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Phosphite ester antioxidant and preparation method thereof

A technology of phosphite and antioxidant, which is applied in the field of phosphite antioxidant and its preparation, can solve the problems of hydrolysis stability and pyrolysis resistance defects, etc., and achieve easy post-processing and short reaction time , Enhance the effect of hydrolysis resistance

Inactive Publication Date: 2015-09-30
六安科瑞达新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the main varieties of auxiliary antioxidants used in polymer processing on the market are phosphites, such as tris(2,4-di-tert-butylphenyl) phosphite (referred to as antioxidant 168), distearyl Pentaerythritol phosphite (referred to as antioxidant 618), etc., but these antioxidants still have certain defects in their hydrolytic stability and pyrolysis resistance due to structural reasons during use.

Method used

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  • Phosphite ester antioxidant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a 1L four-neck flask equipped with a thermometer, an electric stirrer, a reflux condenser, a gas absorption device, and a gas outlet, under nitrogen protection, add 141.9 g of 2,4-di-tert-butylphenol and 100 mL of toluene, and stir After heating to 45 °C, add 30 mL of phosphorus trichloride and react for 30 min; heat up to 55 °C, add about 0.3 mL of pyridine dissolved in 10 mL of toluene, and react for 90 min; then add 150 mL of toluene and 39.2 g of bisphenol A , heated up to reflux state (about 115 ℃) and reacted until no hydrogen chloride gas was released at the tail gas absorption port (about 90 min), and the reaction ended.

[0023] Distill the reaction solution under normal pressure to remove the solvent. When the system reaches 150 °C and no solvent is removed, distill under reduced pressure at a pressure of about 5 KPa to remove the remaining solvent in the system. The product in the flask is white to light yellow Viscous liquid; pour the product into a...

Embodiment 2

[0025] In a 1L four-neck flask equipped with a thermometer, an electric stirrer, a reflux condenser, a gas absorption device and a gas outlet, under nitrogen protection, add 141.9 g of 2,4-di-tert-butylphenol, diethyldimethyl Diethyl methane 100 mL, stirred and heated to 40°C, then added 30 mL phosphorus trichloride, reacted for 90 min; heated to 55°C, added about 0.3 mL pyridine dissolved in 10 mL diethyldimethylmethane, reacted for 90 min ; Then add 150 mL diethyldimethylmethane and 39.2 g bisphenol A, raise the temperature to reflux state (about 87 ℃) and react until no hydrogen chloride gas is released at the tail gas absorption port (about 90 min), and the reaction ends.

[0026] The follow-up treatment process of the product is the same as Example 1, and finally obtains the 136g white solid powder product. Melting point of the product: 83-85°C.

Embodiment 3

[0028] Test and compare the hydrolysis resistance and pyrolysis performance of commercially available antioxidant 168, antioxidant 618 and the phosphite antioxidant prepared by the present invention according to the following method.

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Abstract

The invention discloses a phosphite ester antioxidant synthesized through a two-step method, wherein the phosphite ester antioxidant can be used for replacing a traditional assistant antioxidant to be used in the field of processing of polymers. A two-step catalytic condensation synthesis preparation process is adopted and has the technical advancements of short reaction time, easy control in reaction and easy post-treatment; the phosphite ester prepared by virtue of the process has the advantages that a spatial structure with very high hydrophobicity is formed by the binding of phosphorus atoms and a bisphenol compound with relatively large steric hindrance, and therefore the hydrolysis resistance of the antioxidant is enhanced; moreover, since multiple benzene rings exist in the molecule, the antioxidant has very high rigidity and is hardly damaged in a high-temperature processing process.

Description

technical field [0001] The invention relates to the technical field of antioxidants, in particular to a phosphite antioxidant and a preparation method thereof. Background technique [0002] When polymer materials are processed or used under high temperature and aerobic conditions for a long time, the material will deteriorate, accompanied by the decrease of physical properties and poor appearance. In order to prevent the deterioration of the material, it is usually necessary to add an antioxidant to the material. Antioxidants are divided into primary antioxidants and auxiliary antioxidants. The main antioxidants are aromatic amine antioxidants and hindered phenolic antioxidants. Auxiliary antioxidants include phosphites and the like. Generally speaking, primary antioxidants and secondary antioxidants have a synergistic effect. [0003] In the application process of polymer materials such as polyolefin, styrene resin, engineering thermoplastic resin and powder coating, it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/145C08K5/526
Inventor 鲍远志柴多里翁世兵
Owner 六安科瑞达新型材料有限公司