Liquid-crystal polyester resin composition
A technology of resin composition and liquid crystal polyester, applied in the directions of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of easy change, reduced productivity of the molded body, long cooling time, etc., and achieves stable plasticizing time and stable molding process. Effect
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[0262] Hereinafter, the present invention will be further described in detail by using specific examples. However, this invention is not limited at all by the Example shown below.
[0263] In addition, in this Example and a comparative example, the volume average particle diameter, a melting point, and a particle shape were measured by the following methods, respectively.
[0264]
[0265] The volume average particle diameter was measured by the laser diffraction method under the following conditions.
[0266] Measurement conditions
[0267] Measuring device: laser diffraction / scattering particle size distribution measuring device (manufactured by HORIBA Co., Ltd.; LA-950V2);
[0268] Refractive index of particles: 1.53-0.1i;
[0269] Dispersion medium: water;
[0270] Dispersion medium refractive index: 1.33.
[0271]
[0272] The melting point was measured using a differential thermal analyzer (manufactured by Shimadzu Corporation; DTA-50). The endothermic peak tem...
manufacture example 1
[0301] Add p-hydroxybenzoic acid (994.5 g, 7.20 moles), terephthalic acid (272.1 g, 1.64 moles), isophthalic acid (272.1 g, 1.64 moles) and Formic acid (126.6 g, 0.76 mol), 4,4'-dihydroxybiphenyl (446.9 g, 2.40 mol), and 1347.6 g (13.20 mol) of acetic anhydride. After replacing the gas in the reactor with nitrogen, 0.18 g of 1-methylimidazole was added, and the temperature was raised from room temperature to 150° C. over 30 minutes while stirring under nitrogen flow, and refluxed at 150° C. for 30 minutes.
[0302] Then, after adding 2.4 g of 1-methylimidazole, while distilling off by-produced acetic acid and unreacted acetic anhydride, the temperature was raised from 150° C. to 320° C. over 2 hours and 50 minutes. To complete the reaction, the contents were taken out from the reactor and cooled to room temperature to obtain a prepolymer (solid matter).
[0303] Then, the prepolymer was pulverized using a pulverizer, and the obtained pulverized product was heated from room te...
manufacture example 2
[0305] Add p-hydroxybenzoic acid (994.5 g, 7.20 moles), terephthalic acid (299.0 g, 1.80 moles), isophthalic acid (299.0 g, 1.80 moles) and Formic acid (99.7g, 0.60 mol), 4,4'-dihydroxybiphenyl (446.9g, 2.40 mol) and acetic anhydride (1347.6g, 13.20 mol), after replacing the gas in the reactor with nitrogen, add 1- 0.18 g of methylimidazole was heated from room temperature to 150° C. over 30 minutes while stirring under a nitrogen stream, and refluxed at 150° C. for 1 hour.
[0306] Then, after adding 2.4 g of 1-methylimidazole, while distilling off by-produced acetic acid and unreacted acetic anhydride, the temperature was raised from 150° C. to 320° C. over 2 hours and 50 minutes. To complete the reaction, the contents were taken out from the reactor and cooled to room temperature to obtain a prepolymer (solid matter).
[0307] Then, the prepolymer was pulverized using a pulverizer, and the obtained pulverized product was heated from room temperature to 250° C. in a nitroge...
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