POLYAMIC ACID SOLUTION AND PRODUCTION METHOD OF LAMINATE USING THE SAME

• Main Authors: ECHIGO YOSHIAKI, SUGIMOTO YOSUKE, YOSHIDA TAKESHI, SHIGETA AKIRA, YAMADA HIROKI
• Format: Patent
• Language: English; Japanese
• Published: 18.06.2020
• Subjects: APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; SPRAYING OR ATOMISING IN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

To provide a PAA solution which can sufficiently retain adhesion of a polyimide (PI) film to a glass substrate even when a thickness of the PI film is made thick, and to provide a production method of a laminate consisting of the PI film and the glass substrate using the same.SOLUTION: A PAA solution is a solution composed of polyamic acid (PAA), a solvent and alkoxysilane. The PAA is obtained by making an aromatic diamine and an aromatic tetracarboxylic dianhydride react with each other in a solvent. A molar ratio obtained by dividing the total amount by mole of the aromatic tetracarboxylic dianhydride by that of the aromatic diamine is 1.000 or more and 1.050 or less. A production method of a laminate composed of a PI film and a glass substrate is a forming method of the PI film on the glass substrate by applying the PAA solution to the glass substrate, drying, and thermal curing, in which thermal curing is conducted by continuously rising temperature.SELECTED DRAWING: None 【課題】ポリイミド（ＰＩ）フィルムの厚みを厚くした場合であっても、ガラス基板への密着性を十分に確保することができる、ＰＡＡ溶液およびこれを用いた、ＰＩフィルムとガラス基板とからなる積層体の製造方法の提供。【解決手段】ポリアミック酸（ＰＡＡ）と溶媒とアルコキシシランとからなる溶液であり、前記ＰＡＡは、芳香族ジアミンと芳香族テトラカルボン酸二無水物とを溶媒中で反応させることにより得られ、前記芳香族テトラカルボン酸二無水物の全モル数を、前記芳香族ジアミンの全モル数で除したモル比が、１．０００以上、１．０５０以下であることを特徴とするＰＡＡ溶液。前記ＰＡＡ溶液をガラス基板に塗布、乾燥、熱硬化することにより、ＰＩフィルムをガラス基板上に形成させる方法において、熱硬化を連続的に昇温することにより行うことを特徴とするＰＩフィルムとガラス基板とからなる積層体の製造方法。【選択図】なし