Phosphorus tailing/polyvinyl chloride composite material and preparation method thereof

A technology of polyvinyl chloride and composite materials, applied in the field of composite materials, can solve the problems of restricting the development of PVC, low impact strength, insufficient heat resistance, etc., to improve processing rheological properties, improve interface bonding, and improve mechanical properties Effect

Inactive Publication Date: 2016-11-16
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PVC also has disadvantages such as low impact strength and insufficient heat resistance, which limit the further development of PVC.

Method used

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  • Phosphorus tailing/polyvinyl chloride composite material and preparation method thereof
  • Phosphorus tailing/polyvinyl chloride composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0030] The preparation process of the phosphate tailings / polyvinyl chloride composite material of the present invention:

[0031] Step 1: Dry the phosphorus tailings in a drying box;

[0032] Step two, premix the dried phosphate tailings and polyvinyl chloride according to the formula ratio, so that the raw materials are initially mixed uniformly to obtain a premix, wherein the formula is composed of the following raw materials: 100 parts of PVC, 80-200 phosphate tailings Parts, 2-7 parts of surface modifier, 5-10 parts of polymer modifier, 4-9 parts of heat stabilizer, 3-7 parts of lubricant.

[0033] Step three, add the premix obtained in step two into a twin-screw extruder for melt extrusion, where: the twin-screw extruder is an in-phase parallel twin-screw with a length-to-diameter ratio of 32:1 to 48:1; The speed of the machine is 30~50r / min; the processing temperature is controlled within 160~185℃.

Embodiment 1

[0039] Raw material composition: 100 parts of PVC, 15 parts of phosphate tailings, 1 part of surface modifier, 6 parts of polymer modifier, 4 parts of heat stabilizer, 1 part of lubricant.

[0040] The twin-screw extruder used has a diameter of 25cm, a length-to-diameter ratio of 32:1, a rotation speed of 30r / min, and a processing temperature of 160±5°C in the first zone, 165±5°C in the second zone, 170±5°C in the third zone, and four zones 180±5℃, machine head 170±5℃.

[0041] The phosphate tailings / polyvinyl chloride composite material of this embodiment was prepared according to the above preparation method.

Embodiment 2

[0043] Raw material composition: 100 parts of PVC, 30 parts of phosphate tailings, 1.5 parts of surface modifier, 6 parts of polymer modifier, 4 parts of heat stabilizer, 2.5 parts of lubricant.

[0044] The twin-screw extruder used has a diameter of 30cm, a length-to-diameter ratio of 32:1, a speed of 30r / min, and a processing temperature of 160±5℃ in the first zone, 165±5℃ in the second zone, 170±5℃ in the third zone, and four zones 180±5℃, machine head 170±5℃.

[0045] The phosphate tailings / polyvinyl chloride composite material of this embodiment was prepared according to the above preparation method.

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Abstract

The invention discloses a phosphate tailing / polyvinyl chloride composite material and a preparation method of the phosphate tailing / polyvinyl chloride composite material. The phosphate tailing / polyvinyl chloride composite material comprises the following components in parts by weight: 100 parts of polyvinyl chloride, 15 to 120 parts of phosphate tailings, 1 to 4 parts of surface modifiers, 3 to 8 parts of polymer modifiers, 3 to 7 parts of heat stabilizers, and 1 to 5 parts of lubricants, wherein the particle sizes of the phosphate tailings are below 200 meshes. The preparation method comprises the following steps: uniformly mixing the dried phosphorus tailings, polyvinyl chloride aggregates, the surface modifiers, the polymer modifiers, the heat stabilizers and the lubricants to obtain a premix, and adding the obtained premix to a twin-screw extruder to be extruded in a melting manner so as to obtain the phosphorus tailing / polyvinyl chloride composite material. According to the invention, phosphate flotation tailings are taken as fillers to lower the cost of the polyvinyl chloride, furthermore, organic flotation agents are attached on the surfaces of the phosphate tailings, so that interfacial adhesion between inorganic particles of the phosphate tailings and polyvinyl chloride matrix resin can be improved, furthermore, the mechanical properties of the composite material are enhanced, and the processing rheological properties thereof are improved.

Description

Technical field [0001] The invention belongs to the technical field of composite materials, and specifically relates to a phosphorus tailings / polyvinyl chloride composite material and a preparation method thereof. Background technique [0002] Phosphate rock is an important chemical mineral raw material, and it is also a raw material for phosphate fertilizer required for global agricultural production. Although my country is a country with large reserves of phosphate ore, more than 90% of my country's phosphate ore grade is below 26%, and the average grade is only 17%. In order to meet the requirements of industrial production of phosphoric acid, phosphate ore needs to obtain phosphate concentrates that meet the production requirements through beneficiation technology, and at the same time by-produce a large amount of phosphate tailings. At present, because it is difficult to utilize phosphorus tailings and it is difficult to recover useful components, a large number of phosphor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L23/28C08L33/04C08K3/00B29C47/92B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704C08L27/06C08L2205/03C08L2205/035C08L23/286C08L33/04C08K3/013
Inventor 刘生鹏殷祥丁一刚许莉莉龙秉文邓伏礼樊庆春
Owner WUHAN INSTITUTE OF TECHNOLOGY
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