Photo-cross-linking polyimide resin
A technology of polyimide resin and photosensitive polyimide, which can be used in optics, optomechanical equipment, photo-engraving process of pattern surface, etc., and can solve problems such as limiting polyimide photosensitivity.
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Embodiment 1
[0042] Add 70ml of solvent γ-butyrolactone into a dry and clean glass bottle, pass nitrogen protection, then add 3.048g of 4,4'-methylenebis(2,6-dimethylaniline) (12mmol) and 3.003g (6 mmol) of 1,4 bis(4-aminophenoxy)-2,5-dibenzoylbenzene, after all dissolved, slowly add 7.992 g (18 mmol) of 4,4'-( Hexafluoroisopropylidene) bis(phthalic anhydride), react at room temperature and keep stirring for 8-12 hours, add imidization reagent, acetic anhydride and triethylamine in excess of the molar number of amino groups, maintain nitrogen protection, room temperature Continue stirring for 10-20 hours. The obtained polymer solution was precipitated into methanol, stirred and washed, and dried in a vacuum oven for 8 hours to obtain a photocrosslinked polyimide resin whose side group was benzophenone—test sample No. 1.
Embodiment 2
[0044] Add 60ml of solvent γ-butyrolactone into a dry and clean glass bottle with a water separator, pass through nitrogen for protection, and then add 3.048g of 4,4'-methylenebis(2,6-dimethylaniline) ( 12mmol) and 3.916g (6 mmol) of 1,4-bis(4-aminophenoxy)-2,5-(4-phenylbenzoyl)benzene, after all dissolved, slowly add 7.992 g (18 mmol) of 4, 4'-(hexafluoroisopropylidene) bis(phthalic anhydride), react at room temperature and keep stirring for 8-12 hours, slowly drop in toluene and raise the temperature to 160°C, toluene Evaporate and dehydrate for 6 hours. The obtained polymer solution was precipitated into methanol, stirred and washed, and dried in a vacuum oven for 5 hours to obtain a photo-crosslinked polyimide resin whose side group was benzophenone—test sample No. 2.
Embodiment 3
[0046] Add 50ml of solvent N,N-dimethylacetamide to a dry and clean glass bottle, nitrogen protection, then add 2.54g of 4,4'-methylenebis(2,6-dimethylaniline) (10mmol ) and 1.682 g (3 mmol) of 1,4-bis(4-aminophenoxy)-2,5-bis(4-methoxybenzoyl)benzene, after all dissolved, slowly add 5.772 g (13mmol) of 4,4'-(hexafluoroisopropylidene) two (phthalic anhydride), react at room temperature and keep stirring for 12 hours, add imidization reagent, acetic anhydride and Triethylamine was maintained under nitrogen protection, and stirring was continued at room temperature for 7 hours. The obtained polymer solution was precipitated into methanol, stirred and washed, and dried in a vacuum oven for 5 hours to obtain a photo-crosslinked polyimide resin whose side group was benzophenone—test sample No. 3.
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Abstract
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