Composite of full filled unplasticizing polyvinyl chloride/calcium carbonate and preparation process thereof

A composite material, polyvinyl chloride technology, applied in the field of highly filled unplasticized polyvinyl chloride/calcium carbonate composite material and its preparation, can solve problems such as particle agglomeration, achieve simple preparation process, improved impact performance, and tensile strength insignificant effect

Active Publication Date: 2005-03-23
SHANGHAI CHLOR ALKALI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the particle size decreases, the particle agglomeration phenomenon gradually becomes serious.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] According to the formula in Table 1, various materials were mixed in a high-speed kneader according to the formula dosage, and the material was discharged after the temperature reached 90°C. Then melt-blended at 175°C for 8 minutes on a two-roll mill, and then the sheets were removed, and samples were prepared and tested according to the requirements of the national standard (results are shown in Table 2).

Embodiment 2

[0021] According to the formula in Table 1, various materials were mixed in a high-speed kneader according to the formula dosage, and the material was discharged after the temperature reached 90°C. Then melt-blended at 175°C for 10 minutes on a two-roll mill, and then the sheets were removed, and samples were prepared and tested according to the national standard (results are shown in Table 3).

Embodiment 3

[0023] According to the formula in Table 1, various materials were mixed in a high-speed kneader according to the formula dosage, and the material was discharged after the temperature reached 90°C. Then melt-blended at 170°C for 7 minutes on a two-roll mill, and then the sheets were removed, and samples were prepared and tested according to the requirements of the national standard (results are shown in Table 4).

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PUM

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Abstract

The invention discloses a highly-filled unplasticized PVC/CaCO3 composite and its preparing method. Its material composition is in weight share: PVC resin 100 shares, CaCO3 filling agent 1-8 shares, high-molecular modifier 0-40 shares, surface modifier 1-6 shares, heat stabilizer 1-8 shares and lubricant 0.2-5 shares. It can be made by using a double-screw extruder or a double-roller kneader through fusion commixing method. On the condition of improving its shock resistance, it realizes the filling of a large amount of CaCO3 and thus can realize the retainment of its performance and reduce the cost. And it can obtain a series of different-toughness composites by regulating the formula (such as CaCO3 content, sort and use level of CaCO3 surface modifier, proportion of CaCO3 to high-molecular modifier, etc.). In addition, it has simple manufacture process, economic and feasible.

Description

technical field [0001] The invention relates to a highly filled unplasticized polyvinyl chloride (U-PVC) / calcium carbonate composite material and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is a general-purpose resin with large output and excellent comprehensive properties. It has good physical, mechanical, chemical and electrical properties, as well as flame retardancy, transparency, chemical resistance and many other advantages. With the growth of the economy, the country vigorously promotes and uses chemical building materials, and the proportion of hard products in PVC products continues to increase, especially the demand for pipes, plates, profiles, etc. is growing rapidly. [0003] Among them, calcium carbonate (CaCO 3 ) has been widely used as a filler in the processing of polyvinyl chloride, and has become the main means to reduce the cost of products; at the same time, the presence of a large amount of calcium carbonate can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/11C08L27/06
Inventor 高光涛袁茂全张勇潘祥江李恩军张良
Owner SHANGHAI CHLOR ALKALI CHEM
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