Siloxane compound and polyimide precursor composition comprising same
AssigneeLG Chem, Ltd.
InventorCheolmin Yun
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Abstract
The present invention provides a siloxane compound having a novel structure, the compound not being reactive with a polyamic acid which is a polyimide precursor. In addition, provided is a polyimide precursor composition having improved storage stability by adding the siloxane compound as an enhancer for adhesion between a polyimide and a substrate made of an inorganic material. According to the present invention, provided is a multifunctional polyimide film having improved adhesiveness with a substrate made of an inorganic material while having improved optically isotropic characteristics and reduced residual stress characteristics with respect to a substrate.
Claims13
A polyimide precursor composition comprising:
- a siloxane compound represented by formula 1 or formula 2 and a polyamic acid:
- in the formulas 1 and 2,
- Q2, Q3 and Q4 are each independently selected from a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, and an alkoxy group having 1 to 5 carbon atoms,
- R1, R2, R11 and R12 are each independently a single bond or an organic group having 1 to 20 carbon atoms,
- R3 to R10 are each independently an aliphatic group having 1 to 3 carbon atoms or an aromatic group having 6 to 12 carbon atoms, and
- m1 and m2 are each independently an integer of 0 or more,
- wherein the polyimide precursor composition has a viscosity of 3,000 cP to 9,000 cP at 25° C.
Dependencies are inferred from the claim text.