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Preparation process of mica-based pearlescent pigment with high weather resistance

A pearlescent pigment and preparation technology, which is applied in the treatment of inorganic pigments, fibrous fillers, dyed organic silicon compounds, etc., can solve the problems of increasing production costs, achieve the effects of reducing micropores, low production costs, and ensuring high dispersion

Active Publication Date: 2013-12-04
杭州弗沃德精细化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is only suitable for synthesizing mica, and two coupling agents, epoxy silane and amino silane, need to be added in the post-treatment process, which increases the production cost of the product

Method used

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  • Preparation process of mica-based pearlescent pigment with high weather resistance
  • Preparation process of mica-based pearlescent pigment with high weather resistance
  • Preparation process of mica-based pearlescent pigment with high weather resistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The silver muscovite titanium pearlescent pigment (FWD103) was used as the transparent flake substrate to prepare the pearlescent pigment. Its preparation steps are:

[0045] a. Weigh 40g of silver muscovite titanium pearlescent pigment, put it into the reactor, add 450mL of deionized water, stir and raise the temperature to 75°C, and adjust the pH value to 8.5 with ammonia solution.

[0046] b. Formulate absolute ethanol and methyl orthosilicate to contain SiO 2 For the silicon precursor ethanol mixture with a mass fraction of 14%, 15 g of the silicon precursor ethanol mixture was pumped into the reactor with a constant flow pump, and the addition was completed within 2 hours, and then the reaction was continued for 1 hour to obtain the mother liquor.

[0047] c. Filter the mother liquor, wash 4 times with deionized water, dry in an oven at 100°C for 6 hours, then put the dried pigment back into the reactor, add 450mL of deionized water, stir at a constant speed an...

Embodiment 2

[0053] The silver muscovite titanium pearlescent pigment (FWD103) was used as the transparent flake substrate to prepare the pearlescent pigment. Its preparation steps are:

[0054] a. Weigh 40g of silver muscovite titanium pearlescent pigment, put it into the reactor, add 450mL of deionized water, stir and raise the temperature to 85°C, and adjust the pH value to 9 with ammonia solution.

[0055] b. Formulate absolute ethanol and methyl orthosilicate to contain SiO 2 For the silicon precursor ethanol mixture with a mass fraction of 20%, pump 20 g of the silicon precursor ethanol mixture into the reactor with a constant flow pump, add it within 2 hours, and then continue to react for 1 hour to obtain the mother liquor.

[0056] c. Filter the mother liquor, wash it with deionized water for 4 times, and dry it in an oven at 100°C for 8 hours, then put the dried pigment back into the reactor, add 450mL of deionized water, stir at a constant speed and raise the temperature to ...

Embodiment 3

[0062] The silver muscovite titanium pearlescent pigment (FWD103) was used as the transparent flake substrate to prepare the pearlescent pigment. Its preparation steps are:

[0063] a. Weigh 40g of silver muscovite titanium pearlescent pigment, put it into the reactor, add 450mL of deionized water, stir and raise the temperature to 80°C, and adjust the pH value to 9.5 with ammonia solution.

[0064] b. Formulate absolute ethanol and methyl orthosilicate to contain SiO 2 For the silicon precursor ethanol mixture with a mass fraction of 18%, 15 g of the silicon precursor ethanol mixture was pumped into the reactor with a constant flow pump, and the addition was completed within 2 hours, and then the reaction was continued for 1 hour to obtain the mother liquor.

[0065] c. Filter the mother liquor, wash it with deionized water for 4 times, and dry it in an oven at 100°C for 7 hours, then put the dried pigment back into the reactor, add 450mL of deionized water, stir at a con...

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Abstract

The invention relates to a preparation process of a mica-based pearlescent pigment with high weather resistance. The preparation process comprises the following steps: using metal oxide such as titanium dioxide and ferric oxide to clad the surface of mica with a certain grain size distribution to obtain a base material in a certain series of the pearlescent pigment, using photostable substances such as SiO2, Al2O3 and CeO2 to cover the surface of the base material, performing organic modification on the surface of the pigment by using a silane coupling agent KH570, and then obtaining the mica-based pearlescent pigment with the high weather resistance after suction filtration, washing and drying. The preparation process of the mica-based pearlescent pigment is reasonable in design, simple in operation, low in equipment cost, low in energy consumption, and suitable for large-scale production; the prepared pearlescent pigment is good in color and gloss, and suitable for occasions such as automotive, marine and outdoor decoration which have high weather resistance requirements.

Description

technical field [0001] The invention relates to a preparation process of mica-based pearlescent pigments with high weather resistance, which can prepare mica-based pearl pigments with high weather resistance, and belongs to the category of weather-resistant pearlescent pigments based on a multi-layer inorganic-organic hybrid composite weather-resistant coating process preparation. Background technique [0002] Pearlescent pigments are micropowders formed by chemically depositing one or more layers of metal oxide thin layers on the surface of mica flakes as the base material. They are high-performance materials that increase the added value of products. Compared with other pigments, pearlescent pigments have a special surface structure, higher refractive index and good transparency. In transparent media, pearlescent pigments can create the same effect as pearl luster. At present, pearlescent pigments have been widely used in many fields such as coatings, inks, plastics, prin...

Claims

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Application Information

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IPC IPC(8): C09C1/40C09C3/06C09C3/12
Inventor 周峰蒋汉文周亚军高勇沈艳娥
Owner 杭州弗沃德精细化工有限公司
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