Surface treatment method of nano calcium carbonate for impact-resistant automobile chassis coating

A technology of nano-calcium carbonate and automobile chassis, applied in inorganic pigment treatment, calcium carbonate/strontium/barium, nanotechnology for materials and surface science, etc., can solve the problem of low impact resistance and moisture absorption, which affects the appearance of automobile chassis and other problems to achieve the effects of regular crystal morphology, improved stability, and stable nucleation rate

Active Publication Date: 2021-04-30
GUANGXI HUANA NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nano-calcium carbonate particles prepared by the method of the present invention are regular in appearance, have the advantages of good stability, good rheology, strong impact resistance, and low moisture absorption capacity. Excellent impact resistance and anti-sag performance, and can also solve the problem of anti-yellowing of the treatment agent and affecting the appearance of the car chassis

Method used

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  • Surface treatment method of nano calcium carbonate for impact-resistant automobile chassis coating
  • Surface treatment method of nano calcium carbonate for impact-resistant automobile chassis coating
  • Surface treatment method of nano calcium carbonate for impact-resistant automobile chassis coating

Examples

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Effect test

Embodiment 1

[0035] A surface treatment method of nano-calcium carbonate for impact-resistant automobile chassis coatings, comprising the steps of:

[0036] S1: Dilute milk of lime to obtain a slurry, adjust the specific gravity to 1.060, control the temperature at 23°C, and place the slurry in a carbonization tower for carbonation;

[0037] S2: Introducing CO into the slurry 2 , to regulate CO 2 The concentration is 33%, the volume flow rate is 2.0m 3 / h carry out carbonation reaction, measure electrical conductivity by instrument and add calcium carbonate quality to be 1.5% crystal formation control agent at the lowest point of gelation conductivity at the initial stage of carbonization, and described crystal formation control agent is 3:2:5 by mass ratio Composed of sucrose, sodium polyacrylate and barium chloride, stirred and reacted until PH≤7 to obtain calcium carbonate suspension;

[0038] S3: The calcium carbonate suspension is heated to 75°C for lipophilic surface treatment, stir...

Embodiment 2

[0041] A surface treatment method of nano-calcium carbonate for impact-resistant automobile chassis coatings, comprising the steps of:

[0042] S1: Dilute milk of lime to obtain a slurry, adjust the specific gravity to 1.050, control the temperature to 20°C, and place the slurry in a carbonization tower for carbonation;

[0043] S2: Introducing CO into the slurry 2 , to regulate CO 2 The concentration is 30%, the volume flow rate is 1.5m3 / h to carry out the carbonation reaction, the conductivity is measured by the instrument and the crystal form control agent is added at the lowest point of the gelation conductivity in the early stage of carbonization, and the mass ratio of the crystal form control agent is 2: 1:3 composition of sucrose, sodium polyacrylate and magnesium chloride, stirred and reacted until PH≤7 to obtain calcium carbonate suspension;

[0044] S3: The calcium carbonate suspension is warmed up to 75°C for lipophilic surface treatment, stirred and added with so...

Embodiment 3

[0047] A surface treatment method of nano-calcium carbonate for impact-resistant automobile chassis coatings, comprising the steps of:

[0048] S1: Dilute milk of lime to obtain slurry, adjust the specific gravity to 1.070, control the temperature at 25°C, and place the slurry in a carbonization tower for carbonation;

[0049] S2: Introducing CO into the slurry 2 , to regulate CO 2 The concentration is 33%, the volume flow rate is 2.0m 3 / h carries out the carbonation reaction, measures electrical conductivity by instrument and adds the crystal formation control agent that calcium carbonate dry basis weight is 1.7% at the lowest point of carbonization initial stage gelling conductivity, and described crystal formation control agent is 2:3 by mass ratio : 5 sucrose, sodium polyacrylate and magnesium chloride form, stirring reaction until PH≤7, obtain calcium carbonate suspension;

[0050] S3: The calcium carbonate suspension is heated to 80°C for lipophilic surface treatment...

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Abstract

The invention discloses a surface treatment method of nano calcium carbonate for an impact-resistant automobile chassis coating, which comprises the following steps of diluting lime milk to obtain slurry, regulating the specific gravity, and carbonating the slurry in a carbonating tower, measuring conductivity through an instrument, adding a crystal form control agent at the lowest point of gelatinization conductivity at the initial stage of carbonization, and stirring to react until the pH value is less than or equal to 7 to obtain calcium carbonate suspension, carrying out oleophylic surface treatment on the calcium carbonate suspension, stirring, and adding a compound treatment agent consisting of a sodium stearate saponification solution and flaxseed gum, polyhexamethylene glycol, sodium dodecyl benzene sulfonate and isopropyl triisostearoyl titanate for surface treatment, and carrying out filter pressing, microwave vacuum drying and sieving to obtain the nano calcium carbonate. The nano calcium carbonate particles prepared through the method are regular in morphology, have the advantages of being good in stability, good in rheological property, high in impact resistance, low in moisture absorption capacity and the like, and can improve the impact resistance and sagging resistance of PVC paste when applied to filling of the automobile chassis coating PVC paste.

Description

technical field [0001] The invention relates to the field of surface treatment of inorganic nanomaterials, in particular to a surface treatment method of nano calcium carbonate for impact-resistant automobile chassis coatings. Background technique [0002] In recent years, with the continuous development of new anti-stone chip coatings, nano-calcium carbonate has been used as a modifier and filler in different systems of anti-stone chip coatings. Nano-calcium carbonate has the characteristics of quantum size effect, surface effect, highly activated state of surface atoms, and high interfacial interaction with polymers. After being applied to anti-stone impact coatings for automobile chassis, the coatings can be reinforced and transparent. It can effectively improve the impact resistance, adhesion and other indicators of anti-stone chip coatings, and as a cheap filler, nano-calcium carbonate can greatly reduce the production cost of automotive chassis coatings. . PVC paste ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/08C09C3/10C09C3/04C01F11/18B82Y40/00B82Y30/00C09D127/06C09D7/62
CPCB82Y30/00B82Y40/00C01F11/18C01F11/185C01P2004/03C08K2003/265C08K2201/011C09C1/021C09C3/006C09C3/043C09C3/08C09C3/10C09D127/06C09D7/62C08K9/04C08K9/08C08K3/26C08K9/10
Inventor 杨昭开朱勇莫小叶黄媛珍詹庆铷刘燕玲
Owner GUANGXI HUANA NEW MATERIALS TECH CO LTD
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