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Novel multi-layer coating angularly heterochrome interference color pearlescent pigment

A technology of color-dependent and pearlescent pigments, applied in the field of pearlescent pigments, which can solve the problems of large difference in refractive index, inconspicuous color in the transition zone, and low color saturation

Active Publication Date: 2011-02-02
林一中
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pigment prepared by this method has the effect of different colors with the angle, but the color changes in a jumping manner with the change of the viewing angle, and the color of the transition zone between the two color changes is very inconspicuous
This is because the refractive index difference between the adjacent high and low refractive index coatings in the pigment structure is large, and there will be a sudden change in the refractive index when the high refractive index coating transitions to the low refractive index coating, so that the color change in the transition area is different. Obviously, the color saturation is also low, which greatly affects the application of this pigment in various fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 15g of natural muscovite flakes with a particle size of 10-60mum, suspend them in 500ml of deionized water, stir and heat to 80°C. With 15% hydrochloric acid, the pH value of the suspension is adjusted to 4.0, and 10% FeCl3 solution is metered into 285ml concentration, and the pH value of the suspension is kept constant by adding 15% NaOH solution dropwise. After the dropwise addition, continue Stir for 20 minutes.

[0019] The pH of the suspension was adjusted to 8.5 by adding 30% NaOH solution and stirred at constant temperature for a quarter of an hour. Metering 650ml concentration is 10% by weight sodium silicate solution (sodium silicate contains SiO 2 20.5%), and the pH value of the suspension was kept constant by adding 15% hydrochloric acid dropwise. After the dropwise addition was completed, the constant temperature stirring was continued for 40 minutes.

[0020] The pH value of the suspension was adjusted to 4.0 by adding 15% hydrochloric acid solution...

Embodiment 2

[0025] Take 15g of glass flakes (with a particle size of 30-70mum) and suspend them in 350ml of deionized water, stir and heat to 75°C. The pH value of the suspension was adjusted to 2.2 with 15% hydrochloric acid, and 24 ml of TiCl with a concentration of 400 g / L were metered in 4 solution, and keep the pH value of the suspension constant by adding dropwise 32% NaOH solution, after the dropwise addition, continue to stir at constant temperature for 30 minutes.

[0026] The pH of the suspension was adjusted to 8.5 by adding 32% NaOH solution and stirred at constant temperature for a quarter of an hour. Metering of 590ml concentration is a 10% by weight sodium silicate solution (sodium silicate containing SiO 2 20.5%), and the pH value of the suspension was kept constant by adding 15% hydrochloric acid dropwise. After the dropwise addition was completed, the constant temperature stirring was continued for 40 minutes.

[0027] The pH value of the suspension was adjusted to 2....

Embodiment 3

[0033] Take 15g of natural mica flakes (with a particle size of 10-60mum) and suspend them in 400ml of deionized water, stir and heat to 75°C. The pH value of the suspension was adjusted to 2.0 with 15% hydrochloric acid, and 59 ml of TiCl with a concentration of 400 g / L were metered in 4 solution, and keep the pH value of the suspension constant by adding dropwise 32% NaOH solution, after the dropwise addition, continue to stir at constant temperature for 30 minutes.

[0034] The pH of the suspension was adjusted to 8.5 by adding 32% NaOH solution and stirred at constant temperature for a quarter of an hour. Metering of 680ml concentration is a 10% by weight sodium silicate solution (sodium silicate containing SiO 2 20.5%), and the pH value of the suspension was kept constant by adding 15% hydrochloric acid dropwise. After the dropwise addition was completed, the constant temperature stirring was continued for 40 minutes.

[0035] The pH value of the suspension was adjuste...

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Abstract

The invention discloses a novel multi-layer coating angularly heterochrome interference color pearlescent pigment, which takes a transparent or a semitransparent sheet as a substrate. High refractive index coating and low refractive index coating are repeatedly coated on the outer surface of the substrate in sequence in an alternating manner, wherein, the number of the coating is at least three layers; the low refractive index coating is arranged between two high refractive index coatings; intermediate transitional coatings with gradually changed refractive indexes are arranged between the high refractive index coating and the low refractive index coating, and between the low refractive index coating and the high refractive index coating; the intermediate transitional coating is composed of metallic silicate, metallic aluminate and mixture composed of the metallic silicate, the metallic aluminate, high refractive index metallic oxide and low refractive index compound. Because of the existence of the intermediate transition coating, the pigment provided by the invention enables the color-changing transition region color variability to be more clear and obvious, and the color saturation to be higher. The pigment can be used in automobile paint, cosmetic formula, paint, printing ink, plastics and glass industries.

Description

technical field [0001] The invention relates to a pearlescent pigment, in particular to a novel multi-layer coated interference color pearlescent pigment. Background technique [0002] When high-refractive-index metal oxides and low-refractive-index compounds are alternately coated on thin substrates, many different optical effects can be presented by changing the coating material, thickness and structure. Moreover, through appropriate structural design and selection of the thickness of the coating layer, the color change as a visual function can also become intense. With different viewing angles, two or more interference color changes can be presented, forming angle-dependent heterochromatic interference. color pearlescent pigments. [0003] In recent years, a number of patents (JP2000517374, US6656259, US6284034, CN1470569, CN1563210, etc.) have proposed the use of liquid-phase chemical deposition method, relying on high and low refractive index materials alternate multi-...

Claims

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Application Information

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IPC IPC(8): C09C1/28C09C1/00C09C1/40C09C3/00C09C3/06
Inventor 林文广
Owner 林一中
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