Modification method of calcium carbonate and application of modified calcium carbonate in PVC pipes

A PVC pipe, calcium carbonate technology, applied in chemical instruments and methods, fibrous fillers, dyeing and physical treatment, etc., can solve the problems of poor adhesion between the matrix and filler interface, low mechanical strength of PVC pipes, etc., to improve compatibility. excellent flame retardant effect and strong impact resistance

Inactive Publication Date: 2018-12-07
贺州钟山县双文碳酸钙新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current method for modifying calcium carbonate, the main surface treatment agent is usually fatty acid or its salt. Although the dispersion and processing fluidity of the system have been improved, it is difficult to effectively combine PVC resin with calcium carbonate filler, resulting in The interface adhesion between the matrix and the filler is poor, resulting in low mechanical strength of the PVC pipe

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A modified calcium carbonate applied to PVC pipes, the modified calcium carbonate is through the following modification steps:

[0036] (1) Put the marble into the crusher for crushing, and crush it to a particle size ≥ 20 mesh to obtain calcium carbonate coarse powder;

[0037] (2) Add calcium carbonate coarse powder into the grinder, and then add a surface treatment agent composed of disodium cocamide sulfosuccinate monoester and nonylphenol polyoxyethylene ether in a weight ratio of 1:3, the surface treatment The addition of agent is 2% of marble weight, grinds, and the particle size is 200 mesh calcium carbonate fine powder;

[0038] (3) Add calcium carbonate fine powder into the blender, and then add a secondary modifier composed of octaaminophenyl clathrate silsesquioxane and sodium laureth-4 phosphate with a weight ratio of 2:1 into the blender , the addition of the secondary modifier is 2.1% of the marble weight, and the mixture is evenly mixed at a high speed ...

Embodiment 2

[0047] A modified calcium carbonate applied to PVC pipes, the modified calcium carbonate is through the following modification steps:

[0048] (1) Put the marble into the crusher for crushing, and crush it to a particle size ≥ 20 mesh to obtain calcium carbonate coarse powder;

[0049] (2) Add calcium carbonate coarse powder into the grinder, and then add a surface treatment agent composed of disodium cocamide sulfosuccinate monoester and nonylphenol polyoxyethylene ether in a weight ratio of 1:4, the surface treatment The addition of agent is 3% of marble weight, grinds, and it is 250 order calcium carbonate fine powder that particle diameter is obtained;

[0050] (3) Add calcium carbonate fine powder into the blender, and then add the secondary modifier composed of octaaminophenyl clathrate silsesquioxane and sodium lauryl ether-4 phosphate with a weight ratio of 3:1 into the blender , the addition of the secondary modifier is 1.5% of the marble weight, and the mixture is u...

Embodiment 3

[0059] A modified calcium carbonate applied to PVC pipes, the modified calcium carbonate is through the following modification steps:

[0060] (1) Put the marble into the crusher for crushing, and crush it to a particle size ≥ 20 mesh to obtain calcium carbonate coarse powder;

[0061] (2) Add calcium carbonate coarse powder into the grinder, and then add a surface treatment agent composed of disodium cocamide sulfosuccinate monoester and nonylphenol polyoxyethylene ether in a weight ratio of 1:3, the surface treatment The addition of agent is 4% of marble weight, grinds, and the particle size is 300 mesh calcium carbonate fine powder;

[0062] (3) Add calcium carbonate fine powder into the blender, and then add a secondary modifier composed of octaaminophenyl clathrate silsesquioxane and sodium laureth-4 phosphate with a weight ratio of 2:1 into the blender , the addition of the secondary modifier is 2% of the marble weight, and the mixture is evenly mixed at a high speed to...

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Abstract

The invention discloses a modification method of calcium carbonate and application of modified calcium carbonate in PVC pipes. The method includes: firstly conducting surface modification on calcium carbonate with disodium cocamidopropyl sulfosuccinate monoester and nonylphenol polyoxyethylene ether, and then using octa(aminophenyl)silsesquioxane and sodium laureth-4 phosphate for second surface modification. The modified calcium carbonate obtained by the invention has the characteristics of high dispersibility, high toughness, weather resistance, heat resistance, high strength, high toughness, etc, as the filler of the PVC pipe system, the modified calcium carbonate can endow pipes with high strength, high toughness, corrosion resistance, good heat resistance, strong impact resistance andother performance, prolongs the service life of the pipes and widens the application fields of the pipes.

Description

technical field [0001] The invention relates to the technical field of plastic pipes, in particular to a method for modifying calcium carbonate and its application in PVC pipes. Background technique [0002] PVC pipe has the characteristics of strong corrosion resistance, high strength, and good rigidity. Therefore, it is widely used in construction, municipal, In the field of industry and agriculture, it is a plastic pipe whose scope of application is second only to polyethylene. However, due to the poor heat resistance and impact resistance of PVC resin itself, the plastic pipes made of PVC resin also have poor heat resistance, and are prone to aging, deformation, and brittleness under light conditions, which shortens the life of the pipe. service life. [0003] Calcium carbonate is one of the important fillers for PVC pipes, but because the particle size of calcium carbonate is smaller and the number of atoms on the surface is more, the surface energy is higher, the ads...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/04C09C3/08C09C3/10C09C3/12C08K9/04C08K9/06C08K3/26C08L27/06C08L75/04C08K13/06
CPCC01P2006/21C01P2006/22C01P2006/37C08K3/26C08K9/04C08K9/06C08K2003/265C08L27/06C08L2201/08C08L2203/18C08L2205/035C09C1/021C09C3/006C09C3/041C09C3/08C09C3/10C09C3/12C08L75/04C08K13/06
Inventor 唐文易双
Owner 贺州钟山县双文碳酸钙新材料有限公司
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