Method for modifying nano calcium carbonate by using boric acid ester and preparation method of PVC (polyvinyl chloride) plastic

A technology of nano-calcium carbonate and borate ester, which is applied in the treatment of fibrous fillers and dyed low-molecular-weight organic compounds, can solve the problems of poor compatibility of nano-calcium carbonate and not greatly improved rheological properties, and achieve improved Mechanical properties and rheological properties, strong binding force, effect of enhancing lipophilicity

Inactive Publication Date: 2014-01-01
昆山市华浦塑业有限公司
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  • Abstract
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  • 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

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  • Method for modifying nano calcium carbonate by using boric acid ester and preparation method of PVC (polyvinyl chloride) plastic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add octadecyltrimethylammonium bromide, which accounts for 0.2% of the mass of nano-calcium carbonate, into a large flask filled with deionized water to fully dissolve it, and then add nano-calcium carbonate with an average particle size of 30nm. Put the flask into a constant temperature water bath, install a high-speed stirrer 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 1500rpm. After stirring for 5 minutes, add 0.8% borate, which accounts for the mass of nano-calcium carbonate, adjust the rotation speed to 1000 rpm, and stir for 60 minutes to obtain a calcium carbonate dispersion. The average particle diameter of the nanoparticles in the calcium carbonate dispersion liquid was tested with a Master2000 laser particle size analyzer from Malvern, UK, to be 400nm. Then the calcium carbonate dispersion is filtered, dried, pulverized and passed...

Embodiment 2

[0027] Add octadecyltrimethylammonium bromide, which accounts for 0.3% of the mass of nano-calcium carbonate, into a large flask filled with deionized water to fully dissolve it, and then add nano-calcium carbonate with an average particle size of 35nm. Put the flask into a constant temperature water bath, install a high-speed stirrer for the flask, and insert the stirring rod to a suitable position below the liquid level. Control the temperature of the water bath to 65°C. Start the stirrer, the control speed is 1800rpm. After stirring for 7 minutes, add 1% borate, which accounts for the mass of nano-calcium carbonate, adjust the rotation speed to 1200 rpm, and stir for 80 minutes to obtain a calcium carbonate dispersion. The average particle size of the nanoparticles in the calcium carbonate dispersion was measured to be 370nm with a Master2000 laser particle size analyzer from Malvern, UK. Then the calcium carbonate dispersion is filtered, dried, pulverized and passed thro...

Embodiment 3

[0030] Add octadecyltrimethylammonium bromide, which accounts for 0.4% of the mass of nano-calcium carbonate, into a large flask filled with deionized water to fully dissolve it, and then add nano-calcium carbonate with an average particle size of 40nm. Put the flask into a constant temperature water bath, install a high-speed stirrer for the flask, and insert the stirring rod to a suitable position below the liquid level. Control the temperature of the water bath to 70°C. Start the stirrer, the control speed is 2100rpm. After stirring for 8 minutes, add 1.3% borate, which accounts for the mass of nano-calcium carbonate, adjust the rotation speed to 1500 rpm, and stir for 90 minutes to obtain a calcium carbonate dispersion. The average particle size of the nanoparticles in the calcium carbonate dispersion was 324nm when tested with a Master2000 laser particle size analyzer from Malvern, UK. Then the calcium carbonate dispersion is filtered, dried, pulverized and passed throu...

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Abstract

The invention discloses a method for modifying nano calcium carbonate by using boric acid ester and a preparation method of a PVC plastic. The method comprises a preparation method of the nano calcium carbonate modified by the boric acid ester. The method comprises the steps as follows: 1), nano calcium carbonate is dispersed into deionized water; 2), the boric acid ester is added, and dispersion is performed continuously; and 3), filtering and drying are performed. According to the method, the boric acid ester is used for coating the nano calcium carbonate dispersed in a liquid phase, so that the lipophilicity of the nano calcium carbonate is enhanced, the dispersibility and the mobility of the nano calcium carbonate in a PVC resin are improved, and the nano calcium carbonate has good compatibility with the PVC resin. The improvement on the compatibility guarantees stronger binding force of the PVC resin and the nano calcium carbonate, and the mechanical property and the rheological property are improved.

Description

technical field [0001] The invention relates to the technical field of PVC, in particular to a method for borate-modified nano-calcium carbonate 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 inorganic fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/08C08K9/10C08K9/04C08K3/26C08L27/06
Inventor 吴镇宇
Owner 昆山市华浦塑业有限公司
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