Adhesive and adhered thin film
A technology of adhesives and adhesive properties, applied in the direction of adhesives, pressure-sensitive films/sheets, non-polymer adhesive additives, etc., can solve problems such as poor practicability, poor solubility, and insufficient film flexibility
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Embodiment 1
[0059] Into a 500mL 5-neck flask equipped with a thermometer, stirrer, nitrogen inlet tube, dropping funnel with side tube, Dean-Stark trap, and condenser tube, add 4,4'-di Amino diphenyl ether 10.0g (0.05 moles) and N-methyl-2-pyrrolidone 85g as a solvent were dissolved, and then the 1,2,4,5-cyclohexane tetrachloride synthesized in the reference example was 11.2 g (0.05 mol) of acid dianhydride solids were added in portions over 1 hour, and stirred at room temperature for 2 hours. Then add 30.0 g of azeotropic dehydration solvent xylene, heat up to 180°C, react for 3 hours, use a Dean-Stark water separator to carry out xylene reflux, and azeotropically separate and remove the produced water. After 3 hours, after confirming that the distillation of water was completed, xylene was distilled off while raising the temperature to 190°C for 1 hour, and after recovering 29.0 g, air cooled to an internal temperature of 60°C to obtain an organic solvent for polyimide solution. The o...
Embodiment 2
[0064]The polyimide solution obtained in Example 1 was coated on a glass plate, heated on a heating plate at 90° C. for 1 hour to evaporate the solvent, and then peeled off from the glass plate to obtain an independent film. The independent film was fixed to a stainless steel fixing jig, and the solvent was further evaporated by heating at 220° C. for 2 hours in a hot air drier to obtain a light brown flexible adhesive polyimide film with a film thickness of 80 μm. Next, sandwich the obtained adhesive polyimide film between two commercially available steel plates (cold-rolled steel plate, JIS K6848, 1.6 × 25 × 100mm), and carry out 30 minutes by a hot press with a set temperature of 330°C. Minute heat press bonding. The tensile and shear bond strengths at room temperature and 200°C are shown in Table 1. The results showed good bonding performance.
Embodiment 3
[0076] Add 11.2 g (0.05 moles) of 1,2,4,5-cyclohexanetetracarboxylic dianhydride synthesized in the reference example and N-dimethyl - 40.0 g of 2-pyrrolidone was dissolved, and at room temperature, 10.5 g (0.05 moles) of 4,4'-diaminodicyclohexylmethane was dissolved in 45.0 g of dimethylacetamide to form a solution that was dropped through a dropping funnel for 2 hours. add. After the dropwise addition, the temperature was raised to 90° C. and stirred for 1 hour. Then add 30.0 g of azeotropic dehydration solvent xylene, then raise the temperature to 180° C., react for 3 hours, reflux the xylene with a Dean-Stark trap, and azeotropically separate the generated water. After 3 hours, it was confirmed that the evaporation of water was completed, and xylene was evaporated while raising the temperature to 190° C. over 1 hour, and 30.0 g was recovered. Then, it was air-cooled until the internal temperature became 60° C., and an organic solvent solution of polyimide was obtained. ...
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