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Preparation method of stone-crash-resistant coating modified calcium carbonate for PVC automobile chassis

A technology of automobile chassis and calcium carbonate, which is applied in the direction of calcium carbonate/strontium/barium, coating, fibrous filler, etc., can solve the problems of complex process flow, low production efficiency and high cost, and achieve simple preparation process and high production efficiency High and low cost effect

Inactive Publication Date: 2017-07-07
GUANGXI UNIV FOR NATITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the preparation and modification of calcium carbonate used in anti-stone impact coatings for PVC automobile chassis are separated, or the crystal form control agent and modifier used are different substances, which makes the process flow more complicated, production efficiency is low, and cost is high.

Method used

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  • Preparation method of stone-crash-resistant coating modified calcium carbonate for PVC automobile chassis
  • Preparation method of stone-crash-resistant coating modified calcium carbonate for PVC automobile chassis
  • Preparation method of stone-crash-resistant coating modified calcium carbonate for PVC automobile chassis

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A kind of preparation method that is used for PVC automobile chassis anti-stone impact coating modified calcium carbonate, concrete operation steps are as follows:

[0030] (1) Prepare a calcium hydroxide suspension with a mass concentration of 15%, add polyacrylic acid-sodium polyacrylate with a dry weight of calcium hydroxide of 5% under stirring, stir at 50°C for 30min, and then add 15L / h 30% carbon dioxide gas was introduced at a rate of 30%, and the stirring reaction was continued until the pH=7.0, then the heating was stopped, and then calcium hydroxide was added with a dry weight of 3% polyacrylic acid-sodium polyacrylate, and the stirring was continued for 40min to obtain a calcium carbonate slurry ; Wherein the mass ratio of polyacrylic acid-sodium polyacrylate is 10:1000, the molecular weight of polyacrylic acid is 500, and the molecular weight of sodium polyacrylate is 500;

[0031] (2) The calcium carbonate slurry is subjected to solid-liquid separation, and...

Embodiment 2

[0033] A kind of preparation method that is used for PVC automobile chassis anti-stone impact coating modified calcium carbonate, concrete operation steps are as follows:

[0034] (1) Prepare a calcium hydroxide suspension with a mass concentration of 12%, add polyacrylic acid-sodium polyacrylate with a dry weight of calcium hydroxide of 4% in a stirring state, stir at 80°C for 20min, and then add 10L / h 50% carbon dioxide gas was introduced at a rate of 50%, and the stirring reaction was continued until the pH=7.5, then the heating was stopped, and then calcium hydroxide was added with a dry weight of 2% polyacrylic acid-sodium polyacrylate, and the stirring was continued for 30min to obtain a calcium carbonate slurry ; Wherein the mass ratio of polyacrylic acid-sodium polyacrylate is 5:1000, the molecular weight of polyacrylic acid is 1000, and the molecular weight of sodium polyacrylate is 1000;

[0035] (2) The calcium carbonate slurry is subjected to solid-liquid separatio...

Embodiment 3

[0037] A kind of preparation method that is used for PVC automobile chassis anti-stone impact coating modified calcium carbonate, concrete operation steps are as follows:

[0038] (1) Prepare a calcium hydroxide suspension with a mass concentration of 12%, add polyacrylic acid-sodium polyacrylate with a dry weight of calcium hydroxide of 6% in a stirring state, stir at 100°C for 20min, and then add it at 30L / h The speed feeds the gas that content is 98% carbon dioxide, continues to stir reaction until pH=7.5, stops heating, then adds calcium hydroxide dry basis weight and is 4% polyacrylic acid-sodium polyacrylate, continues to stir for 50min, obtains calcium carbonate slurry ; Wherein the mass ratio of polyacrylic acid-sodium polyacrylate is 1:1000, the molecular weight of polyacrylic acid is 3000, and the molecular weight of sodium polyacrylate is 3000;

[0039] (2) The calcium carbonate slurry is subjected to solid-liquid separation, and the separated liquid is recovered for ...

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Abstract

The invention discloses a preparation method of stone-crash-resistant coating modified calcium carbonate for a PVC automobile chassis. The preparation method comprises the following steps: adding polyacrylic acid-sodium polyacrylate into a calcium hydroxide turbid liquid while stirring, wherein the mass concentration of the turbid liquid is 10-20%, stirring the mixture for 20-30min in a temperature range from room temperature to 100 DEG C, then introducing gas containing carbon dioxide at a rate of 10-40L / h, continuously stirring the mixture to react till the pH is 7.0-7.5, stopping heating, then adding polyacrylic acid-sodium polyacrylate, and continuously stirring the mixture for 30-50min to obtain calcium carbonate slurry; and separating the calcium carbonate slurry, recovering a liquid for configuring calcium hydroxide, and drying, crushing and packaging a solid to obtain modified calcium carbonate micropowder. By adopting low molecular weight polyacrylic acid-sodium polyacrylate to control the shape of calcium carbonate and modify the calcium carbonate at the same time, the rodlike calcium carbonate micropowder is applied to the stone-crash-resistant coating for the PVC automobile chassis, can endow a PVC plastic paste with good properties such as thixotropic property, yield value and viscosity, the method is simple, the production efficiency is high and the cost is low..

Description

technical field [0001] The invention relates to the technical field of inorganic materials, in particular to a preparation method of modified calcium carbonate used for PVC automobile chassis anti-stone impact coating. Background technique [0002] Nano / ultrafine calcium carbonate is widely used in various industries and departments such as rubber, papermaking, paint, medicine, cosmetics, etc. Different industries have different requirements for the form, particle size and surface properties of calcium carbonate. Therefore, the synthesis of nano-calcium carbonate materials with controllable morphology and structure is one of the hotspots in the research of calcium carbonate industry. At present, with the help of various crystal form control agents, the method of solution synthesis has prepared nano-calcium carbonate materials with controllable shape, size and structure. Nano-calcium carbonate, in which vaterite calcium carbonate, disc-shaped vaterite-type calcium carbonate, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/08C09C3/10C01F11/18C09D127/06C09D7/12
CPCC01F11/18C08K2201/011C08L2205/025C09C1/021C09C3/08C09C3/10C09D7/70C09D127/06C08L27/06C08K9/08C08K2003/265C08K5/12C08K2003/2206
Inventor 袁爱群周泽广王耀宣朱勇韦冬萍黄增尉马少妹
Owner GUANGXI UNIV FOR NATITIES