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Preparation method of modified nano calcium carbonate for PVC automobile primer

A technology of nano calcium carbonate and calcium carbonate, applied in the field of surface modification of nano calcium carbonate, can solve the problems of insufficient high temperature resistance, corrosion resistance and stone chipping resistance, preparation requiring a certain length of time, and many steps for separating nano calcium carbonate. , to achieve the effect of improving production efficiency, simple method and saving time

Inactive Publication Date: 2018-12-21
广西南宁桂尔创环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent (CN201110427710.9) a surface treatment method of nano-calcium carbonate for polyvinyl chloride plastisol, using a mixture of stearic acid alkali metal saponification and calcium stearate to modify nano-calcium carbonate to obtain a surface treatment method used in PVC Medium and stable nano-calcium carbonate products, but due to the characteristics of alkali metal stearate saponification and calcium stearate, its high temperature resistance and corrosion resistance are insufficient
A modified nano-calcium carbonate product with excellent performance is obtained, but there are many steps in the method of separating nano-calcium carbonate, and the preparation takes a certain amount of time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Calcium chloride powder, ethanol, water, octylphenol polyoxyethylene ether, hydroxyethyl cellulose, and glyceryl monostearate were prepared in a weight ratio of 4:6:30:12:10:18 to prepare calcium chloride microemulsion;

[0026] (2) Preparation of saturated fatty acid saponification solution: the weight ratio of liquid caustic soda and saturated fatty acid is 1.5:1, heat water to 75°C, add sodium hydroxide, add arachidic acid for saponification reaction after fully dissolving, stir for 22 minutes, and obtain saturated fatty acid saponification solution ;

[0027] (3) Sodium carbonate, water, n-butanol, and saturated fatty acid saponification solution are 5:6:40:8 by weight to prepare calcium carbonate microemulsion;

[0028] (4) Slowly add the calcium carbonate microemulsion to the calcium chloride microemulsion, then add octylal, stir and mix, precipitation occurs; separate 10min with centrifuge 400rpm, obtain modified nanometer calcium carbonate slurry, aldehyde ...

Embodiment 2

[0031] (1) Calcium chloride powder, n-butanol, water, polyoxyethylene lauryl ether, carboxymethyl cellulose, and glyceryl monostearate were prepared in a weight ratio of 5:8:40:10:8:17. calcium microemulsion;

[0032] (2) Preparation of saturated fatty acid saponification solution: the weight ratio of liquid caustic soda and saturated fatty acid is 1:1, heat water to 70°C, add potassium hydroxide, add myristic acid after fully dissolved, and carry out saponification reaction, stir for 22 minutes to obtain saturated fatty acid saponification solution ;

[0033] (3) Sodium carbonate, water, glycerol, and saturated fatty acid saponification liquid are prepared in a weight ratio of 3:5:50:12 to prepare calcium carbonate microemulsion;

[0034] (4) Slowly add the calcium carbonate microemulsion to the calcium chloride microemulsion, then add decanal, stir and mix, precipitation occurs; separate 10min with centrifuge 500rpm, obtain modified nanometer calcium carbonate slurry, aldeh...

Embodiment 3

[0037] (1) Calcium chloride powder, ethylene glycol, water, lauryl polyoxyethylene ether, methyl cellulose, and glyceryl monostearate are prepared by weight ratio 3:7:50:8:11:15 Chlorine Calcium microemulsion;

[0038] (2) Preparation of saturated fatty acid saponification solution: the weight ratio of liquid alkali and saturated fatty acid is 1:1.3, heat the water to 80°C, add potassium hydroxide, add stearic acid for saponification reaction after fully dissolving, stir for 25 minutes, and obtain saturated fatty acid saponification liquid;

[0039] (3) Sodium carbonate, water, ethanol, and saturated fatty acid saponification solution are 4:8:30:10 by weight to prepare calcium carbonate microemulsion;

[0040](4) Slowly add the calcium carbonate microemulsion to the calcium chloride microemulsion, then add undecanal, stir and mix, and precipitate occurs; separate with a centrifuge at 550rpm for 10min to obtain a modified nano-calcium carbonate slurry, aldehyde compounds and a...

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Abstract

The invention discloses a preparation method of modified nano calcium carbonate for PVC automobile primer. The preparation method comprises the steps that calcium chloride powder is added into an alcohol compound, and then water, polyoxyethylene ether, a cellulose derivative and glycerin monostearate are added to prepare calcium chloride microemulsion; sodium carbonate is added into water, and then the alcohol compound and fatty acid saponified liquid are added to prepare calcium carbonate microemulsion; calcium carbonate microemulsion is slowly added into the calcium chloride microemulsion, then a aldehyde compound is added and stirred to be mixed with the liquid, and sediment appears; the sediment is separated by a centrifugal machine, and modified nano calcium carbonate serous fluid isobtained; and the modified nano calcium carbonate serous fluid is dried and smashed, and the surface modified nano calcium carbonate product is obtained. The produced material method is simple and convenient, and has the very good compatibility with PVC. The produced primer has the good thixotropic property, can resist abrasion and chemical corrosion, and has the good stone chip resistance. The primer has the high viscosity when being stored, is easy to spray and level when being coated.

Description

technical field [0001] The invention relates to a surface modification method of nano calcium carbonate, in particular to a preparation method of modified nano calcium carbonate for PVC automobile primer. Background technique [0002] Automotive primer is the first layer of paint applied on the surface of the part, and the primer should have good adhesion to the substrate. The chassis of the car is vulnerable to impact and scratches during driving, which will damage the surface coating and damage the steel plate, and the life of the metal chassis. Therefore, the primer should have excellent corrosion resistance, rust resistance, oil resistance, chemical resistance and water resistance. When spraying, the automotive primer should be easy to spray, low viscosity, good fluidity, high viscosity after spraying, and prevent sagging. The formed paint film also needs to have good mechanical properties such as hardness, gloss, flexibility and stone chip resistance. [0003] Therefo...

Claims

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Application Information

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IPC IPC(8): C09D127/06C09D7/62C09D7/63
CPCC09D127/06C08K2003/265C08K2201/011C08L2205/03C09D7/62C09D7/63C08L71/02C08L1/02C08K13/06C08K9/04C08K3/26C08K5/103
Inventor 戚海冰
Owner 广西南宁桂尔创环保科技有限公司
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