Preparation method of modified polyester chip and polyester film

A technology for modifying polyester and slicing, applied in the field of polyester materials, can solve the problems of dispersibility, stability or compatibility of nucleating agents, can not meet the needs of high-end fields, fogging and other problems

Active Publication Date: 2020-04-28
中山市泓溢薄膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing polyester film has good light transmittance, it still has the problem of fogging, which cannot meet the needs of high-end fields
[0003] The above problems can be alleviated to a certain extent by adding a nu

Method used

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  • Preparation method of modified polyester chip and polyester film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Disperse POSS-octahydroxypropyldimethylsilyl in ethylene glycol, ultrasonically disperse for 0.5h, and then mix with terephthalic acid, biphenyl dicarboxylic acid, 1,2-propylene glycol, zinc acetate, antimony glycol , the content of POSS-octahydroxypropyl dimethyl silyl is 0.8wt%, the molar ratio of terephthalic acid and biphenyl dicarboxylic acid is 15:1, and the molar ratio of zinc acetate and ethylene glycol antimony is 1:5 , the total molar weight of zinc acetate and ethylene glycol antimony is 0.08% of the total molar weight of terephthalic acid and biphenyl dicarboxylic acid, the molar ratio of ethylene glycol and 1,2-propanediol is 10:1, and the total alkyd molar The ratio is 2:1.

[0019] Heat the mixture of the above-mentioned components to 235°C until the water output reaches 95% of the theoretical value, vacuumize for the first time to a pressure of 0.03MPa, raise the temperature to 260°C, react at constant temperature and pressure for 2 hours, and then vacuu...

Embodiment 2

[0021] Disperse POSS-octahydroxypropyldimethylsilyl in ethylene glycol, ultrasonically disperse for 0.5h, and then mix with terephthalic acid, biphenyl dicarboxylic acid, 1,2-propylene glycol, zinc acetate, antimony glycol , the content of POSS-octahydroxypropyl dimethyl silyl group is 1wt%, the mol ratio of terephthalic acid and biphenyl dicarboxylic acid is 20:1, the mol ratio of zinc acetate, ethylene glycol antimony is 1:4, The total molar weight of zinc acetate and ethylene glycol antimony is 0.1% of the total molar weight of terephthalic acid and biphenyl dicarboxylic acid, the molar ratio of ethylene glycol and 1,2-propanediol is 12:1, and the total alkyd-acid molar ratio 1.8:1.

[0022] Heat the mixture of the above components to 240°C until the water output reaches 95% of the theoretical value, vacuumize for the first time until the pressure is 0.05MPa, raise the temperature to 265°C, react at constant temperature and pressure for 1.5h, and then vacuumize for the seco...

Embodiment 3

[0024] Compared with Example 1, the difference is that the content of POSS-octahydroxypropyldimethylsilyl is 0.5wt%.

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Abstract

The invention discloses a preparation method of a modified polyester chip and a polyester film. The method comprises the following steps: dispersing POSS-octahydroxy propyl dimethyl silicon in ethylene glycol, performing ultrasonic dispersion, then mixing with terephthalic acid, biphenyl dicarboxylic acid, 1, 2-propylene glycol, zinc acetate and ethylene glycol antimony, controlling the molar ratio of alcohol to acid to be not less than 1.5: 1, heating to 230-240 DEG C until the water yield reaches 95% or above of a theoretical value, vacuumizing for the first time, heating to 260-265 DEG C, carrying out constant-temperature and constant-pressure reaction for 1-2 hours, vacuumizing for the second time to increase the vacuum degree, carrying out constant-temperature and constant-pressure reaction for 0.5-1 hour at 265-275 DEG C, reducing the pressure, discharging, cooling and granulating to prepare the modified polyester chip. The prepared polyester chip can be used for preparing a biaxially oriented polyester film, and has good mechanical properties and optical properties.

Description

technical field [0001] The invention relates to the technical field of polyester materials, in particular to a preparation method of a modified polyester chip and a polyester film. Background technique [0002] Polyester film was first industrialized in the 1950s, and is now widely used in packaging, electronic components, liquid crystal displays and other fields. Biaxially oriented polyester film is usually made of polyester chips, which are dried, extruded, longitudinally stretched, and transversely stretched. It has high strength, good thermal stability, acid and alkali resistance, good air tightness, and optical properties. Good and other advantages. With the rapid development of liquid crystal display industry and solar energy industry, the market demand for optical grade polyester film is increasing, and the performance requirements are also getting higher and higher. Although the existing polyester film has good light transmittance, it still has the problem of foggi...

Claims

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Application Information

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IPC IPC(8): C08G63/78C08G63/695C08L67/02C08J5/18
CPCC08G63/6956C08G63/78C08J5/18C08J2367/02
Inventor 李震宇
Owner 中山市泓溢薄膜科技有限公司
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