Hygrothermal-aging-resistant polyester, polyester film and preparation method of polyester film
A technology of polyester film and heat and humidity resistance, which is applied in the field of heat and humidity resistant polyester, polyester film and its production method, and can solve problems such as difficult large-scale popularization and application, uneven blending effect, poor heat and humidity resistance and aging effect, etc. , to achieve significant moisture and heat aging resistance characteristics, improve hydrolysis resistance, and improve the effect of moisture and heat aging resistance
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Embodiment 1
[0020] The barium sulfate powder and ethylene glycol were mixed, pre-dispersed, and ball milled to prepare a barium sulfate / ethylene glycol suspension with a concentration of 18%, and the median particle size of the barium sulfate was 500nm. Add 60kg of PTA, 32kg of EG, 19.95g of ethylene glycol antimony catalyst, and 386g of the above-mentioned barium sulfate / ethylene glycol suspension into a 150L general-purpose polymerization reactor. Under the conventional esterification reaction. After the esterification reaction, carry out the pre-condensation reaction at 260°C-275°C for 45 minutes, and finally control the temperature of the polycondensation reaction at 275°C-285°C for the final polycondensation reaction. Unloading, dicing, and drying to obtain basic chips of moisture-heat-resistant aging polyester, 69.4 g of chain extender bisoxazoline was added 5 minutes before the end of discharging, and the content of chain extender in the basic chips was 0.10%. The content of bariu...
Embodiment 2
[0024] The same method as in Example 1 was used to prepare the moisture-heat aging-resistant polyester. The difference is that the inorganic additive used in the process of in-situ polymerization to prepare the basic chips is titanium dioxide with a median particle size of 300nm, and the added titanium dioxide / ethylene glycol suspension is 1928g, and the obtained damp heat aging resistant polyester basic chips have an intrinsic viscosity of 300nm. is 0.608dL / g, the carboxyl-terminal content is 15.1mol / t, the chain extender is a mixture of pyromellitic anhydride and dioxirane compound (mass ratio is 1:1), and the content of the chain extender in the basic slice 0.10%. Wherein the content of titanium dioxide in the basic slice is 0.5%. The wet heat aging resistant polyester was prepared by drum solid phase thickening test. The thickening temperature was 215°C and the thickening time was 6.5h. The prepared wet heat aging resistant polyester had an intrinsic viscosity of 0.755dL / ...
Embodiment 3
[0027] The same method as in Example 1 was used to prepare the moisture-heat aging-resistant polyester. The difference is that the inorganic additive used in the preparation of basic slices by in-situ polymerization is silica with a median particle size of 3000nm, and the added silica / ethylene glycol suspension is 193g, and the obtained moisture-heat aging-resistant polyester The intrinsic viscosity of the basic chip is 0.650dL / g, the carboxyl end content is 12.5mol / t, and the chain extender is a mixture of bicyclic imide ether compound and bicyclic carboxylic anhydride (mass ratio: 1:1). The content in chips is 0.18%, and the content of silica in polyester is 0.05%. The wet heat aging resistant polyester was prepared by the solid phase thickening test using a drum. The thickening temperature was 215°C and the thickening time was 14h. The prepared damp heat aging resistant polyester had an intrinsic viscosity of 1.00dL / g and a carboxyl terminal content of 6.4mol. / t.
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Abstract
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