Composite PVC stabilizer

A technology of stabilizer and auxiliary heat stabilizer, applied in the field of composite PVC stabilizer, can solve the problems of high melting point of polyol, inconvenience of polyol, "zinc burning", etc., achieve good color, improve processing performance, and reduce balance torque Effect

Inactive Publication Date: 2016-07-20
淄博龙沙高分子材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest disadvantage of zinc-based heat stabilizers is that the ZnCl generated during use 2 It can promote the thermal degradation of PVC, that is, it is prone to "zinc burning", so it is necessary to add auxiliary stabilizers to avoid "zinc burning". The commonly used auxiliary stabilizers are β-diketone
[0004] However, compounding polyols directly with calcium-zinc composite heat stabilizers has a very big defect: polyols have a high melting point and are prone to segregation
This brings inconvenience to the application of polyols

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Composite PVC stabilizer is made from the following raw materials in parts by mass:

[0016]

[0017] The β-diketone is dibenzoylmethane.

[0018] Described lubricant selects stearic acid or polyethylene wax.

[0019] Described auxiliary thermal stabilizer selects epoxidized soybean oil.

Embodiment 2

[0021] Composite PVC stabilizer is made from the following raw materials in parts by mass:

[0022]

[0023] The β-diketone is selected from stearoylbenzoylmethane.

[0024] Described lubricant selects polyethylene wax.

[0025] Described auxiliary thermal stabilizer selects epoxidized soybean oil.

Embodiment 3

[0027] Composite PVC stabilizer is made from the following raw materials in parts by mass:

[0028]

[0029] The β-diketone is dibenzoylmethane.

[0030] Described lubricant selects stearic acid.

[0031] Described auxiliary thermal stabilizer selects epoxidized soybean oil.

[0032] Three kinds of composite thermal stabilizers of above-mentioned embodiment 1, 2 and 3 are added in 100 mass parts PVC respectively by 4 mass parts, then add 20 mass parts calcium carbonate, 5 mass parts TiO 2 1. 1 part by mass of stearic acid was kneaded by two rolls at 180° C. for 5 minutes to prepare a flaky sample with a thickness of 1 mm.

[0033] Table 1 Congo red experiment

[0034]

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Abstract

The invention relates to a composite PVC stabilizer and a preparation method thereof. The invention relates to the field of polyvinyl chloride (PVC) processing heat stabilizers. The stabilizer is prepared from the following raw materials, by mass: 50-70 parts of zinc stearate, 20-40 parts of calcium stearate, 20-30 parts of dibutyltin dilaurate, 10-20 parts of dimaltitol adipate, 10-20 parts of maleate, 3-5 parts of beta-dione, 1-3 parts of an epoxy compound, 5-7 parts of an auxiliary heat stabilizer, and 5-10 parts of a lubricant. With the materials, the high-performance calcium-zinc stearate and dimaltitol adipate PVC composite heat stabilizer is prepared. When the novel heat stabilizer provided by the invention is used in PVC plastic processing, characteristics such as ideal initial color and good long-time heat stabilization effect. Also, plasticization can be promoted, balance torque can be reduced, and processing performance can be improved. The heat stabilizer provided by the invention is highly efficient and environment-friendly.

Description

technical field [0001] The invention relates to a composite PVC stabilizer and belongs to the field of heat stabilizers for polyvinyl chloride (PVC) processing. Background technique [0002] Polyvinyl chloride (PVC) has the advantages of good processability, high strength, corrosion resistance, good insulation, and flame retardant, and is widely used in industrial and agricultural production. However, there are some defects in the PVC molecular chain, such as allyl chloride, etc. The processing temperature of PVC is generally above 170°C. At this high temperature, active Cl atoms such as allyl chloride are easily removed in the form of HCl, resulting in " "zipper" type chain reaction, making the color of PVC turn yellow or even black. And the generated HCl will further promote the thermal degradation of PVC. Therefore, heat stabilizers need to be added during PVC processing. Commonly used heat stabilizers include lead salt stabilizers, metal soaps, organotin compounds, or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08K5/098C08K5/57C08K5/09C08K5/07C08K5/1515C08K5/11
Inventor 沙作宏
Owner 淄博龙沙高分子材料科技有限公司
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