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Oxygen absorbent for polyester packaging material and preparation method thereof

A technology of packaging materials and oxygen absorbers, which is applied in transportation and packaging, chemical instruments and methods, and other chemical processes, can solve problems such as uneven distribution, low solubility, and poor compatibility, so as to improve catalytic efficiency and reduce usage Quantity, good compatibility

Active Publication Date: 2011-05-18
CHINA RESOURCES PACKAGING MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The presence of water will reduce the activity of such oxygen scavenger compositions, so materials containing such compositions can only be used for packaging of dry materials
[0007] Existing multi-layer container technology has the following disadvantages: First, because the properties of the core layer and the inner and outer layer materials are not similar, it is usually necessary to separate the barrier (nylon or ethylene-ethanol copolymer resin) from the main part of the recycled stream. Less complete separation and therefore not easily regenerated
[0012] However, the current PET materials for single-layer bottles also have some obvious defects: first, polyolefins have low polarity, low solubility in terephthalic acid-ethylene glycol system, poor compatibility, and are not easy to distribute evenly. Thereby affecting the oxygen absorption effect; Second, the transition metal catalysts usually used are added to the organic monomers in the form of small molecular inorganic salts, which also have the problems of poor compatibility and uneven distribution, and the dosage Larger, the catalytic efficiency is not high, and the metal ions are easy to migrate, and the excessive metal ion content will make the color value of the polymer higher

Method used

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  • Oxygen absorbent for polyester packaging material and preparation method thereof
  • Oxygen absorbent for polyester packaging material and preparation method thereof
  • Oxygen absorbent for polyester packaging material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0033] Example 1, a kind of preparation method of oxygen-absorbing agent for polyester packaging material, its steps are as follows:

[0034] (1) Add 500g of butadiene monomer to neutralize 5g of dibenzoyl peroxide in a 1-liter three-neck flask, stir mechanically, slowly rise to 80°C over 30 minutes and keep it warm to allow it to undergo polymerization for 60 minutes; After the reaction finishes, the unreacted butadiene is separated and recovered through flash evaporation and compression, and the polymer-containing feed liquid is left to stand at 40° C. for 10 hours, then washed 3 times with an aqueous solution of sodium hydroxide with a concentration of 15% by weight, and then Wash 2 times with deionized water; then dry the feed liquid in a fluidized bed drier to obtain 450g of polybutadiene liquid polymer, the temperature is 120°C, and the drying time is 10 hours; the yield reaches 90%, 1, 2 The polymerized structural units account for about 10% of the total polymerized uni...

example 2

[0038] Example 2: Use Sidel Model 1047, SBOZ / 3 equipment is blow-molded into a plurality of 500ml beer bottle molds by the mass ratio of 1: 20 with the polyester packaging material prepared in example 1 with oxygen absorbent and PET bottle flakes; A brass plate equipped with a rubber septum bonded to the top of the bottle seals the test bottle; 10 mL of water is added to the bottle, the bottle is purged with a 2% oxygen / 98% nitrogen mixture, and after 30 hours the test is performed by drawing 2 mL of gas from the bottle Sample, using MOCON HS750 oxygen analyzer to analyze its oxygen content was 1.34%.

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Abstract

The invention relates to an oxygen absorbent for a polyester packaging material, which takes I as a general structural formula. In the formula, x, y, and z are between 5 and 40; and M<+> is Cu<2+>, Co<2+>, Ni<2+>, Mn<2+>, Fe<2+>, Cr<3+> or Zn<2+>. The invention also relates to a method for preparing the oxygen absorbent for the polyester packaging material. The oxygen absorbent has the advantages that the oxygen absorbent has good compatibility and even distribution in the polyester packaging material, reduces the using amount of transition metal ions in the polyester packaging material, and ensures that the transition metal ions have evener distribution and better stability and are not easy to migrate in the polyester packaging material.

Description

1. Technical field [0001] The invention relates to an oxygen absorber, in particular to an oxygen absorber for polyester packaging materials and a preparation method thereof. 2. Background technology [0002] Polyester materials are often used to produce beverage or wine packaging bottles. These bottles are inevitably exposed to air during use or transportation. It must be ensured that the oxygen outside the bottle cannot easily penetrate into the bottle to prevent it from being damaged by oxygen. The next drink spoils. However, the polyester material itself is not very good at isolating oxygen, and it is inevitable that a small amount of oxygen will invade the bottle body. It is necessary to use an oxygen absorber added to the material to prevent and delay oxygen from entering the drink through the bottle body. the process of. [0003] At present, substances with definite oxygen absorption function are mainly divided into two categories: organic matter and inorganic matte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/42C08F8/46C08F136/06B65D81/26C08L67/00B01J20/26
Inventor 朱振达宗建平傅伟铮陈小雷陈旭徐梅陈群何明阳崔爱军
Owner CHINA RESOURCES PACKAGING MATERIALS CO LTD