CN201971776U

CN201971776U - Coarse-grain-diameter pearlescent pigment capable of being coated with metal oxides with high refractive index

Info

Publication number: CN201971776U
Application number: CN2010206778714U
Authority: CN
Inventors: 侯清华; 陈俊; 黄汝发; 李翔
Original assignee: GUANGDONG VOLOR PEARL PIGMENT CO Ltd
Current assignee: GUANGDONG VOLOR PEARL PIGMENT CO Ltd
Priority date: 2010-12-23
Filing date: 2010-12-23
Publication date: 2011-09-14
Anticipated expiration: 2020-12-23

Abstract

The utility model discloses coarse-grain-diameter pearlescent pigment capable of being coated with metal oxides with a high refractive index. A flaky substrate of which the grain diameter is between 500 microns and 1500 microns or is more than 1500 microns is used as a basal piece. Meanwhile, the surface of a flaky substrate layer is coated with a basic oxide layer. Further, the surface of the basic oxide layer is coated with a layer of metal oxide layer or a plurality of layers of metal oxide layer. According to the coarse-grain-diameter pearlescent pigment capable of being coated with the metal oxides with the high refractive index, the surface of the substrate is processed by modification, and the adsorption capacity of the surface of the substrate is increased, so that the adsorptive capacity of the substrate to other metal oxides is reinforced; then, the aim of successfully coating other metal oxides with the high refractive index is achieved; and in this way, the high-twinkle pearlescent pigment with coarse grain diameters can be further obtained.

Description

A kind of coarse grain footpath pearly pigment that coats the metal oxide of high refractive index

Technical field

The utility model relates to a kind of pearly pigment, relates to the pearly pigment of the oxide coated structure of a kind of coarse grain footpath flat substrates specifically.

Background technology

The principle that pearly pigment produces pearl effect is incident light process multiple reflection, refraction, produces the interference of light effect at flat surface, thereby shows the color effects as the pearl or as the iris.People extract guanine from natural fish scale to make pearly pigment the earliest, still since this method output little, cost an arm and a leg, so people studied and adopt the method for synthetic to make pearly pigment afterwards.Wherein a kind of pearly pigment is direct synthesizing flaky mineral compound, and as pearl white and white lead carbonate, and another kind of pearly pigment is to coat one or more layers oxide compound on the surface of flat substrates such as natural or synthetic mica, to produce pearl effect.

The pearly pigment of flat substrates series is because the difference of particle diameter can make the light of reflected light and refracted light have different luster effects, and for example, the pearly pigment of small particle size can produce the gloss as the tiffany, and the pearly pigment of big particle diameter can produce the gloss of flicker.So, can produce the pearly pigment of various luster effects according to this rule, such as the higher sparkling luster of needs, just need use the flat substrates in coarse grain footpath more etc.

Yet, when the raising of the particle diameter of flat substrates such as mica, its surface-area reduces, surface active can also significantly reduce thereupon, and then influenced of the absorption of flat substrates surface to metal oxide particle, make metal oxide be difficult in substrate surface and form film, thereby make the pearly pigment reduction and lost the pearl effect of glimmering.Usually, the way of existing solution is flat substrates to be carried out acid boil and pre-treatment such as soda boiling, and increasing the surfactivity of base material, but its effect is unsatisfactory, does not reach required high flicker effect.

The utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of and has done the modification processing at substrate surface, has increased the novel macreous pigment of its surperficial adsorptive power.

The utility model is achieved by the following technical programs:

A kind of coarse grain footpath pearly pigment that coats the metal oxide of high refractive index, by particle diameter between the 500-1500 micron or particle diameter at the flat substrates layer more than 1500 microns as substrate, simultaneously be coated with basic oxide layer at the flat substrates laminar surface, further, be coated with one or more layers metal oxide layer at the base oxide laminar surface, basic oxide layer is used to increase the surfactivity of base material, further to coat the metal oxide layer of other high refractive index at the flat substrates laminar surface, the coating quantity of metal oxide layer is decided according to the actual requirements.

Wherein, the flat substrates layer is natural mica, synthetic mica, glass flake etc.; Basic oxide layer is SiO ₂, Al ₂O ₃Or their mixture, mixture; Metal oxide layer is TiO ₂, Fe ₂O ₃Or their mixture, mixture.

The utility model usefulness is:

The utility model has been done the modification processing at substrate surface, increased its surperficial adsorptive power, and then strengthened the adsorptive power of base material to other metal oxide, reach the purpose of the metal oxide that coats other high refractive index smoothly then, so just can further obtain the high flaring pearlescent pigment in coarse grain footpath.

Description of drawings

Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail:

Fig. 1 is the structural representation of the utility model one embodiment.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

As shown in Figure 1, a kind of coarse grain footpath pearly pigment that coats the metal oxide of high refractive index, with particle diameter between the 500-1500 micron or particle diameter be substrate at the flat substrates layer more than 1500 microns 1, simultaneously flat substrates layer 1 surface alternately coats basic oxide layer 2 and metal oxide layer 3 successively.

Wherein, flat substrates layer 1 is natural mica, synthetic mica, glass flake etc.; Basic oxide layer 2 is SiO ₂, Al ₂O ₃Or their mixture, mixture; Metal oxide layer 3 is TiO ₂, Fe ₂O ₃Or their mixture, mixture.

In the middle of concrete operating process, the substrate of certainweight umber is dispersed in makes aqeous suspension in the water, and aqeous suspension stirred and control its temperature and pH value, simultaneously, with SiO ₂, Al ₂O ₃Soluble salt be made into certain quantity solution A, this solution A is slowly added in the aqeous suspension, and keeps pH value stable with sodium hydroxide solution or hydrochloric acid soln, control clad ratio to 4% had both been finished the coating of base oxide to 6%.

Further, keep temperature, the PH of existing solution, and stir and obtained new suspension B in 30 minutes, simultaneously, with TiO ₂, Fe ₂O ₃Soluble salt be mixed with certain quantity solution C, solution C is slowly added among the suspension B, and keep pH value stable with sodium hydroxide solution, the control clad ratio makes coating reach needed gloss, promptly stop to add solution C and sodium hydroxide solution, promptly finished the coating of metal oxide this moment.

At last, will have solution stirring now 30 minutes, and make suspension D, and with suspension D, filter, wash, dry, at high temperature calcining promptly forms last needed pearly pigment.Wherein, the metal oxide layer 3 that is coated is according to the TiO that adds ₂, Fe ₂O ₃Difference, can produce the pearly pigment with flicker metal effect of silvery white, gold, bronze, reddish brown, different colours such as wine is red.

Claims

1. the coarse grain of the metal oxide that can coat high refractive index footpath pearly pigment, comprise particle diameter between 500 microns to 1500 microns or particle diameter at the flat substrates layer (1) more than 1500 microns, it is characterized in that being coated with basic oxide layer (2) on flat substrates layer (1) surface, simultaneously, be coated with one or more layers metal oxide layer (3) on basic oxide layer (2) surface.

2. the coarse grain footpath pearly pigment that coats the metal oxide of high refractive index according to claim 1 is characterized in that described flat substrates layer (1) is a kind of of natural mica, synthetic mica or glass flake.