Patent ID: 8623968

Claim:
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 1 is a substituted or unsubstituted C1 to C20 alkylene group, a substituted or unsubstituted C5 to C40 arylene group, a substituted or unsubstituted C6 to C40 aralkylene group, a substituted or unsubstituted C3 to C40 heteroarylene group, a substituted or unsubstituted C6 to C40 heteroaralkylene group, a substituted or unsubstituted C5 to C40 cycloalkylene group, a substituted or unsubstituted C5 to C40 heterocycloalkylene group, a substituted or unsubstituted C2 to C40 siloxane, or a combination comprising at least one of the foregoing, R 1 is hydrogen, a substituted or unsubstituted C1 to C15 alkyl group, a substituted or unsubstituted C1 to C15 alkoxy group, a substituted or unsubstituted C1 to C15 fluoroalkyl group, a substituted or unsubstituted C3 to C15 cycloalkyl group, a substituted or unsubstituted C3 to C15 heterocycloalkyl group, a substituted or unsubstituted C3 to C15 cycloalkyloxy group, a substituted or unsubstituted C6 to C15 aryl group, a substituted or unsubstituted C7 to C15 aralkyl group, a substituted or unsubstituted C6 to C15 aryloxy group, a substituted or unsubstituted C7 to C15 aralkyloxy group, a substituted or unsubstituted C2 to C15 heteroaryl group, a substituted or unsubstituted C3 to C15 heteroaralkyl group, or a combination comprising at least one of the foregoing, 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 1 , OCN-A 2 -NCO Chemical Formula 2 wherein, in Chemical Formula 2, A 2 is a substituted or unsubstituted C1 to C20 alkylene group, a substituted or unsubstituted C5 to C40 arylene group, a substituted or unsubstituted C6 to C40 aralkylene group, a substituted or unsubstituted C3 to C40 heteroarylene group, a substituted or unsubstituted C4 to C40 heteroaralkylene group, a substituted or unsubstituted C5 to C40 cycloalkylene group, a substituted or unsubstituted C5 to C40 heterocycloalkylene group, or a combination comprising at least one of the foregoing.