Abstract:
The present invention provides a polyimide precursor that serves to produce a cured film that has high light permeability in combination with low birefringence and low linear thermal expansion. The polyimide precursor includes at least an acid dianhydride residue as represented by Formula (1), a diamine residue as represented by Formula (2), and one or more diamine residues as represented by Formula (3), the acid dianhydride residue as represented by Formula (1) accounting for 50 mol % or more of the total quantity of acid dianhydride residues in the polyimide precursor, the diamine residue as represented by Formula (2) accounting for 50 mol % or more of the total quantity of diamine residues in the polyimide precursor, and the diamine residue as represented by Formula (3) accounting for 15 mol % or less of the total quantity of diamine residues in the polyimide precursor.
Abstract:
The present invention is a substrate for a display, the substrate having a film B including a polysiloxane resin on at least one surface of a film A including a polyimide resin, wherein the film B contains inorganic oxide particles therein, and the present invention has an object to provide a substrate for a display: being able to be applied to a color filter, an organic EL element, or the like without the need to carry out any complex operations; allowing high-definition displays to be manufactured; and being provided with a low CTE, a low birefringence, and flexibility.
Abstract:
The present invention is directed to a polyimide precursor having a unit structure expressed by a general formula (1) and a unit structure expressed by a general formula (2). [Chem. 1] (In the general formulas (1) and (2) , X1 to X4 each independently represent a hydrogen atom, a monovalent organic group with 1 to 10 carbon atoms or a monovalent alkylsilyl group with 1 to 10 carbon atoms. R1 is represented by a general formula (3) and R2 is represented by a general formula (4).) [Chem. 2] (In the general formula (4), R3 and R4 each independently represent a monovalent organic group with 1 to 10 carbon atoms.) According to the present invention, there is provided a polymide precursor which does not cause white turbidity, cracking and foaming of a film irrespective of the curing condition of the polyimide resin film. There is also provided a flexible TFT array, a flecible color filter and a flexible substrate with a gas barrier layer and a flexible display panel prepared therewith.