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Polymer antioxidant, its preparation method and application

A polymer antioxidant and number-average molecular weight technology, applied in the field of rubber additives, can solve the problems of easy volatilization and migration, and achieve the effects of not easy to change color, simple preparation process, and good volatility resistance.

Active Publication Date: 2015-11-04
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bisphenol monocarboxylate compound prepared in this invention is a small molecular compound, and there are still problems of easy volatilization and migration.

Method used

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  • Polymer antioxidant, its preparation method and application
  • Polymer antioxidant, its preparation method and application
  • Polymer antioxidant, its preparation method and application

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preparation example Construction

[0028] The invention provides a kind of preparation method of macromolecule antioxidant, comprises the following steps:

[0029] The hindered phenol and the chlorinated polyethylene are mixed and stirred according to the mass ratio of (5-50): 100 to obtain the polymer antioxidant.

[0030] In the present invention, hindered phenol and chlorinated polyethylene are used as raw materials. The hindered phenol is preferably 2,6-di-tert-butyl 4-methylphenol, p-tert-butylphenol, β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid n-octadecyl Alcohol esters, 2-methylenebis(4-methyl-6-tert-butylphenol), 2,2-thiobis(4-methyl-6-tert-butylphenol), 2,4-bis( One or more of n-octylthiomethylene)-6-methylphenol and tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol ester. The present invention has no special limitation on the source of hindered phenol, and commercially available products can be used.

[0031] The molecular weight of the chlorinated polyethylene is pre...

Embodiment 1

[0049] Add 2,6-di-tert-butyl 4-methylphenol and chlorinated polyethylene with a number average molecular weight of 100,000 to a 60ml closed mixer in sequence according to the mass ratio of 20:100, and the rotor speed of the mixer is 40r / min, temperature: 80°C, after stirring for 5 minutes, put the mixture into a ball mill to prepare a powder and place it for use.

[0050] Put the polymer antioxidant and styrene-butadiene rubber into the internal mixer according to the mass ratio of 5:100, the internal mixer speed: 40r / min, temperature: 50°C, stir for 5min, and discharge to obtain the polymer antioxidant Complexes with styrene-butadiene rubber.

Embodiment 2

[0057] Add p-tert-butylphenol and chlorinated polyethylene with a number average molecular weight of 120,000 to a 1000ml closed mixer in sequence according to the mass ratio of 5:100, the mixer rotor speed: 20r / min, temperature: 50°C, After stirring for 30 minutes, put the mixed material into a ball mill to prepare a powder and put it aside for use.

[0058] Put the high molecular weight phenolic antioxidant and butadiene rubber into the internal mixer according to the mass ratio of 8:100, the internal mixer speed: 60r / min, temperature: 35 ° C, after stirring for 8 minutes, discharge to obtain the high molecular weight phenol Compounds of antioxidants and butadiene rubber.

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Abstract

The invention provides a macromolecule antioxidant which is compounded by fortified phenol and chlorinated polyethylene in the mass ratio of(5-50): 100. After the fortified phenol and the chlorinated polyethylene are compounded, a great deal of hydrogen bonds exist between the fortified phenol and the chlorinated polyethylene, the interaction between the fortified phenol and the chlorinated polyethylene is enhanced, therefore, the macromolecule antioxidant having better volatility resistance, transport property resistance and thermal stability is obtained. Secondly, according to the invention, the fortified phenol and the chlorinated polyethylene which are low in costs are adopted and mixed to obtain the macromolecule antioxidant, therefore, the preparation technology is simple. In addition, the macromolecule antioxidant is unlikely to form quinonoids and unlikely to change color.

Description

technical field [0001] The invention relates to the field of rubber additives, in particular to polymer antioxidants, their preparation methods and applications. Background technique [0002] During the synthesis, processing, storage and use of rubber, the solution is affected by heat, oxygen, mechanical force, etc., and its structure and performance will change, and its use value will gradually lose. This phenomenon is called aging. Due to the large number of double bonds in the rubber molecular chain, the problem of thermo-oxidative aging is more prominent. In order to inhibit, prevent or delay the occurrence of oxidation reactions, some antioxidants that can delay oxidative aging are usually added. [0003] Antioxidants can eliminate free radicals produced by the breaking of chemical bonds of organic molecules, or promote the decomposition of hydroperoxides produced by breaking chemical bonds of organic molecules, preventing the chain reaction from proceeding. The exist...

Claims

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Application Information

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IPC IPC(8): C08L9/06C08L9/00C08L9/02C08L23/16C08L23/28C08K5/13C08K5/375C08K5/134
Inventor 于琦周张学全白晨曦张春雨那丽华毕吉福代全权张贺新李柏林
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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