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Liquid phosphite used as antioxidant and mixture thereof

A liquid phosphite, phosphite technology, applied in the field of phosphite antioxidants and their mixtures, can solve environmental hazards, health hazards, not recommended and other issues

Pending Publication Date: 2022-05-10
范长亮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, trinonylphenyl phosphite is not recommended to be used in the oxidation protection of polymers because it contains nonylbenzene and is easily hydrolyzed to release nonylphenol, which may cause possible health hazards and environmental hazards.

Method used

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  • Liquid phosphite used as antioxidant and mixture thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Synthesis of phosphorous acid from 2,4-dimethyl-6-tert-butylphenol, 2,5-di-tert-butylphenol, styrenated phenol, and 3,5-di-tert-butyl-4-hydroxyphenylpropionate ester mixture

[0020] Add 137.35 grams of phosphorus trichloride (1 mole) into a flask with an oil bath and a condensation reflux device, and slowly add 138.7 grams of 2,4-dimethyl-6-tert-butylphenol dropwise after heating to boiling under nitrogen protection (0.75 moles), 153.75 grams of 2,5-di-tert-butylphenol (0.75 moles), 226.5 grams of styrenated phenol (0.75 moles) and 292.95 grams of 3,5-di-tert-butyl-4-hydroxyphenylpropionate base ester (0.75 mol), the temperature was raised to 100-160 degrees until no hydrogen chloride escaped, and then the pressure was reduced for vacuum distillation to obtain a phosphite mixture.

Embodiment 2

[0022] 2,6-di-tert-butyl-p-cresol, 2,4-di-tert-butylphenol, 2,4-bis(n-octylthiomethylene)-6-methylphenol, 3,5-di-tert-butyl Phosphite mixture synthesized from isotridecyl-4-hydroxyphenylpropionate

[0023] 137.35 grams of phosphorus trichloride (1 mole) was added in the flask with oil bath and condensation reflux device, slowly added dropwise 220.36 grams of 2,6-di-tert-butyl p-cresol (1 mole) after heating to boiling under nitrogen protection ), 153.75 grams of 2,4-di-tert-butylphenol (0.75 moles), 318.5 grams of 2,4-bis(n-octylthiomethylene)-6-methylphenol (0.75 moles) and 230 grams of 3,5 -Di-tert-butyl-4-hydroxyphenylpropionate isotridecyl ester (0.5 mol), the temperature is raised to 100-160 degrees until no hydrogen chloride escapes, and the pressure is reduced for vacuum distillation to obtain a phosphite mixture.

Embodiment 3

[0025] 2,4-di-tert-butylphenol, 2,4-dimethyl-6-tert-butylphenol, 2,4-dimethyl-6-(2-methyl)hexadecylphenol, styrenated phenol Synthetic Phosphite Mixture

[0026] Add 137.35 grams of phosphorus trichloride (1 mole) into a flask with an oil bath and a condensation reflux device, and slowly add 138.7 grams of 2,4-dimethyl-6-tert-butylphenol dropwise after heating to boiling under nitrogen protection (0.75 moles), 153.75 grams of 2,4-di-tert-butylphenol (0.75 moles), 226.5 grams of styrenated phenol (0.75 moles), and 259.9 grams of 2,4-dimethyl-6-(2-methyl) Hexadecylphenol (0.75 mol), the temperature was raised to 100-160 degrees until no hydrogen chloride escaped, and then the pressure was reduced for vacuum distillation to obtain a phosphite mixture.

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Abstract

The invention discloses liquid phosphite used as an antioxidant and a mixture of the liquid phosphite. The liquid phosphite comprises phosphite with a structural formula of (R1O) (R2O) (R3O) P or a blend of the phosphite. Wherein R1, R2 and R3 are independently selected alkylated aryl, ester aryl, thioether aryl, styrenated aryl, ether aryl, ketone aryl, alkoxy aryl and olefin aryl, and at most two of R1, R2 and R3 are alkylated aryl.

Description

technical field [0001] The invention relates to a phosphite antioxidant and a mixture thereof for polymer antioxidation. Background technique [0002] Phosphite compounds have become widely used secondary antioxidants for polymers because of their efficient ability to decompose peroxides. Among them, tris(2,4-di-tert-butylphenyl) phosphite and trinonylphenyl phosphite are the most widely used secondary antioxidants. Tris(2,4-di-tert-butylphenyl)phosphite has a relatively high melting point and can only be used in polymers with relatively high processing temperatures such as polyolefins and polyamides. In certain thermoplastic elastomer and rubber applications, liquid antioxidants are preferred because of lower processing temperatures. As a liquid auxiliary antioxidant, trinonylphenyl phosphite has been used in the oxidation protection of styrene-butadiene rubber for a long time. However, trinonylphenyl phosphite is not recommended to be used in the oxidation protection of...

Claims

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Application Information

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IPC IPC(8): C08K5/526
CPCC08K5/526C08K2201/014
Inventor 范长亮张金国
Owner 范长亮
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