Polyester of terephthalic acid, method for the production thereof, and use of the same
A technology of terephthalic acid and polyester, applied in the direction of one-component copolyester rayon filament, etc., can solve the problems of unrealized constant yarn quality level and high cost, and achieve low by-products/decomposition products, cost Beneficial, lower melting temperature effect
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[0031] Embodiment: adopt 10mol% 1, the modification of 2-butanediol
[0032] 12,126 g dimethyl terephthalate (62.44 mol), 7,848.8 g ethylene glycol (126.45 mol) and 1,266.22 g 1,2-butanediol were placed in a 20-liter stainless steel reactor at Mn(OAc) 2 4H 2 Catalyzed by O, transesterification was performed under methanol dissociation in a conventional manner, and the formed copolyester was prepared on Sb 2 o 3 Catalyzed polycondensation to form copolyesters. The reaction can be carried out here at 260°C.
[0033] DSC measurements were performed in the temperature range of 30-300° C. with a heating rate of 10 K / min under nitrogen atmosphere.
[0034] The polyester is conventionally spun into fibers by melt spinning. Very good spinnability of 3000-6000 m / min has been shown.
[0035] Table 1 below shows the effect of modification on melting temperature and spinning temperature.
[0036] Table 1:
[0037] unmodified polyester
10% 1,2-butanediol modified ...
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