Method for producing polyimide film laminate, polyimide film laminate
A technology of polyimide film and manufacturing method, which is applied in polyamide coatings, chemical instruments and methods, coatings, etc., can solve problems such as uneconomical control and complexity, and achieve degassing suppression, good formability, and suppression of occurrence bubble effect
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[0042]The preparation of polyamic acid can preferably employ the conventionally well-known method and conditions for preparing polyamic acid. Therefore, it is not particularly limited. For example, tetracarboxylic dianhydride and diamine are preferably mixed in an organic solvent at a concentration of about 5 to 50% by mass in terms of polyimide in order to suppress polyimide. The amide bond and the carboxyl group of the amic acid are imidized, preferably at 100° C. or lower, more preferably 80° C. or lower while stirring for 0.1 to several tens of hours to obtain a uniform polyamic acid solution. If the solid content concentration in terms of polyimide is less than 5% by mass, a large amount of solvent is used, which is uneconomical, and if the solid content concentration exceeds 50% by mass, the viscosity tends to be high, making handling, etc. difficult.
[0043] As the organic polar solvent used for the preparation of the polyamic acid, conventionally known organic polar s...
Embodiment 1
[0093] 400.0 g of N-methyl-2-pyrrolidone was added as a solvent in a glass reaction vessel with an internal volume of 500 ml equipped with a stirrer and a nitrogen gas introduction and discharge pipe, and 26.8801 g (0.2485 mol) of PPD and 73.1199 g (0.2485 mol) of s-BPDA was stirred at 50° C. for 10 hours to obtain a polyamic acid solution with a solid content concentration of 18.7%, a solution viscosity of 5 Pa·s, and a logarithmic viscosity of 0.65. To this polyamic acid solution composition, 50.0 g of xylene (11% by mass in the total solvent amount) was added to obtain a uniformly dissolved polyamic acid solution composition.
[0094] The polyamic acid solution composition was coated on a glass plate of the substrate using a bar coater, and the coating film was subjected to 10 minutes at 120°C and 150°C, 60 minutes at 180°C, 200°C, and 250°C. It heat-processed each for 10 minutes at 450 degreeC and 30 minutes at 450 degreeC, and obtained the laminated body which consists of...
Embodiment 2~7
[0098] As shown in Table 1, the same operation as in Example 1 was performed except that the kind, ratio, and heat treatment conditions of the mixed solvent were changed.
[0099] The results are shown in Table 1.
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