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Method for preparing copolyester ether film and its use

A technology of copolyester ether and film, which is applied in the field of preparation of copolyester ether film, and can solve problems such as the inability to improve the softness of copolyester ether, high melting point, and film thickness at breakage

Active Publication Date: 2017-03-29
FAR EASTERN NEW CENTURY COPRRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the material characteristics of too fast crystallization speed in the forward direction are not conducive to the application of stretched film products, because in the process of stretching film formation, too fast crystallization speed will lead to problems of film breakage or uneven film thickness. What is more difficult is It is impossible to manufacture the film thickness required for fabric lamination. The moisture-permeable waterproof membrane commonly used in the general fabric field is usually 20 μm in thickness
Other disclosed technologies include U.S. Patent No. 6380290, which discloses an engineering plastic grade copolyester ether block structure, which is characterized by a melting point higher than 200 ° C. The technology is to add a high concentration of aromatic amine antioxidant ( aromatic amine thermooxidative stabilizer) to increase its oxidation resistance to prolong the weather resistance, but cannot improve the softness of the copolyester ether itself
U.S. Patent No. 7799838 discloses a modified copolyester ether by physical blending, which cannot improve the softness of the copolyester ether itself

Method used

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  • Method for preparing copolyester ether film and its use
  • Method for preparing copolyester ether film and its use
  • Method for preparing copolyester ether film and its use

Examples

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preparation example Construction

[0032] In the preparation method of the present invention, a catalyst can be added to increase the reaction rate. In one embodiment, a transesterification catalyst is added to the transesterification reaction, wherein the transesterification catalyst is a titanium compound, a tin compound, an antimony compound, a monovalent metal compound, a divalent metal compound or any combination thereof. In another embodiment, a polymerization catalyst is added in the polymerization reaction, wherein the polymerization catalyst is an antimony compound, a germanium compound, a magnesium compound, a manganese compound, a phosphorus compound, a nitrogen compound, an organic peroxide or any combination thereof.

[0033] The preparation method of the present invention can add auxiliary additives with special functions to improve other required properties of the material. In this embodiment, an antioxidant is added to improve the thermal stability of the material, and an ultraviolet absorber is...

Embodiment 1

[0057] The preparation method of embodiment 1 is as follows:

[0058] 1. Take 20kg of recycled PET and 23.44kg of 1,4-butanediol for alcoholysis reaction, using 50kg of reaction equipment, the first stage of alcoholysis temperature is 190 ℃ ~ 200 ℃, alcoholysis time is 5 hours.

[0059] 2. Continue to heat up to 230°C and add an appropriate amount of transesterification catalyst tetrabutyltitanium to carry out transesterification reaction, and the ethoxy group of PET (C 2 h 4 O) segment molecular part introduces butoxy group (C 4 h 6 O). The transesterification temperature should be controlled below 230°C to avoid cleavage of 1,4-butanediol to form THF due to high reaction temperature.

[0060] 3. When the degree of transesterification reaches more than 95%, the excess 1,4-butanediol is vacuum-extracted and moved to the polymerization tank for polymerization reaction. After there is no distillate, add 4kg polyethylene glycol (molecular weight is 1000), add polymerization ...

Embodiment 2～4

[0063] The preparation method of Examples 2-4 is roughly the same as that of Example 1, except that the operating conditions of polyethylene glycol are changed to add 6 kg and 10 kg of polyethylene glycol with a molecular weight of 1000 and 14 kg of polyethylene glycol with a molecular weight of 2000.

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Abstract

The present invention provides a copolyester ether film preparation method, which comprises: providing a recovered polyester; adding diol to carry out an alcoholysis reaction with the recovered polyester so as to prepare a first intermediate product, wherein a mole ratio of the recovered polyester to the diol is 1:1.8-2.5; carrying out an ester exchange reaction on the first intermediate product so as to prepare a second intermediate product, wherein the ester exchange reaction temperature is 190-230 DEG C; adding poly diol to carry out a polymerization reaction with the second intermediate product so as to prepare the copolyester ether, wherein the copolyester ether contains 24-55% by weight of the poly diol component; and preparing the copolyester ether into the elastomeric film. According to the present invention, the film prepared according to the method is the elastomeric, waterproof and moisture permeability film, wherein the Young's modulus is 60-210 MPa, and the moisture permeability is 600-6000 g / m<2> / day.

Description

technical field [0001] The present invention relates to a method for preparing copolyester ether film, in particular to a method for preparing thermoplastic copolyester ether film from recycled polyester. Background technique [0002] The basic molecular structure of thermoplastic copolyester ether has a hard segment structure capable of forming a crystalline region and a soft segment structure capable of maintaining its elasticity and softness. When the hard segments are neatly arranged and aggregated, a crystalline region can be produced. According to the composition of the hard segment and the soft segment, the content of the soft and hard segments can be adjusted to produce a thermoplastic copolyester ether with a wide range of physical properties. Elastomer (Thermoplastic Polyester Elastomer, TPEE), so the molecular composition and structure of soft and hard segments, the number and size of monomers, and the proportion distribution of soft and hard segments to the total...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/672C08G63/78C08L67/02
Inventor 欧福文郭若斌
Owner FAR EASTERN NEW CENTURY COPRRATION