Method for improving high-temperature heat stabilization of thermoplastic polymers or composites thereof by inorganic metal phosphite

A thermoplastic polymer, stabilization method technology, applied in the field of polymer materials, can solve problems such as easy discoloration
CN109082115AInactive Publication Date: 2018-12-25JIANGSU LISIDE NEW MATERIAL +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU LISIDE NEW MATERIAL
Publication Date
2018-12-25
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a method for improving high-temperature heat stabilization of thermoplastic polymers or composites thereof by inorganic metal phosphite. The method includes adding the inorganic metal phosphite into a raw material, wherein the inorganic metal phosphite is selected from at least one of aluminum phosphite, zinc phosphite, calcium phosphite and magnesium phosphite, and the adding amount of the inorganic metal phosphite accounts for 0.1-2% of the total weight of the thermoplastic polymers or the composites thereof. The method has the advantages that cross-linking, decomposition, degradation, discoloration and other problems of the thermoplastic polymers or 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.
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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 inorganic 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...

Claims

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