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Modified hydroxyapatite-based compound thermal stabilizer for PVC

A composite heat stabilizer and hydroxyapatite technology, which is applied in the field of material processing aids, can solve problems such as easy precipitation, and achieve the effects of improving dispersibility, improving performance, and good thermal stability

Pending Publication Date: 2018-03-09
SHAOYANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of unmodified zinc-containing hydroxyapatite in the PVC composite heat fixer should not exceed 50%, otherwise it is easy to precipitate

Method used

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  • Modified hydroxyapatite-based compound thermal stabilizer for PVC

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The composite thermal stabilizer of this embodiment contains the following components by mass fraction: modified hydroxyapatite: 70%, zinc stearate: 15%, 1,3-dimethyl-6-aminouracil: 5% , Antioxidant 1010: 2%, polyethylene wax: 8%.

Embodiment 2

[0022] The composite heat stabilizer of this embodiment contains the following components by mass fraction: modified hydroxyapatite: 60%, zinc stearate: 20%, 1,3-dimethyl-6-aminouracil: 5% , antioxidant 1010: 3%, paraffin wax: 12%.

Embodiment 3

[0024] The composite heat stabilizer of this embodiment contains the following components by mass fraction: modified hydroxyapatite: 80%, zinc stearate: 10%, 1,3-dimethyl-6-aminouracil: 4% , Antioxidant 689: 1%, polyethylene wax: 5%.

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Abstract

The invention relates to a modified hydroxyapatite-based compound thermal stabilizer for PVC. The compound thermal stabilizer comprises the following components in percentage by mass: 60-80% of modified hydroxyapatite, 10-20% of zinc stearate, 3-5% of 1,3-dimethyl-6-aminouracil, 1-3% of an antioxidant and 5-12% of a lubricant. According to the technical scheme, by taking the hydroxyapatite modified by polyethylene glycol and calcium stearate in a compounded manner as a primary component of the PVC compound thermal stabilizer, the stabilizer not only has a good thermal stable performance on PVC, but also has excellent compatibility with PVC. The components of the compound thermal stabilizer have a good synergistic effect, can improve the thermal stability of PVC remarkably, and have the advantages of being non-toxic, environment-friendly and relatively low in cost.

Description

technical field [0001] The invention relates to a PVC heat stabilizer, in particular to a modified hydroxyapatite-based composite heat stabilizer for PVC, and belongs to the field of material processing aids. Background technique [0002] PVC is easy to decompose at processing temperature, resulting in darkening of product color and changes in structure and properties. Therefore, during the processing of PVC, heat stabilizers must be added to prevent or reduce its decomposition. At present, commonly used heat stabilizers include lead salts, organotins, metal soaps and composite heat stabilizers. Lead salt heat stabilizer is the earliest developed PVC heat stabilizer with good heat stability. However, due to the strong toxicity of lead salt compounds, which pose a hazard to human and environmental safety, countries around the world are gradually restricting the use of lead salt heat stabilizers. Organotin heat stabilizers have good thermal stability and transparency, and l...

Claims

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Application Information

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IPC IPC(8): C08L27/06C08L23/06C08L91/06C08K13/06C08K9/04C08K9/10C08K3/32C08K5/098C08K5/3462
CPCC08K2003/325C08L27/06C08L2201/08C08L23/06C08K13/06C08K9/08C08K9/10C08K3/32C08K5/098C08K5/3462C08L91/06
Inventor 周喜张超
Owner SHAOYANG UNIV
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