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Method for modifying nano calcium carbonate by titanate and preparation method of PVC (polyvinyl chloride) plastic

A technology of nano-calcium carbonate and titanate, which is applied in the treatment of fibrous fillers and dyed low-molecular organic compounds, can solve the problems of poor compatibility of nano-calcium carbonate and not greatly improved rheological properties, and achieve improved The effects of mechanical properties and rheological properties, strong binding force, and good compatibility

Inactive Publication Date: 2014-01-01
昆山市华浦塑业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The compatibility of modified nano-calcium carbonate and PVC in the prior art is poor. Filling PVC with modified nano-calcium carbonate does not improve the mechanical properties of PVC, such as tensile strength, elongation at break and impact strength. There is a greater improvement, but the rheological properties have not been greatly improved

Method used

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  • Method for modifying nano calcium carbonate by titanate and preparation method of PVC (polyvinyl chloride) plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add nano-calcium carbonate with an average particle size of 30nm into a large flask filled with deionized water, place the flask in a constant temperature water bath, install a high-speed mixer for the flask, and insert the stirring rod to a suitable position below the liquid level. Control the temperature of the water bath to 50°C. Start the stirrer, the control speed is 2500rpm. After stirring for 5 minutes, add 0.4% bis(dioctyloxypyrophosphate) ethylene titanate accounting for the mass of the nano-calcium carbonate, and continue stirring for 60 minutes to obtain a calcium carbonate dispersion. The average particle diameter of the nanoparticles in the calcium carbonate dispersion was 440nm measured by a Master2000 laser particle size analyzer from Malvern, UK. Then the calcium carbonate dispersion is filtered, dried, ground and passed through a 200-mesh sieve to obtain the modified nano-calcium carbonate.

[0025] Based on the quality of PVC resin, put 30% modified ...

Embodiment 2

[0027] Add nano-calcium carbonate with an average particle size of 35nm into a large flask filled with deionized water, place the flask in a constant temperature water bath, install a high-speed mixer for the flask, and insert the stirring rod to a suitable position below the liquid level. Control the temperature of the water bath to 55°C. Start the stirrer, the control speed is 3000rpm. After stirring for 7 minutes, add 0.6% bis(dioctyloxypyrophosphate) ethylene titanate accounting for the mass of the nano-calcium carbonate, and continue stirring for 80 minutes to obtain a calcium carbonate dispersion. The average particle diameter of the nanoparticles in the calcium carbonate dispersion was 405nm when tested with a Master2000 laser particle size analyzer from Malvern, UK. Then the calcium carbonate dispersion is filtered, dried, ground and passed through a 200-mesh sieve to obtain the modified nano-calcium carbonate.

[0028] Based on the quality of PVC resin, put 40% modi...

Embodiment 3

[0030] Add nano-calcium carbonate with an average particle size of 40nm into a large flask filled with deionized water, place the flask in a constant temperature water bath, install a high-speed mixer for the flask, and insert the stirring rod to a suitable position below the liquid level. Control the water bath temperature to 60°C. Start the stirrer, the control speed is 3500rpm. After stirring for 8 minutes, add 0.9% bis(dioctyloxypyrophosphate) ethylene titanate accounting for the mass of the nano-calcium carbonate, and continue stirring for 90 minutes to obtain a calcium carbonate dispersion. The average particle diameter of the nanoparticles in the calcium carbonate dispersion liquid was measured to be 340nm by using a Master2000 laser particle size analyzer from Malvern, UK. Then the calcium carbonate dispersion is filtered, dried, ground and passed through a 200-mesh sieve to obtain the modified nano-calcium carbonate.

[0031] Based on the quality of PVC resin, put 4...

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Abstract

The invention discloses a method for modifying nano calcium carbonate by titanate and a preparation method of PVC plastic. The method for modifying nano calcium carbonate by bis (p,p-bis-ethylhexyl diphosphato) ethanediolato titanate comprises the steps as follows: (1), dispersing nano calcium carbonate in deionized water; (2), adding bis (p,p-bis-ethylhexyl diphosphato) ethanediolato titanate, and continuously performing dispersion; and (3), performing filtering and drying. According to the method, bis (p,p-bis-ethylhexyl diphosphato) ethanediolato titanate is adopted for coating nano calcium carbonate dispersed in a liquid phase, so that lipophilicity of nano calcium carbonate is enhanced, dispersibility and liquidity of nano calcium carbonate in PVC resin are improved, and good compatibility between nano calcium carbonate and the PVC resin is obtained; and further, through the improvement of compatibility, stronger cohesion between the PVC resin and nano calcium carbonate is guaranteed, and a mechanical property and a rheological property are improved.

Description

technical field [0001] The invention relates to the technical field of PVC, in particular to a method for modifying nano-calcium carbonate with titanate and a preparation method for PVC plastic. Background technique [0002] PVC (polyvinyl chloride) is one of the general-purpose plastics with excellent comprehensive properties. It has excellent comprehensive properties such as flame retardancy, corrosion resistance, insulation, and wear resistance, as well as the advantages of low price and wide source of raw materials. It has been widely used in various fields. application. However, in the processing and application of PVC, especially when it is used as a structural material, it also exposes disadvantages such as low impact strength and poor thermal stability. In addition, its UV resistance is poor, and it is easy to age under long-term outdoor sunlight, so it needs to be tested. Modified to improve its application performance. Nano-calcium carbonate is an excellent inorg...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/08C08L27/06C08K9/10C08K9/04C08K3/26C08K3/30C08K5/12
Inventor 吴镇宇
Owner 昆山市华浦塑业有限公司
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