Resin composition and dope for film manufacturing by solution casting method
A technology of resin composition and casting method, applied in the direction of instruments, polarizing elements, optical elements, etc., can solve the problems of easy residual alignment, easy to produce differences, etc., and achieve excellent heat resistance, fast volatilization speed, and improved productivity. Effect
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Embodiment 1
[0122] (Example 1: Manufacture of methacrylic acid polymer a)
[0123] 200 parts of deionized water and 0.5 parts of disodium hydrogen phosphate as a suspension aid were placed in an 8-liter glass reactor equipped with an H-type stirrer. Then, while stirring at 300rpm, 95 parts of MMA in which 0.3 parts of lauryl peroxide was dissolved, 5 parts of PhMI, and 0.046 parts of 2-ethylhexyl thioglycolate (2-EHTG) as a chain transfer agent were added into the reactor. The formed monomer mixture was heated up to 60°C while nitrogen substitution was carried out in the reactor to initiate polymerization. After reaching 60° C., 0.15 parts of ADEKAPULONIC F-68 (polyoxyethylene-polyoxypropylene block copolymer manufactured by ADEKA Co., Ltd., polyoxyethylene-polyoxypropylene block copolymer) was added as a suspension stabilizer as a suspension stabilizer. Thereafter, after further reacting at 60° C. for 200 minutes, the temperature was raised to 80° C. and stirred for 3 hours to complete ...
Embodiment 2～13
[0126] (Examples 2 to 13: Manufacture of methacrylic acid polymers b to m)
[0127] In the manufacture of the above-mentioned methacrylic polymer a, the type and amount of the monomer and the amount of the chain transfer agent were changed as shown in Table 1, except that the same method as the methacrylic polymer a was used. method to produce methacrylic polymers b to m.
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[0129]
Embodiment 14
[0130] (Example 14: Manufacture of methacrylic polymer n)
[0131] A predetermined amount of deionized water and 0.1 parts of disodium hydrogen phosphate as a suspending aid were placed in an 8-liter glass reactor equipped with an H-type stirrer. Next, while stirring at 300 rpm, a monomer mixed liquid composed of 90 parts of MMA in which 0.3 part of lauroyl peroxide was dissolved, 10 parts of DCPMA, and 0.01 part of 2-EHTG was added to the reactor. Next, 0.4 parts of ADEKAPULONIC F-68 was added as a suspension stabilizer, and the inside of the reactor was heated up to a predetermined temperature while substituting nitrogen in the reactor to initiate polymerization. After reaching the predetermined temperature and reacting for 120 minutes, the temperature was further increased from the above predetermined temperature and stirred for 3 hours to complete the polymerization. The obtained polymer was washed four times with deionized water three times the amount of the resin, and d...
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