Polyimidesiloxane solution and method of coating substrates.

摘要

Disclosed is a solution which comprises
<UnorderedLists id="ula01" listStyle="none"><ListItem>(a) a substantially fully imidized polyimidesiloxane; and</ListItem><ListItem>(b) a solvent which comprises at least 50 wt% of a substituted pyrrolidone having the general formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="36" wi="39" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>where R is aliphatic or cycloaliphatic from C<Sub>3</Sub> to C<Sub>10</Sub>.</ListItem></UnorderedLists>

Also disclosed is a method of forming a coating on a substrate by applying the solution to the substrate and evaporating the solvent. Coatings formed from this solution are not subject to whitening as are coatings formed from the same polymers in other solvents.