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Polyolefin containing hindered phenol phosphonium salt modified montmorillonite antioxidant as well as preparation method of polyolefin

A technology of montmorillonite and quaternary phosphonium salt, applied in the field of polyolefin and its preparation, can solve the problems of short action time, poor stability, limited use and the like, and achieve the effects of less pollution, good processing resistance, and not easy to migrate

Active Publication Date: 2015-05-06
GUIZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among the traditional antioxidants, some are highly toxic due to poor stability; some are easy to migrate and have a short action time, so their use is greatly restricted

Method used

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  • Polyolefin containing hindered phenol phosphonium salt modified montmorillonite antioxidant as well as preparation method of polyolefin
  • Polyolefin containing hindered phenol phosphonium salt modified montmorillonite antioxidant as well as preparation method of polyolefin
  • Polyolefin containing hindered phenol phosphonium salt modified montmorillonite antioxidant as well as preparation method of polyolefin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Synthesis of benzyl chloride hindered phenol: in N 2 Under protection, add 10 parts of 2,6 di-tert-butylphenol (Zibo Shibang Chemical Co., Ltd.), 20 parts of paraformaldehyde, and 5 parts of n-heptane into a 250 mL three-necked flask equipped with magnetic stirring, condenser and thermometer , 0.01 part of initiator, the temperature was raised to 70°C, and the 2,6 phenol was completely dissolved under magnetic stirring. Add 3 parts of concentrated hydrochloric acid dropwise to the above solution, continue the constant temperature reaction at 70°C for 12 hours, then cool the reaction solution to room temperature, separate the liquids, extract the water phase with 20 parts of ethyl acetate and mix it with the organic layer, and wash the organic layer with deionized water until neutral. properties, washed with saturated brine, anhydrous Na 2 SO 4 After drying, the solvent was recovered by distillation under reduced pressure, and vacuum-dried at 30°C for 12 hours to o...

Embodiment 2

[0038] The difference between this implementation and Example 1 is that in step (1), the reaction temperature is changed to 80°C, the reaction time is 18h, the solvent is changed to n-hexane, the dosage is 17.5 parts, the initiator is 0.3 parts, paraformaldehyde 50 parts, hydrochloric acid 0.5 parts, 50 parts of ethyl acetate. In step (2), the temperature is 50°C, the reaction time is 3 hours, the organic phosphine is 12 parts, the solvent is changed to N,N dimethylformamide, the dosage is 10 parts, and petroleum ether is 50 parts. In step (3), the water bath temperature is 70°C, the reaction time is 24 hours, the solvent is changed to 500 mL of anhydrous methanol, and the hindered phenolic quaternary phosphonium salt is 4.5 parts. In step (4), the added amount of the hindered phenolic quaternary phosphonium salt modified montmorillonite antioxidant is reduced to 0.3 parts.

[0039] The thermal and oxidative aging properties are shown in Table 1. It can be seen from Table 1 ...

Embodiment 3

[0041] The difference between this implementation and Example 1 is that the reaction temperature in step (1) is changed to 90°C, the reaction time is 24h, the solvent is changed to 25 parts of toluene, 0.1 parts of initiator, 100 parts of paraformaldehyde, 1.5 parts of hydrochloric acid, acetic acid 30 parts of ethyl ester. In step (2), the temperature is 60° C., the reaction time is 4 hours, the solvent is changed to tetrahydrofuran, 30 parts of petroleum ether, and 11 parts of organic phosphine. In step (3), the temperature of the water bath is 80° C., the reaction time is 12 hours, 450 mL of deionized water, and 5.5 parts of hindered phenolic quaternary phosphonium salts. In step (4), the added amount of hindered phenolic quaternary phosphonium salt modified montmorillonite antioxidant is reduced to 0.1 part.

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Abstract

The invention discloses polyolefin containing a hindered phenol phosphonium salt modified montmorillonite antioxidant as well as a preparation method of polyolefin. The polyolefin is characterized by being prepared by the following steps: adding the hindered phenol phosphonium salt modified montmorillonite antioxidant into polyolefin, wherein 0.1-0.5 part of hindered phenol phosphonium salt modified montmorillonite antioxidant is added into every 100 parts of polyolefin; and uniformly mixing by virtue of a twin-screw extruder to prepare the modified polyolefin. The hindered phenol phosphonium salt modified montmorillonite antioxidant disclosed by the invention contains phosphonium salt and hindered phenol groups having good compatibility with polyolefin, so that the interface bonding performance of montmorillonite and polyolefin is improved, and moreover, polyolefin is hardly volatilized and good in migration resistance. The molecules of the hindered phenol phosphonium salt modified montmorillonite antioxidant disclosed by the invention not only contain hindered phenol antioxidant groups, but also contain phosphonium salt groups, and the antioxidant further has an efficient antioxidant performance and is excellent in thermal oxidative aging resistance to polyolefin and high in efficiency.

Description

technical field [0001] The invention relates to a polyolefin containing a hindered phenol quaternary phosphonium salt modified montmorillonite antioxidant and a preparation method thereof. The invention also relates to a preparation method of hindered phenolic quaternary phosphonium salt modified montmorillonite. Background technique [0002] During storage, processing, and use, polyolefins are subjected to heat, oxygen, light, etc., which will change the structure and properties of polyolefins, gradually lose their use value, and reduce their service life. This phenomenon is called aging of polyolefins. . In particular, the methyl branch in polyolefin is easily attacked by free radicals, and combines with oxygen to form peroxy radicals, and the problem of thermo-oxidative aging is more prominent. In order to inhibit the aging of polyolefins, maintain material properties, and prolong service life, the most common and effective method is to add antioxidants to them. Antiox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/06C08L25/06C08K9/04C08K3/34
CPCC08K3/346C08K9/04C08L2201/08C08L23/14C08L23/06C08L25/06
Inventor 龚维尹晓刚陈卓吴伟付海王潇梦
Owner GUIZHOU NORMAL UNIVERSITY
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