Polyamic acid polymer composite and preparation method thereof

摘要

The present invention relates to a polyamic acid polymer composite and a method for producing the same, and more specifically, a polyamic acid polymer composite, which can be applied to display substrate production due to its high transparency and low thermal expansion of glass-level, and a method for producing same. The polyamic acid polymer composite comprises 50 to 99 wt % of a polyamic acid polymer having a repeating unit of Chemical Formula 1; and 1 to 50 wt % of a silica-based particle:;wherein, R1 to R3, m and n have the same meanings as defined in the specification.

主权项

1. A polyamic acid polymer composite comprising: 50 to 99 wt % of a polyamic acid polymer having a repeating unit of Chemical Formula 1; and 1 to 50 wt % of a silica-based particle, wherein a silicon atom on the surface of the silica-based particle is chemically bonded to R3 of Chemical Formula 1: wherein, R1 is selected from the group consisting of divalent aromatic and cycloaliphatic organic groups, wherein one or more hydrogen atoms in the aromatic or cycloaliphatic rings are substituted with a fluoroalkyl group with carbon number 1 to 10; R2 is selected from the group consisting of tetravalent aromatic, cycloaliphatic and aliphatic organic groups; R3 is selected from the group consisting of trivalent or higher valent organic groups, which are derived from aromatic, cycloaliphatic or aliphatic groups having a hydroxyl group, wherein one or more hydrogen atoms in the organic group of R3 are substituted with a fluoroalkyl group with carbon number 1 to 10; and n and m are each independently an integer of 1 or more; wherein R1 of Chemical Formula 1 is a divalent organic group, which is selected from the group consisting of divalent aromatic organic groups of Chemical Formulas 2a to 2d; divalent organic groups of Chemical Formula 2e; and divalent cycloaliphatic organic groups comprising a cycloalkandiyl structure with carbon number 4 to 18: wherein, R11 to R17 are each independently a fluoroalkyl group with carbon number 1 to 10; a1 is an integer of 1 to 4; b1 is an integer of 1 to 6; c1 is an integer of 1 to 3; d1 and e1 are each independently an integer of 0 to 4, with the proviso that d1 and e1 cannot be 0 at the same time; f1 and g1 are each independently an integer of 0 to 10, with the proviso that f1 and g1 are cannot be 0 at the same time; and A11 and A12 are a single bond.