Polyimide precursor composition and polyimide composition
A polyimide precursor, polyimide technology, applied in electric solid devices, semiconductor devices, chemical instruments and methods, etc., can solve the problems of blurred color, narrowed viewing angle, and incorrect color display, etc. The effect of small phase retardation, excellent properties, excellent transparency
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preparation example Construction
[0161] As the solvent used in the preparation of the polyimide precursor (A1), preferably, for example, water or such as N,N-dimethylformamide, N,N-dimethylacetamide, N-methyl-2-pyrrolidone , 1,3-dimethyl-2-imidazolinone and dimethyl sulfoxide and other aprotic solvents. However, any solvent may be conveniently used under the condition that the initial monomer components and the formed polyimide precursor can be dissolved in the solvent, and thus the solvent is not limited to the above structure. As the solvent, water; or amide solvents such as N,N-dimethylformamide, N,N-dimethylacetamide, and N-methylpyrrolidone; cyclic ester solvents such as γ-butyrolactone, γ-valerolactone, δ-valerolactone, γ-caprolactone, ε-caprolactone, and α-methyl-γ-butyrolactone; carbonate solvents such as ethylene carbonate and propylene carbonate; glycols Solvents such as triethylene glycol; phenolic solvents such as m-cresol, p-cresol, 3-chlorophenol and 4-chlorophenol; acetophenone, 1,3-dimethyl-2...
Embodiment
[0267] Hereinafter, the present invention will be further described with reference to Examples and Comparative Examples. However, the present invention is not limited to the Examples described below.
[0268] In each of the examples described below, evaluation was performed by the following method.
[0269]
[0270] [Phase retardation in the in-plane direction of the film (R e ) and the phase delay in the thickness direction (R th )]
[0271] R e and R th . in R th Phase retardation measurements of the films were performed at an incident angle of 40°. The phase retardation in the thickness direction of the film having a thickness of 10 μm was determined from the obtained phase retardation.
[0272] [total transmittance]
[0273] The light transmittance in total light transmittance (average transmittance from 380 nm to 780 nm) of the polyimide film having a thickness of 10 μm was measured using a UV-visible spectrophotometer V-650DS (manufactured by JASCO Corporation...
Embodiment S-1
[0305] 9.09g (0.04mol) of DABAN, 5.41g (0.05mol) of PPD and 3.68g (0.01mol) of BAPB were placed in a reactor purged with nitrogen, and 509.58g of N-methyl-2-pyrrolidone was added to it to fill the The total mass of the monomers (the total mass of the diamine component and the carboxylic acid component) was 10% by mass, and the mixture was then stirred at room temperature for 1 hour. To the resulting solution was gradually added 38.44 g (0.10 mol) of CpODA. The mixture was stirred at room temperature for 12 hours to obtain a homogeneous viscous solution of polyimide precursor (polyamic acid). With a planetary ball mill (premium-line P-7) from Fritsch and using 50 g of 0.3 mm ZrO 2 10 g of the obtained polyimide precursor solution and 40 g of strontium carbonate dispersion (2) were treated for 90 minutes to obtain strontium carbonate dispersion (4).
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