Preparation method of high barrier light-proof, preservative and environment-friendly polyester material

A kind of polyester material, environment-friendly technology, applied in the field of polyester material preparation, can solve the problems of damage delamination, poor dispersion of MMT, poor barrier property, etc., and achieve the effect of improving melt strength, good dispersion and promoting dispersion

Inactive Publication Date: 2010-09-15
JIANGSU XINGYE PLASTIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the defect that exists at present is that the existing PET/MMT nanocomposite materials only use conventional organic methods to modify montmorillonite, and the prepared PET/MMT nanocomposite materials are intercalation type, and MMT is not completely peeled off. The dispersion in the matrix is ​​poor, and the PET/MMT nano-bottles made after injection molding and blowing processing have poor barrier properties and transparency, which hinders the application of PET/MMT nanocomposites in the field of high barrier materials
[0012] Analysis of the above main reasons is that the dispersion of montmorillonite in the PET matrix is ​​poor, agglomeration occurs, the sheets cannot be uniformly dispersed and arranged

Method used

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  • Preparation method of high barrier light-proof, preservative and environment-friendly polyester material
  • Preparation method of high barrier light-proof, preservative and environment-friendly polyester material

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preparation example Construction

[0042] The invention relates to a method for preparing a high-barrier, light-proof, fresh-keeping and environment-friendly polyester material. The method includes the following process:

[0043] Step 1. Pre-modification of montmorillonite to obtain organic montmorillonite loaded with main titanium catalyst

[0044] This step mainly includes two main processes of organic modification and supporting the main titanium-based catalyst with stable reactivity, and the preparation process is as follows:

[0045] a) Add 10 parts by weight of montmorillonite (Zhangjiakou Qinghe Chemical Plant) with a cation exchange capacity of 100meq / 100g to 100 parts by weight of ethylene glycol, and stir at room temperature to obtain an ethylene glycol solution of montmorillonite.

[0046] b) Stir 1 part by weight of the catalyst in 100 parts by weight of ethylene glycol at 60°C for 12 hours, then add it into the ethylene glycol solution of montmorillonite obtained in step 1, stir for 3 hours and the...

Embodiment 1

[0063] The invention relates to a method for preparing a high-barrier, light-proof, fresh-keeping and environment-friendly polyester material. The method includes the following process:

[0064] Step 1. Pre-modification of montmorillonite to obtain organic montmorillonite loaded with main titanium catalyst

[0065] This step mainly includes two main processes of organic modification and supporting the main titanium-based catalyst with stable reactivity, and the preparation process is as follows:

[0066] a) Montmorillonite with a cation exchange capacity of 50meq / 100g (Zhangjiakou Qinghe Chemical Plant)

[0067] Add 0.3 parts by weight to 30 parts by weight of ethylene glycol, and stir at room temperature to obtain an ethylene glycol solution of montmorillonite.

[0068] b) Stir 0.005 parts by weight of the catalyst in 3 parts by weight of ethylene glycol at 30°C for 12 hours, then add it to the ethylene glycol solution of montmorillonite obtained in step 1, stir for 0.3 hour...

Embodiment 2

[0079] The invention relates to a method for preparing a high-barrier, light-proof, fresh-keeping and environment-friendly polyester material. The method includes the following process:

[0080] Step 1, organic modification of montmorillonite to obtain organic montmorillonite loaded with main titanium series catalyst

[0081] This step mainly includes organic modification and loading of main titanium-based catalyst with stable reaction activity.

[0082] The main process is as follows:

[0083] a) Add 10 parts by weight of montmorillonite (Zhangjiakou Qinghe Chemical Plant) with a cation exchange capacity of 100meq / 100g to 100 parts by weight of ethylene glycol, and stir at room temperature to obtain an ethylene glycol solution of montmorillonite.

[0084] b) Stir 1 part by weight of the catalyst in 100 parts by weight of ethylene glycol at 60°C for 18 hours, then add it into the ethylene glycol solution of montmorillonite obtained in a), stir for 3 hours and then use a centr...

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Abstract

The invention relates to a preparation method of high barrier light-proof, preservative and environment-friendly polyester material. The method comprises the following technical processes: 1) performing preliminary modification of montmorillonite to obtain organized montmorillonite loaded with main titanic type catalyst; 2) selecting proper branching agent; 3) performing esterification; 4) performing polycondensation, wherein firstly the expanded montmorillonite loaded with titanium and stable other metal composite catalyst and branching agent are separately dissolved in ethanediol to obtain additives, the additives are injected through an additive nozzle, polyphosphoric acid is injected through another nozzle, the dosage is subject to the content in polyester, a gear pump is used to inject the esterified oligopolymer along with the above additives in the pipeline in a prepolymerizer; the prepolymerizer is an upflow bubble tower; and when reaching the top of the prepolymerizer, the material flows to a final polycondensation autoclave, and the product is filtered by a melt filter and then pulled to a pelleter to prepare polyester slices; and 5) tackifying solid phase. The method of the invention can provide the high barrier light-proof, preservative and environment-friendly polyester material.

Description

(1) Technical field [0001] The invention relates to a preparation method of polyester material. It is mainly used in the packaging of PET beer bottles. It can also be used as a packaging material for other soft drinks, tea drinks, fruit juices, medicines, food and other packaging containers. It belongs to the application technical field of packaging materials and engineering plastics. (2) Background technology [0002] Polyethylene terephthalate (PET) is the most important polyester at present. It has high heat resistance, good chemical resistance and insulation, and is widely used in fibers, biaxially stretched films And polyester bottles and various packaging containers. In today's engineering plastics market, PET has a tendency to replace PBT due to its excellent cost performance. In the field of packaging materials, especially in the field of bottle packaging materials, PET is developing rapidly. In 1973, the industrialization of the patented technology of biaxially...

Claims

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Application Information

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IPC IPC(8): C08G63/20C08G63/85C08G63/83C08G63/80C08K9/04C08K3/34
Inventor 顾晓华李春成薛纪良殷明承耀明卞忠华卞敏凯赵飞
Owner JIANGSU XINGYE PLASTIC
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