Polyester resin, preparation method therefor, and copolymer polyester film manufacturing method using same
A polyester resin and film technology, applied to polyester resin and its preparation, can solve the problems of environmental protection and high energy consumption, and achieve the effects of excellent calendering processability, low heat of crystallization, and excellent surface hardness
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Embodiment 1
[0288] Example 1: Preparation of polyester resin for calendering
[0289] Copolyester resins were prepared using the components in amounts shown in Table 1 below.
[0290] First, the components shown in Table 1 below were charged into a 30-liter reactor equipped with a stirrer and an outlet condenser, with 20 kg of the final polymer as the base amount, so that the dicarboxylic acid component and the diol component The molar ratio is 1:1.35. Subsequently, the pressure in the reactor was raised to 2.0 kg / cm with nitrogen 2 , and the temperature of the reactor was gradually raised to 255° C. for the reaction. In this case, the resulting water is drained out of the system to carry out the esterification reaction. When the generation and removal of water was complete, the reaction product was transferred to a polycondensation reactor equipped with a stirrer, cooling condenser and vacuum system.
[0291] An antimony-based catalyst (antimony triethylene glycol, Sigma-Aldrich) and...
Embodiment 2 to 4 and comparative example 1 to 4
[0292] Examples 2 to 4 and Comparative Examples 1 to 4, 6 and 7
[0293] A copolyester resin for calendering was prepared in the same manner as in Example 1 except that the components were used in the amounts shown in Table 1 below to prepare the copolyester resin.
Embodiment 5
[0312] Example 5: Films made from copolyester resins
[0313] 5-1: Preparation of copolyester resin
[0314] To prepare the copolyester resin, ethylene glycol (EG), neopentyl glycol (NPG) as the diol component, and terephthalic acid (TPA) as the dicarboxylic acid component were charged into an agitator equipped with a In the 2500 liter reactor of the outlet condenser, 2000 kg of final polymer was used as the base amount. A diol component and a dicarboxylic acid component were added, wherein 1.5 mol of the diol component was added for every 1 mol of the dicarboxylic acid component added. The molar ratio between the diol components is 5:5 for the molar ratio of EG to NPG.
[0315] Subsequently, the pressure in the reactor was raised to 2.0 kg / cm with nitrogen 2 , and the temperature of the reactor was raised to 265° C. for the reaction. In this case, the resulting water is drained out of the system to carry out the esterification reaction. When the generation and removal ...
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