A kind of soluble polyimide-based resin polymer material and its application
A polymer material and polyimide-based technology, which is applied in the field of polyimide-based resin polymer materials and their preparation, can solve the problems of difficult to make liquid adhesives, imide is difficult to dissolve, and the rigidity of the main chain is large. And other problems, to achieve the effect of excellent dielectric strength, good light transmittance, low dielectric properties
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[0055] When the molar percentage of formula III and IV is 0%, the preparation method provided by the invention comprises the following steps:
[0056] The polymerized monomers corresponding to formulas I and II are added to the reaction kettle in molar percentages and sequentially, and the reaction system is fed with an inert gas (nitrogen, helium or argon); turn on the mechanical stirring, and react at 25°C for 30min~ 3h, and then the temperature of the reactor was raised to 80-120°C at a rate of 1-20°C / min, and reacted for 1-3h; Raise the temperature of the reactor to 100-150°C at a heating rate of / min, discharge water, react for 0.5-5 hours, and complete the reaction; discharge the material, wash with ethanol, and dry to obtain a soluble polyimide resin.
[0057] When the molar percentages of formula III and IV are not all 0%, the preparation method provided by the invention comprises the following steps:
[0058] One or several mole percentages of the polymerized monomer...
Embodiment 1
[0070] Add 3,3',4,4'-biphenyltetracarboxylic dianhydride (294g), 4,4'-diaminodiphenyl ether (210g), N,N-dimethylacetamide (1633g) together In the reactor, the reaction system is fed with nitrogen. At 25°C, start the mechanical stirring reaction for 30min; then add N,N-dimethylacetamide (1633g) to the reaction kettle, and then add pyromellitic dianhydride (222g), isophoronediamine (161.5 g) Add it into the reaction kettle, and continue stirring for 30 minutes. Then the temperature of the reactor was raised to 100°C at a heating rate of 5°C / min, and reacted for 1h; then toluene (250g) was added to the reactor, and the temperature was raised to 150°C at a heating rate of 5°C / min, and water began to flow out. After reacting for 4h, the heating was stopped. The material is discharged, washed with ethanol, and dried to obtain a soluble polyimide resin.
Embodiment 2～5
[0072] The raw materials were weighed according to the types and dosages of monomers corresponding to Examples 2-5 in Table 3, and reacted under the conditions of Example 1 to obtain the polyimide resin of the present invention.
[0073] The monomer types in Table 3 are replaced by letters and numbers, and their meanings can be obtained from Tables 1 and 2. The letters represent the corresponding columns in Table 1 and Table 2, and the numbers represent the corresponding rows in Table 1 and Table 2. For example, implementation The A1 monomer in Example 1 refers to the monomer compound indicated in the first row of column A in Table 1.
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