition made from the method, making a polyimide metal laminate is simple and economical.
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