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Composite material of polyvinyl chloride and prepn method

A composite material and polyvinyl chloride technology, applied in the field of polyvinyl chloride composite materials, can solve the problems such as the difficulty of greatly improving the performance of composite materials, the decrease of material strength elongation at break, and the limitation of application fields, and achieve a good synergistic stacking effect. , The effect of reducing material cost and improving cost performance

Inactive Publication Date: 2004-03-10
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during use, PVC also exposes disadvantages such as high brittleness, poor thermal stability, and poor processability, which limit its application fields.
Filling modification is usually used to improve its dimensional stability, reduce shrinkage and increase its rigidity. For example, the use of calcium carbonate, wollastonite, kaolin, talc, mica and other inorganic substances to fill polyvinyl chloride can improve the hardness of the material. However, at the same time, the strength of the material, especially the elongation at break, is reduced, and because the inorganic particles are easy to agglomerate, it is difficult to greatly improve the performance of the composite material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0037] Preparation of modified calcium carbonate: Add 100 parts of calcium carbonate with a particle size of 2000 mesh into 100 parts of absolute ethanol, stir and mix evenly, then add 2 parts of coupling agent KH550, and then stir at a constant temperature of 70-90°C After reacting for 6-9 hours, filter, dry and pulverize to obtain modified calcium carbonate.

[0038]Preparation of modified wollastonite: using the same modification method as above to modify wollastonite with a particle size of 1750 mesh to obtain modified wollastonite.

[0039] Preparation of polyvinyl chloride composite material: 100 parts of polyvinyl chloride (Beijing Chemical Plant No. 2), 10 parts of modified calcium carbonate, 5 parts of modified wollastonite, 10 parts of plasticizer DOP, 0.2 part of 1010 antioxidant, liquid paraffin 0.8 parts, 0.5 parts of stearic acid, 4 parts of heat stabilizer, pre-mixed evenly, melt blending extrusion on the HAAKE conical twin-screw extruder, the processing conditi...

Embodiment 2

[0043] With embodiment 1, wherein the content of modified calcium carbonate is 20 parts. The samples were characterized by the same method as in Example 1, and the results are shown in Table 2.

Embodiment 3

[0045] With embodiment 1, wherein the content of modified wollastonite is 2 parts. The samples were characterized by the same method as in Example 1, and the results are shown in Table 2.

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PUM

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Abstract

A polyvinyl chloride composition is prepared from hard polyvinyl chloride, superfine spherical calcium carbonate powder treated by coupling agent and natural acicular wollastonite treated by coupling agent through mixing them with thermal stability, antioxidizing agent, lubricant and plasticizer, and fusing while extruding out. Its advantage are high impact, bending and tension strengthes, and high thermal stability.

Description

technical field [0001] The invention relates to a rigid polyvinyl chloride composite material, in particular to a polyvinyl chloride composite material in which two inorganic materials are co-filled in proportion. [0002] The present invention also relates to a method for preparing the above-mentioned composite material. Background technique [0003] Polyvinyl chloride resin is widely used in pipes, rods, films, insulating materials, building materials and other fields due to its excellent comprehensive properties such as flame retardancy, corrosion resistance, insulation, wear resistance, low price, and wide source of raw materials. However, in the process of use, PVC also exposes disadvantages such as high brittleness, poor thermal stability, and poor processability, which limit its application field. Filling modification is usually used to improve its dimensional stability, reduce shrinkage and increase its rigidity. For example, the use of calcium carbonate, wollastoni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/541C08K9/00C08L27/06
Inventor 阳明书巩方玲张世民赵春贵冯猛
Owner INST OF CHEM CHINESE ACAD OF SCI