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Nano inorganic composite pigment and preparation method thereof

A nano-inorganic and composite pigment technology, applied in the field of materials, can solve the problems of poor dispersion, poor acid resistance of ordinary iron oxide brown, and limit the development of iron oxide brown, so as to achieve improved protection performance, reduced porosity, and excellent corrosion resistance. Effect

Active Publication Date: 2017-10-24
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Iron oxide pigments mainly include colored pigments such as iron oxide red, iron oxide yellow, iron oxide brown and iron oxide black, and iron oxide brown is widely used. The acid resistance of iron brown is poor, and it starts to change color to form iron oxide red above 500 ° C, and the surface hydrophilic group is less, which leads to poor dispersion, so the development of iron oxide brown is largely limited

Method used

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  • Nano inorganic composite pigment and preparation method thereof
  • Nano inorganic composite pigment and preparation method thereof
  • Nano inorganic composite pigment and preparation method thereof

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Embodiment 1

[0032] This embodiment relates to nano-inorganic composite pigment and its preparation method.

Embodiment 11

[0034] The present embodiment relates to nano-iron oxide brown (γ-Fe 2 o 3 ) as the core, and the nano-inorganic composite pigment whose outer layer is wrapped with silica, the preparation process is as follows figure 1 Specifically, follow the steps below:

[0035] a. Obtaining nano-iron oxide brown (γ-Fe 2 o 3 ) particles: 2.1mmol of FeCl 3 ·6H 2 O was dissolved in 35 mL of ethylene glycol solution, magnetically stirred until dissolved, and then 7.2 mmol of NaAc·3H was added to it 2 O, and then placed in a high-pressure reactor with a volume of 50 mL, reacted at 160 °C for 8 h, and cooled to room temperature naturally. The obtained product was washed several times with deionized water and dried at 60 °C to obtain γ-Fe 2 o 3 particles;

[0036] b. Add 0.10g of γ-Fe 2 o 3 The particles were dispersed in 70mL of ethanol solution with a concentration of 90%, ultrasonically treated at a frequency of 40kHz and a power of 90W for 30min, and the mass of γ-Fe 2 o 3 0.4 ti...

Embodiment 12

[0039] This embodiment relates to a nano-inorganic composite pigment with nano-iron oxide yellow as the core and an outer layer of silicon dioxide, and the specific steps are as follows:

[0040] a. Obtain nano-iron oxide yellow particles with a particle size of 80-120nm:

[0041] Step 1. Add 300mL of FeSO with a concentration of 1moL / L in the three-neck flask 4 Solution, add 16mL of 10moL / L sulfuric acid dropwise under stirring conditions, oxidize with 50mL sodium chlorate solution with a concentration of 1moL / L at about 50°C, and then raise the temperature to 85°C at a constant temperature to completely decompose excess sodium chlorate;

[0042]Step 2: Take 100mL of the solution prepared in Step 1, dilute it with an equal volume of water, add sodium hexametaphosphate and OP-10, and adjust the pH of the solution to 6.8-7.2 with 1moL / L NaOH solution;

[0043] Step 3. Heat up the iron glue prepared in step 2, add 150mL of the solution prepared in step 1 and 3g of iron powder, ...

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Abstract

The invention provides a nano inorganic composite pigment. A nano inorganic pigment is used as a core, and silicon dioxide covers the nano inorganic pigment to form a shell layer, so that the obtained nano inorganic composite pigment is excellent in all properties such as corrosion resistance, dispersivity and compatibility; and furthermore, protection for a matrix substance below a pigment coating is obviously enhanced, and a good basis is provided for subsequent treatment of the pigment coating. The invention further provides a preparation method of the nano inorganic pigment. The preparation process is easy to operate; and no special solvent is used, so that the preparation method is environmentally-friendly and cost-effective, and has a remarkable economical value.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a nano-inorganic composite pigment, and at the same time, the invention also relates to a preparation method of the nano-inorganic composite pigment. Background technique [0002] Among the inorganic pigments, titanium dioxide and iron oxide pigments are the main ones. Among them, iron oxide pigments have a variety of colors, a wide spectrum, good hiding power and tinting power, and controllable particle size. Adding them to coatings can effectively It has the advantages of increasing the density and mechanical properties of the coating, and is widely used in the field of coatings. Iron oxide pigments mainly include colored pigments such as iron oxide red, iron oxide yellow, iron oxide brown and iron oxide black, and iron oxide brown is widely used. The acid resistance of iron brown is poor, and it starts to change color to form iron oxide red above 500 °C, and the surface hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/24C09C1/36C09C3/06
CPCC01P2004/64C01P2006/22C09C1/24C09C1/3661C09C3/063
Inventor 王颖赛田润苏治伟王宏卓刘岩高文涛周兴尚伟伟
Owner GREAT WALL MOTOR CO LTD
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