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Multi-layer coated effect interference pigment and preparation method thereof

A technology of color-dependent and interference pigments, applied in pigment paste, inorganic pigment treatment, chemical instruments and methods, etc., to achieve the effects of improving gloss and hiding rate, reducing cost, good gloss and hiding rate

Inactive Publication Date: 2006-07-19
SUZHOU TAIZHU TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patented pigment lacks the "hard" luster of earlier metal-based pigments and presents an effective "soft" sheen

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Add 100g of rutile TiO2-coated mica slightly light gold interference pigment (particle size: 10-60μm, TiO2 content: 38%) into 700g mixed acid solution consisting of hydrofluoric acid, sulfuric acid and phosphoric acid , the total concentration is 50%, wherein the weight ratio of hydrofluoric acid: sulfuric acid: phosphoric acid is 2:10:4. After uniform stirring, the temperature was raised to 60° C., and the mixture was stirred at a constant temperature for 10 hours at a low speed. Then the pigment is separated, and then washed and dried to obtain 67g light gold interference color TiO2 flakes. In the original TiO2 interference pigment, about 50% of the mica core was removed.

[0036] Suspend 20g of the TiO2 flakes obtained above in 600ml of deionized water, heat up to 85°C under strong stirring, then adjust the pH of the suspension to 8.5 with dilute lye, and then slowly add it dropwise to the suspension Contain SiO Concentration is 310ml of sodium silicate solution of...

Embodiment 2

[0039] Embodiment 2 (comparative example 1)

[0040] Suspend 20g of rutile TiO2-coated slightly golden mica pigment (particle size 10-60μm, TiO2 content 38%) in 600ml deionized water, heat up to 85°C under strong stirring, and then adjust the pH with lye From positive to 8.5, 310ml of sodium silicate solution containing SiO2 concentration of 58.5g / l was slowly added dropwise to the suspension while maintaining the pH value with 10% hydrochloric acid. After the addition, stir for another 30 minutes, then the pH value of the suspension is adjusted to 3.5, and the concentration is 9.5% FeCl3 solution is added dropwise to the suspension, while maintaining the pH value of the suspension with dilute lye, the FeCl3 solution is always The amount added is 215ml. After the dropwise addition, the mixture was stirred at constant temperature for 30 minutes.

[0041] After coating, the pigment is separated by filtration, fully washed with deionized water, then dried at 110°C, and finally ...

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Abstract

The related multilayer-coated interference dye varied along the visual angle uses metal oxide sheet as carrier with part substrate or core removed, and is constructed by alternative coating metal oxides with low or high reflective index. This invention has special optical effect and can be used to vehicle paint, cosmetic formula and glass, etc.

Description

Technical field: [0001] The invention relates to a pigment, in particular to a multilayer coated angle-dependent color interference pigment and a preparation method thereof. Background technique: [0002] The metal oxide is coated on the flake substrate. When the coating reaches a certain thickness, when the light hits the surface of the coating, a part of the incident light wave is reflected, and a part of the light is transmitted through the coating to the surface of the next layer, and another light wave is generated. The reflection and transmission of light will produce the phenomenon of "interference" of light. If n represents the refractive index of the coating, d is the thickness of the coating, then nd is the optical thickness of the coating. Some reflected light [λ=2 / N nd (N is a positive integer, λ is the wavelength of reflected light)] is weakened by interference, and some reflected light [λ=(4 / (2N-1)) nd] is weakened enhanced. [0003] When metal oxides with a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C3/00C09C1/28C09D17/00C09D11/02C08K3/00A61K8/19C03C25/42C09D11/037
Inventor 林一中
Owner SUZHOU TAIZHU TECH DEV