Patent ID: 8623968
Filing Date: 2014-01-07
Classification: C08G,C08L,Y10T

Abstract:
1. A polyimide precursor composition comprising: a polyamic acid comprising a repeating unit represented by the following Chemical Formula 1; and a diisocyanate represented by the following Chemical Formula 2, wherein the diisocyanate represented by the following Chemical Formula 2 is included in an amount of about 0.01 moles to about 10 moles based on 100 moles of the repeating unit represented by the following Chemical Formula 1 in the polyamic acid: wherein, in Chemical Formula 1, Cy is the same or different in each repeating unit, and each Cy is independently a tetravalent functional group comprising a substituted or unsubstituted C4 to C20 carbocyclic group, a substituted or unsubstituted C6 to C20 monocyclic aromatic group, a substituted or unsubstituted C2 to C20 condensed polycyclic aromatic group, C2 to C20 non-condensed polycyclic aromatic groups linked to each other through a substituted or unsubstituted aromatic group, or a combination comprising at least one of the foregoing, A R n1 is an integer of from 1 or greater, n2 is an integer of from 0 to 10, and n1+n2 is determined by a valence of A wherein, in Chemical Formula 2, A