Large-sized synthesized mica pearlescent pigment and preparation method thereof

A technology for synthesizing mica and pearlescent pigments, which is applied in the fields of inorganic pigment treatment, chemical instruments and methods, and pharmaceutical formulations. It can solve the problems of large particle size, small specific surface area, and poor surface activity, and achieve pure color saturation and high refraction. The effect of high efficiency and good weather resistance

Active Publication Date: 2014-01-01
FUJIAN KUNCAI MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a major technical problem in the preparation of large particle size synthetic mica pearlescent pigments, that is, the large particle size synthetic mica powder has a large particle size, small specific surface area, short milling time, and poor surface activity, making the hydrolyzed coating very difficult. Difficult to carry out, when the coating is formed, a large amount of free TiO is produced 2 , which seriously affects the quality of pearlescent pigments, and even does not produce pearlescent effect
Chinese patent CN200410065315.0 uses natural mica as the base material, and prepares large particle size natural mica pearlescent pigments by adding zinc salt salt to decompose the coating. The same method is not suitable for the preparation of large particle size synthetic mica pearlescent pigments; Chinese patent CN200510020568.0 And Chinese patent CN00820062.9 all discloses the preparation method of synthetic mica pearlescent pigment, does not relate to the preparation technology of large particle diameter synthetic mica pearlescent pigment, can not solve the preparation technical problem of large particle diameter synthetic mica pearlescent pigment equally

Method used

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  • Large-sized synthesized mica pearlescent pigment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Weigh d 50 =50μm synthetic mica powder 100g, add 1150ml of reverse osmosis water with a conductivity of 20μs / cm according to the solid-liquid ratio of 1:11.5, and stir until the temperature is 70°C while heating up;

[0030] (2) In the suspension obtained in step (1), add 2 grams of Al per kilogram of synthetic mica powder 3+ meter, that is, adding 20wt% crystalline aluminum chloride (AlCl 3 ·H 2 O) 9 grams of solution, stirred at a constant temperature of 70°C for 10 minutes;

[0031](3) At a temperature of 70°C, adjust the pH value to 1.6 with dilute hydrochloric acid, and feed titanium tetrachloride with a concentration of 4mol / L at a rate of 0.8mol / kg synthetic mica·h (20ml / h) evenly and slowly Add it to the suspension in step (2), and at the same time add dropwise a sodium hydroxide solution with a concentration of 20wt%, so as to keep the pH value constant at about 1.6. When the material is added to the hue of the silver-white pearlescent pigment standard ...

Embodiment 2

[0035] (1) Weigh d 50 =325μm synthetic mica powder 100g, add 825ml of deionized water with a conductivity less than 50μs / cm according to the solid-liquid ratio of 8.25, and stir until the temperature is 80°C while raising the temperature;

[0036] (2) In the suspension obtained in step (1), add 4 grams of Al per kilogram of synthetic mica powder 3+ meter, that is, adding 10wt% crystalline aluminum chloride (AlCl 3 ·H 2 O) 36 grams of solution, stirred at 80°C for 20 minutes;

[0037] (3) At a temperature of 80°C, adjust the pH value to 1.9 with dilute hydrochloric acid, and feed titanium tetrachloride with a concentration of 2.25mol / L at a rate of 0.45mol / kg to synthesize mica·h (20ml / h) evenly and slowly Add it to the suspension in step (2) while adding dropwise a 20% sodium hydroxide solution to keep the pH constant at about 1.9. When the material is added to the hue of the silver-white pearlescent pigment standard sample (for 100g of synthetic mica powder, 0.1mol solubl...

Embodiment 3

[0041] (1) Weigh d 50 =600μm synthetic mica powder 100g, add 500ml of reverse osmosis water with a conductivity of 20μs / cm according to the solid-liquid ratio of 1:5, stir while heating up to a temperature of 90°C;

[0042] (2) In the suspension obtained in step (1), add 6 grams of Al per kilogram of synthetic mica powder 3+ meter, that is, adding a concentration of 30wt% crystalline aluminum chloride (AlCl 3 ·H 2 O) 18 grams of solution, stirred at 90°C for 30 minutes;

[0043] (3) At a temperature of 90°C, adjust the pH value to 2.2 with dilute hydrochloric acid, and feed titanium tetrachloride with a concentration of 0.5mol / L at a rate of 0.1mol / kg to synthesize mica·h (20ml / h) evenly and slowly Add it to the suspension in step (2) while adding dropwise a 20% sodium hydroxide solution to keep the pH constant at about 2.2. When feeding to the standard sample hue of silver-white pearlescent pigment (for 100g of synthetic mica powder, 0.0625mol soluble salt is added at thi...

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Abstract

The invention relates to a large-sized synthesized mica pearlescent pigment, which is characterized in that large-sized synthesized mica powder with d50 being equal to 50 to 600 micrometers is adopted as a substrate, wherein a high-refraction oxide membrane is arranged on the surface of the substrate, the high-refraction oxide membrane is formed by implementing the hydrolysis enveloping adopting soluble salt which can be hydrolyzed into high-refraction oxide as a hydrolysis precursor under the existence of soluble trivalent aluminum salt which is used as a depositing agent. The invention also relates to a preparation method of the large-sized synthesized mica pearlescent pigment. The large-sized synthesized mica pearlescent pigment has strong star-like twinkling property and good decoration effect and can be widely applied to the industries such as cosmetics, synthesized leather, plastics, texture costumes, paint and the like.

Description

technical field [0001] The invention relates to a synthetic mica pearlescent pigment with a large particle size and a preparation method thereof, belonging to the field of inorganic non-metallic effect pigments. Background technique [0002] In recent years, pearlescent pigments based on synthetic mica have gradually gained wide popularity due to their high whiteness (silver white series), bright colors (iridescent and metallic color series), no harmful trace elements, high temperature resistance, and no radioactivity. application. In particular, the large particle size synthetic mica pearlescent pigment with a particle size of 50-1000 μm has a super strong shimmering feeling and has a special decorative effect. In this large particle size range, the inevitable variegated flakes of natural mica seriously affect the quality of mica-based pearlescent pigments; pearlescent pigments based on glass phosphor flakes are limited by their fragility and skin irritation. the scope of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/40C09C3/06C08K9/10C08K3/34C09D7/12C09D5/36A61K8/26
Inventor 杨伦全谢秉昆吴跃金
Owner FUJIAN KUNCAI MATERIAL TECH
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