Preparation method of nano calcium carbonate for anti-sagging PVC plastifying paste

A technology of nano-calcium carbonate and plastisol, applied in the direction of chemical instruments and methods, fibrous fillers, dyeing physical treatment, etc., can solve the problems of poor performance, easy sagging of PVC plastisol, storage stability, etc. The effect of impact properties

Pending Publication Date: 2022-01-28
GUANGXI HUANA NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The invention aims at the problems of easy sag after spraying of PVC plasticizer and poor storage

Method used

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  • Preparation method of nano calcium carbonate for anti-sagging PVC plastifying paste
  • Preparation method of nano calcium carbonate for anti-sagging PVC plastifying paste
  • Preparation method of nano calcium carbonate for anti-sagging PVC plastifying paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of nano-calcium carbonate for anti-sag PVC plastisol, comprising the steps:

[0036] (1) The milk of lime with a specific gravity of 1.060 is introduced into the bubbling carbonization tower, and the temperature of the milk of lime is maintained at 25° C. After adding 1.0% crystal form control agent of calcium carbonate dry basis mass in the suspension, add 5 m 3 The gas flow rate of / h feeds the kiln gas whose volume concentration of carbon dioxide is 33%, and carries out the carbonation reaction under high-speed stirring, and when the pH of the carbonization reaction system≤7, the reaction is terminated to obtain the nano-calcium carbonate suspension; the crystal form control agent It is composed of sucrose and sodium polyacrylate with a mass ratio of 3:2;

[0037] (2) Pretreating the above suspension with phosphoric acid, the amount of phosphoric acid compound added is 0.5% of the mass of the suspension, the concentration is 8%, and the addition ...

Embodiment 2

[0041] A preparation method of nano-calcium carbonate for anti-sag PVC plastisol, comprising the steps:

[0042] (1) The milk of lime with a specific gravity of 1.075 is introduced into the bubbling carbonization tower, and the temperature of the milk of lime is maintained at 28° C. After adding 1.5% of the crystal form control agent of calcium carbonate dry basis in the suspension, it is 3 The gas flow rate of / h feeds the kiln gas whose volume concentration of carbon dioxide is 33%, and carries out the carbonation reaction under high-speed stirring, and when the pH of the carbonization reaction system≤7, the reaction is terminated to obtain the nano-calcium carbonate suspension; the crystal form control agent It is composed of sucrose and sodium polyacrylate with a mass ratio of 2:1;

[0043] (2) The above-mentioned suspension is pretreated with sodium hexametaphosphate, the amount of sodium hexametaphosphate added is 0.7% of the suspension mass, the concentration is 5%, and...

Embodiment 3

[0047] A preparation method of nano-calcium carbonate for anti-sag PVC plastisol, comprising the steps:

[0048] (1) The milk of lime with a specific gravity of 1.090 is introduced into the bubbling carbonization tower, and the temperature of the milk of lime is maintained at 35° C. After adding 2% crystal form control agent of calcium carbonate dry basis mass in the suspension, it is 3 The gas flow rate of / h feeds the kiln gas with a carbon dioxide volume concentration of 35% and carries out carbonation reaction under high-speed stirring, and when the pH of the carbonization reaction system≤7, the reaction is terminated to obtain a nano-calcium carbonate suspension; the crystal form control agent It consists of sucrose and sodium polyacrylate with a mass ratio of 1:1;

[0049] (2) The above-mentioned suspension is pretreated with stearyl phosphate, the addition amount of stearyl phosphate is 0.5% of the suspension mass, the concentration is 8%, and the addition rate is 8mL / m...

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Abstract

The invention discloses a preparation method of nano calcium carbonate for anti-sagging PVC (polyvinyl chloride) plastifying paste. The method comprises the following steps of: pretreating suspension liquid by using a phosphoric acid compound; compounding the pretreated suspension liquid into a surfactant by using fatty acid saponification liquid, polyethylene glycol, fatty acid methyl ester sodium sulfonate and alkylphenol polyoxyethylene ether phosphate monoester to obtain a modified nano calcium carbonate suspension; and finally, carrying out filter pressing, drying and sieving to obtain the anti-sagging nano calcium carbonate for the PVC plastifying paste. According to the method, after the PVC accelerating paste is filled with the nano calcium carbonate, the nano calcium carbonate has relatively good sagging performance, flowability, viscoelasticity, dispersity, impact resistance and stability, and the nano calcium carbonate can be used as an excellent automobile chassis filler.

Description

technical field [0001] The invention belongs to the technical field of calcium carbonate surface treatment, in particular to a preparation method of nanometer calcium carbonate for anti-sag PVC plasticizer. Background technique [0002] PVC plasticizer is a typical application form of soft PVC products. PVC plasticizer is formed by suspending PVC paste resin and other additives, such as fillers, stabilizers and pigments, in liquid plasticizers. Paste dispersion system. PVC paste resin has the advantages of simple preparation process, stable performance, easy control, convenient use, excellent product performance, good chemical stability, easy coloring and mechanical strength. Used in various fields such as wallpaper, automobiles, toys, packaging, etc. For the automotive chassis coating industry, PVC plastisol should have good thixotropy and stability, so that it can exhibit low viscosity due to high-speed shear during use (spraying), easy to spray, level, and not sticky af...

Claims

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Application Information

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IPC IPC(8): C09C1/02C09C3/04C09C3/06C09C3/08C09C3/10C08K9/02C08K9/04C08K3/26C08L27/06
CPCC09C1/024C09C3/006C09C3/04C09C3/043C09C3/063C09C3/08C09C3/10C08K9/02C08K9/04C08K9/08C08K3/26C08L27/06C08K2201/011C08K2003/265
Inventor 莫小叶朱勇荣权黄雪雯
Owner GUANGXI HUANA NEW MATERIALS TECH CO LTD
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