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Uses of tea polysaccharide extract-dihydromyricetin and its esterified matter as anti-oxidant in superpolymer

A technology of dihydromyricetin and ester compound is applied in the field of materials to achieve the effects of good thermal stability and obvious anti-oxidation effect

Inactive Publication Date: 2009-02-18
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the use of this compound and its derivatives as antioxidants in polymers at home and abroad so far.

Method used

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  • Uses of tea polysaccharide extract-dihydromyricetin and its esterified matter as anti-oxidant in superpolymer
  • Uses of tea polysaccharide extract-dihydromyricetin and its esterified matter as anti-oxidant in superpolymer
  • Uses of tea polysaccharide extract-dihydromyricetin and its esterified matter as anti-oxidant in superpolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] After the polypropylene resin and dihydromyricetin are fully mixed according to the ratio in Table 1, they are rolled in an open plastic refining machine for 3 minutes, and the temperature of the double rollers is 180±5°C to make a 2mm sample.

[0017] The oxidation induction temperature of the sample was measured using a differential scanning calorimeter (DSC). The oxidation induction test was carried out in an oxygen atmosphere with a flow rate of 20 mL / min. Keep the temperature at 50°C for 2 minutes; raise the temperature at a rate of 10°C / min, when the polypropylene starts to degrade rapidly, the heat flow will change significantly, and the temperature at this time is the oxidation induction temperature.

[0018] Table 1 Oxidation induction temperature (℃) of polypropylene with different proportions of dihydromyricetin added

[0019]

[0020] It can be seen from Table 1 that dihydromyricetin has a good antioxidant effect on polypropylene.

Embodiment 2

[0022] Fully mix the linear low density polyethylene and the antioxidant according to the ratio in Table 2, roll in the open plastic refining machine for 3 minutes, and the temperature of the double rolls is 120±5°C, and make a 2mm sample.

[0023] Oxidation induction temperature test conditions are the same as above.

[0024] Table 2 Oxidation induction temperature of linear low density polyethylene (℃)

[0025]

[0026] It can be seen that the antioxidant effect of dihydromyricetin on linear low density polyethylene is much better than that of composite antioxidant B215.

Embodiment 3

[0028] Fully mix high-density polyethylene and antioxidant according to the ratio in Table 3, and roll in an open plastic refining machine for 3 minutes, and the temperature of the double rolls is 130±5°C to make a 2mm sample.

[0029] Oxidation induction temperature test conditions are the same as above.

[0030] Table 3 Oxidation induction temperature of HDPE (℃)

[0031]

[0032] It can be seen from Table 3 that the antioxidant effect of dihydromyricetin on high-density polyethylene is better than that of compound antioxidant B215.

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Abstract

The invention discloses an application of dihydromyricetin and the esterified product serving as antioxidant in high polymer, and the dosage is only 0.01-10.00 percent of the quantity of high polymer. The extract and the esterified product have sound heat stability, little toxicity, and have remarkable anti-oxidation action to various high-polymer materials, and can be extensively used as the antioxidant of various natural and synthesized high polymers.

Description

technical field [0001] The invention relates to the field of materials, in particular to the application of vine tea extract dihydromyricetin and its esterified product as an antioxidant in polymers. Background technique [0002] For a long time, people have used synthetic antioxidants to preserve freshness and prevent oxidation. With the improvement of people's quality of life, newer and higher requirements have been put forward for hygiene, safety and environmental protection. In recent years, it has been advocated to use some non-toxic natural antioxidants as much as possible. At present, a large number of natural antioxidant products have been developed from herbs, spices, tea, oil seeds, fruits and vegetables, enzymes and protein hydrolyzates at home and abroad, but most of the natural antioxidants have poor thermal stability, and their applications are limited to food and medicine. And health products, not suitable for polymer synthesis industry. [0003] Vine tea is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/1545C08L9/00C08L9/06C08L23/06C08L23/12C08L25/06C08L23/08C08L25/10C08L55/02C08L53/02
Inventor 陈鸣才郑秋闿陈德宏刘飞跃许凯
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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