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Polyester resin and preparation method thereof

A technology of polyester resin and polyester, applied in the field of polyester resin and its preparation, can solve the problems of poor moisture permeability of membrane materials, affecting the application of membrane materials, waste of materials, etc., and achieve the effect of good moisture permeability

Inactive Publication Date: 2020-06-19
ZHUHAI WANTONG CHEM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, polyester resin also has the following defects: when polyester resin is made into a film material, the moisture permeability of the film material is poor, which affects the application of the film material
At present, the moisture permeability of membrane materials is mainly adjusted by the thickness of the membrane, such as PE membrane, and this adjustment method has certain defects. Too thick may cause material waste, and too thin may sacrifice the mechanical properties of the material.

Method used

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  • Polyester resin and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1-15

[0037] Embodiment 1-15: the synthesis of polyester resin:

[0038]Under the protection of high-purity nitrogen, put the measured amount of non-conjugated dicarboxylic acid and 1,4-butanediol into the reactor, raise the temperature to 160-180°C and react for 20-40min; put the conjugated dicarboxylic acid into the reactor , add tetrakis(2-ethylhexyl) titanate, heat up to 200-220°C and react for 1-2 hours, wherein the amount of conjugated dicarboxylic acid accounts for 60wt% of the total amount of conjugated dicarboxylic acid, tetrakis(2 The addition of -ethylhexyl) titanate accounts for 30wt% of the total amount of tetrakis (2-ethylhexyl) titanate; the remaining 40wt% of conjugated dicarboxylic acid is put into the reactor, adding tetrakis (2- Tetra(2-ethylhexyl) titanate with a total amount of 30wt% of ethylhexyl) titanate, heated to 220-230°C and reacted for 2-3 hours; then add the remaining tetra(2-ethylhexyl) titanate For ester, vacuumize the pressure in the reactor to belo...

Embodiment 1

[0040] The parts of sebacic acid were 26.52, the parts of 1,4-butanediol were 42.71, the parts of terephthalic acid were 30.71, and the parts of tetrakis(2-ethylhexyl) titanate were 0.06.

Embodiment 2

[0042] The parts of sebacic acid were 30.27, the parts of 1,4-butanediol were 42.41, the parts of terephthalic acid were 27.26, and the parts of tetrakis(2-ethylhexyl) titanate were 0.06.

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Abstract

The invention discloses polyester resin and a preparation method thereof. The structure of the polyester resin meets the following relational expression: Sdelta(conjugated carbon chain hydrogen) / Sdelta(saturated carbon chain hydrogen<1.2-2.4>) = 0.1-0.35, wherein Sdelta(conjugated carbon chain hydrogen) is the peak integral total area of hydrogen on a conjugated carbon chain in a 1H NMR spectrogram, and Sdelta(saturated carbon chain hydrogen<1.2-2.4>) is the peak integral total area of hydrogen, with the chemical shift of 1.2-2.4 ppm, on a saturated carbon chain in the 1H NMR spectrogram. Whenthe polyester resin is prepared into a film with the thickness of 25+ / -1 [mu] m, the water vapor transmission rate is 100-1500 g / m<2> / d, and the moisture permeability is good.

Description

[0001] This case is a divisional application with the application number: 201610813867.8 and the title of the invention: a polyester resin and its preparation method. technical field [0002] The invention belongs to the field of polymer synthesis, and in particular relates to a polyester resin and a preparation method thereof. Background technique [0003] Polyester resin is a polymer compound formed by polycondensation of diols or dibasic acids or polyols and polybasic acids. Polyester resins contain flexible aliphatic chains and rigid aromatic chains, so they have high toughness and high temperature resistance. The presence of ester bonds makes it biodegradable at the same time. It is currently one of the most active biodegradable plastics in research and one of the best degradable materials in the market. [0004] However, the polyester resin also has the following defects: when the polyester resin is made into a film material, the moisture permeability of the film mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/183C08G63/58C08G63/52C08G63/85
CPCC08G63/183C08G63/52C08G63/58C08G63/85C08G63/181C08G63/78
Inventor 黄险波蔡彤旻袁志敏曾祥斌郭志龙
Owner ZHUHAI WANTONG CHEM