Fluorine-based surfactant, coating composition, resist composition, and cured product
A surfactant, fluorine-based technology, applied in the direction of coating, pattern surface photoengraving process, instruments, etc., can solve the problem of uneven abnormal detection, inability to distinguish between normal and abnormal products, and finished color filter products rate reduction, etc.
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[0155] Examples of the method for preparing the pigment dispersion include a method through (3) a colorant kneading and dispersing step and a fine dispersion step, a method using only the fine dispersion step, and the like. In the above-mentioned kneading and dispersing step, (3) a colorant, (1) part of the alkali-soluble resin, and if necessary, the above-mentioned dispersant are mixed and kneaded. The machinery used for kneading can be enumerated: two-roll mill, three-roll mill, ball mill, drum sieve, disperser, kneader, compound motion kneader, homogenizer, mixer, single-screw or twin-screw extruder etc., by using these kneaders to disperse while applying a strong shearing force, the colorant can be dispersed. In addition, for the (3) coloring agent, it is preferable to refine the particle size by a salt mill method or the like before performing the above-mentioned kneading.
[0156] On the other hand, in the fine dispersion step, a solvent is added to the composition cont...
Embodiment 1
[0169] Example 1 (synthesis of fluorosurfactant)
[0170] 47.5 g of 2-propanol as a solvent and 25.6 g of 3-hydroxy-1-adamantyl methacrylate were put into the nitrogen-substituted flask, and it heated up to 40 degreeC, stirring under nitrogen flow. Next, 5.3 g of 2,2'-bipyridine and 1.9 g of cuprous chloride were charged, and stirred for 30 minutes while keeping the inside of the flask at 40°C. Then, 3.3 g of ethyl 2-bromoisobutyrate was added and reacted at 40° C. for 2 hours under a nitrogen stream to obtain a polymer segment having a bridged ring hydrocarbon skeleton. Next, 45.9 g of 2-(tridecafluorohexyl)ethyl methacrylate was added to the reaction system containing the polymer segment, and reacted at 40° C. for 5 hours to obtain a reactant. Next, 30 g of activated alumina was added to the obtained reactant and stirred. After filtering activated alumina, the solvent was distilled off under reduced pressure to obtain the fluorine-based surfactant (1) of the present invent...
Embodiment 2
[0171] Embodiment 2 (same as above)
[0172] 81.7 g of 2-propanol as a solvent and 40.5 g of 3-hydroxy-1-adamantyl methacrylate were charged into the nitrogen-substituted flask, and the temperature was raised to 40° C. while stirring under a nitrogen stream. Next, 7.3 g of 2,2'-bipyridine and 1.5 g of cuprous chloride were charged, and stirred for 30 minutes while keeping the inside of the flask at 40°C. Then, 2.5 g of ethyl 2-bromoisobutyrate was added and reacted at 40° C. for 2 hours under a nitrogen stream to obtain a polymer segment having a bridged ring hydrocarbon skeleton. Next, 13.7 g of 2-(tridecafluorohexyl)ethyl methacrylate was added to the reaction system containing this polymer segment, and the mixture was reacted at 40° C. for 5 hours to obtain a reactant. Next, 30 g of activated alumina was added to the obtained reactant and stirred. After filtering activated alumina, the solvent was distilled off under reduced pressure to obtain the fluorine-based surfactan...
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