Modified hydroxyapatite-based environment-friendly PVC composite heat stabilizer
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 dispersion, good synergy, and improving thermal stability
Inactive Publication Date: 2018-04-20
SHAOYANG UNIV
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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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Embodiment 1
[0021] The composite thermal stabilizer of this embodiment contains the following components by mass fraction: modified hydroxyapatite: 70%, zinc stearate: 15%, dibenzoylmethane: 5%, antioxidant 1010: 2% , Polyethylene wax: 8%.
Embodiment 2
[0023] The composite thermal stabilizer of this embodiment contains the following components by mass fraction: modified hydroxyapatite: 60%, zinc stearate: 20%, stearoylbenzoylmethane: 5%, antioxidant 1010: 3%, solid paraffin: 12%.
Embodiment 3
[0025] The composite thermal stabilizer of this example contains the following components in mass fraction: modified hydroxyapatite: 80%, zinc stearate: 10%, dibenzoylmethane: 4%, antioxidant 689: 1% , Polyethylene wax: 5%.
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The invention relates to a modified hydroxyapatite-based environment-friendly PVC composite heat stabilizer. The composite heat stabilizer is prepared from the following components in mass fraction: 60-80% of modified hydroxyapatite, 10-20% of zinc stearate, 3-5% of a beta-diketone-type compound, 1-3% of an antioxidant and 5-12% of a lubricating agent, wherein the beta-diketone-type compound is stearyl benzoylmethane, dibenzoylmethane, calcium acetylacetonate or zinc acetylacetonate, and the modified hydroxyapatite is prepared by adopting polyethylene glycol and calcium stearate as a compositemodifying agent and performing surface modification on hydroxyapatite. All components of the composite heat stabilizer provided by the invention have good synergistic effects, can obviously improve the heat stability of PVC, and have the advantages of being nontoxic, environmentally friendly and lower in cost.
Description
technical field [0001] The invention relates to a PVC heat stabilizer, in particular to a modified hydroxyapatite-based environment-friendly PVC composite heat stabilizer, which 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 ...
Claims
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IPC IPC(8): C08K13/06C08K9/10C08K9/04C08K3/32C08K5/098C08K5/07C08K5/00C08L91/06C08L23/06C08L27/06
CPCC08K3/32C08K5/0091C08K5/07C08K5/098C08K9/04C08K9/10C08K13/06C08K2003/325C08L23/06C08L27/06C08L91/06C08L2201/08
Inventor 周喜张超
Owner SHAOYANG UNIV
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