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A kind of preparation method of rapid crystallization polyester and hot-fill polyester bottle flakes thereof

A technology for crystalline polyester and polyester bottle flakes, which is applied in the field of polyester, can solve the problems of long production cycle, high cost, and inventory occupation, and achieve the effects of fast crystallization rate, hot filling, and good water absorption

Active Publication Date: 2021-12-07
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this production process are: long production cycle, occupying a certain amount of inventory, and high cost

Method used

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  • A kind of preparation method of rapid crystallization polyester and hot-fill polyester bottle flakes thereof
  • A kind of preparation method of rapid crystallization polyester and hot-fill polyester bottle flakes thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: Adopt 300L polymerization reaction device, add terephthalic acid 150Kg, ethylene glycol 78Kg, kaolin 8.675g, add ethylene glycol antimony catalyst 200 μ g / g, ether inhibitor again, through esterification (temperature: 220 ℃~ 260℃; pressure: 0.2MPa~0.3MPa), polycondensation reaction (temperature: 275℃~285℃), when the stirring current reaches the predetermined target, the melt (theoretical output: 173.49Kg) is cooled and granulated to obtain polyester base Slicing, the basic slices are subjected to solid-state polymerization (temperature: 200°C to 220°C) to obtain hot-fill bottle slices. Conventional quality indicators: intrinsic viscosity is 0.720dL / g, carboxyl end is 32mol / t, and diethylene glycol is 1.4%.

Embodiment 2

[0017] Example 2: Using a 300L polymerization reaction device, add 150Kg of terephthalic acid, 62Kg of ethylene glycol, 0.867Kg of isophthalic acid, 86.75g of kaolin, and then add 3 μg / g of titanate polymerization catalyst and ether inhibitor. Chemicalization (temperature: 220℃~260℃; pressure: 0.2MPa~0.3MPa), polycondensation reaction (temperature: 275℃~285℃), when the stirring current reaches the predetermined target, the melt (theoretical output: 173.49Kg) is cooled 1. Granulation to obtain polyester basic slices, and the basic slices undergo solid phase polymerization (temperature: 200°C-220°C) to obtain hot-fill bottle flakes. Conventional quality index: intrinsic viscosity is 0.820dL / g, carboxyl end is 32mol / t, diethylene glycol is 1.4%.

Embodiment 3

[0018] Example 3: Using a 300L polymerization reaction device, add 150Kg of terephthalic acid, 78Kg of ethylene glycol, 0.450Kg of isophthalic acid, 44.20g of kaolin, and then add 6 μg / g of titanate polymerization catalyst and ether inhibitor. Chemicalization (temperature: 220℃~260℃; pressure: 0.2MPa~0.3MPa), polycondensation reaction (temperature: 275℃~285℃), when the stirring current reaches the predetermined target, the melt (theoretical output: 173.49Kg) is cooled 1. Granulation to obtain polyester basic slices, and the basic slices undergo solid phase polymerization (temperature: 200°C-220°C) to obtain hot-fill bottle flakes. Conventional quality indicators: intrinsic viscosity is 0.730dL / g, carboxyl-terminated group is 32mol / t, and diethylene glycol is 1.3%.

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Abstract

The invention provides a method for preparing rapid crystallization polyester and its hot-filling polyester bottle flakes. Using terephthalic acid and ethylene glycol as raw materials, polyester basic slices are prepared through esterification and polycondensation reactions, and the raw materials are added Isophthalic acid with a weight percentage of 0-0.5% of polyester and kaolin with a weight percentage of polyester of 0.005-0.05%, and the basic slices undergo solid-state polymerization to obtain hot-fill polyester bottle flakes with an intrinsic viscosity of 0.72-0.82dL / g. The polyester prepared by the method of the invention and the preform produced by hot-filling the polyester bottle flakes can realize crystallization at the mouth of the bottle without placing, and meet the requirements of hot-filling. Moreover, the preform has good water absorption and fast crystallization rate, which can save the production process of using long-term storage to realize water absorption.

Description

technical field [0001] The invention relates to a polyester, in particular to a fast crystallization polyester. Background technique [0002] Fruit juices and tea beverages on the market are usually filled by hot filling or aseptic filling. Some hot-filled beverages need to be highly crystallized at the bottle mouth during the production process to avoid high-temperature deformation of the bottle mouth during filling. The raw material for producing hot-fill bottles is mainly PET copolyester modified by adding a small amount of isophthalic acid. The hot-fill bottles produced by this PET copolyester have the advantages of high transparency and good heat resistance after heat setting . However, when this copolyester is used to produce hot-fill bottles, it cannot be produced continuously, mainly because the crystallization speed of the newly injected preform bottle mouth is slow and cannot reach the required crystallinity of the bottle mouth. The usual practice is to place the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/183C08G63/85C08G63/86C08K3/34
CPCC08G63/183C08G63/85C08G63/866C08K3/346
Inventor 褚荣林罗安广周刚王震辉芦杰陈锦国夏峰伟陆爱军
Owner CHINA PETROLEUM & CHEM CORP