Method for improving high temperature thermal stability of thermoplastic polymer or its composite by using metal alkyl phosphite

A thermoplastic polymer, alkyl phosphorous acid technology, applied in the field of polymer materials, can solve problems such as easy discoloration

Active Publication Date: 2020-04-21
JIANGSU LISIDE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the defect that the existing commercial organic hindered phenols and organic phosphate anti-oxidation systems are prone to discoloration under high temperature and high shear and multi-auxiliary systems, and provides a method to improve thermoplastic polymer or The method of high-temperature thermal stability of its compound, this method makes the thermoplastic polymer or its compound under the combined action of high temperature and shear force, avoid problems such as cross-linking, decomposition, degradation, discoloration, etc., and maintain the various properties of the material performance

Method used

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  • Method for improving high temperature thermal stability of thermoplastic polymer or its composite by using metal alkyl phosphite
  • Method for improving high temperature thermal stability of thermoplastic polymer or its composite by using metal alkyl phosphite
  • Method for improving high temperature thermal stability of thermoplastic polymer or its composite by using metal alkyl phosphite

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Alkyl phosphite metal salts are used in thermoplastic polymers or their composites, and the thermal stability effect is investigated according to the following steps and test methods.

[0054] 1. Compounding of metal alkyl phosphite and thermoplastic polymer or its compound

[0055] Add the pre-weighed alkyl phosphite metal salt, thermoplastic polymer, and other components into the high-speed mixer, start high-speed stirring, and stir for 10 minutes to complete the mixing of each component and discharge.

[0056] 2. Extrusion and granulation of materials

[0057] Set the temperature of each zone of the twin-screw extruder at the predetermined temperature, and after the temperature stabilizes for 20 minutes, start the main engine and feeder to complete the extrusion and granulation of the material. The granulated material is sent into the silo through the air conveying system and dried.

[0058] 3. Application and testing of materials

[0059] The dried material is in...

Embodiment 2

[0070] The implementation process is the same as in Example 1, except for adjusting the amount of aluminum methyl phosphite, see Table 1 for other materials and proportioning, and see Table 1 for the obtained material results.

Embodiment 3

[0072] The implementation process is the same as in Example 1, except for adjusting the amount of aluminum methyl phosphite, see Table 1 for other materials and proportioning, and see Table 1 for the obtained material results.

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Abstract

The invention discloses a method for improving high-temperature heat stabilization of thermoplastic polymers or composites thereof by alkyl metal phosphite. The method includes adding the alkyl metalphosphite into a raw material, wherein the adding amount of the alkyl metal phosphite accounts for 0.1-2% of the total weight of the thermoplastic polymers or the composites thereof, the structural formula of the alkyl metal phosphite is shown as the following formula (I) or the following formula (II), R is selected from an aryl group or a linear-chain aliphatic alkyl group with the carbon numberof 1-6, and Me is selected from zinc, calcium or magnesium. The method has the advantages that cross-linking, decomposition, degradation, discoloration and other problems of the thermoplastic polymersor the composites thereof are avoided under the joint action of the high temperature and the shearing force, and various properties of the materials are maintained.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a method for improving the high-temperature thermal stability of thermoplastic polymers or their composites by using alkyl phosphorous acid metal salts. Background technique [0002] The molding and processing of thermoplastic polymers need to go through a high temperature process, from a solid state at room temperature to a melt state, and the fluidity of the melt allows thermoplastic polymers to be formed arbitrarily. In the process of experiencing high temperature, polymer molecules may undergo changes such as crosslinking, oxidation, degradation (including polymer decomposition and hydrolysis), resulting in changes in processability, mechanical properties and material color. Therefore, in order to reduce the change of polymer during high temperature processing, different heat stabilizers or antioxidants are used according to different polymers. The main function of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08K13/04C08K5/5393C08K5/5313C08K7/14C08K5/521
CPCC08K5/521C08K5/5313C08K5/5393C08K7/14C08K13/04C08L2201/08C08L2201/22C08L77/06
Inventor 雷华李金忠杨建伟
Owner JIANGSU LISIDE NEW MATERIAL
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