WO2018194284A1 - 복합 백색 안료 - Google Patents
복합 백색 안료 Download PDFInfo
- Publication number
- WO2018194284A1 WO2018194284A1 PCT/KR2018/003567 KR2018003567W WO2018194284A1 WO 2018194284 A1 WO2018194284 A1 WO 2018194284A1 KR 2018003567 W KR2018003567 W KR 2018003567W WO 2018194284 A1 WO2018194284 A1 WO 2018194284A1
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- Prior art keywords
- white pigment
- white
- thickness
- substrate
- high refractive
- Prior art date
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/0015—Pigments exhibiting interference colours, e.g. transparent platelets of appropriate thinness or flaky substrates, e.g. mica, bearing appropriate thin transparent coatings
- C09C1/0024—Pigments exhibiting interference colours, e.g. transparent platelets of appropriate thinness or flaky substrates, e.g. mica, bearing appropriate thin transparent coatings comprising a stack of coating layers with alternating high and low refractive indices, wherein the first coating layer on the core surface has the high refractive index
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- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/0081—Composite particulate pigments or fillers, i.e. containing at least two solid phases, except those consisting of coated particles of one compound
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- C09C2200/308—Total thickness of the pigment particle
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C2210/00—Special effects or uses of interference pigments
- C09C2210/60—Interference with laser-light, laser markable pigments
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C2220/00—Methods of preparing the interference pigments
- C09C2220/10—Wet methods, e.g. co-precipitation
- C09C2220/106—Wet methods, e.g. co-precipitation comprising only a drying or calcination step of the finally coated pigment
Definitions
- the present invention relates to a pigment production technology, and more particularly to a composite white pigment that can exhibit high gloss and whiteness.
- White pigments have been used for aesthetic effects in various fields. For example, it is used for wallpaper, flooring, plastic molding, leather coating, silk printing, offset printing, painting of home appliances, and ceramic applications.
- cosmetics are used in various color cosmetics, such as lipstick, nail polish, hair gel, eye shadow, lip closed. Pearl pigments are also used in automotive interior and exterior painting, construction, and ship paints where high weatherability is required.
- a typical white pigment has a structure in which a plate substrate such as mica having a thickness of about 350 to 700 nm is coated with a metal oxide such as TiO 2 having a thickness of 60 to 100 nm.
- Patent Document 1 Korean Unexamined Patent Publication No. 10-2012-0107013 (Published September 27, 2012)
- Composite white pigment according to an embodiment of the present invention for achieving the above object is a first white pigment comprising a substrate and a white metal oxide layer formed on the substrate; And a second white pigment comprising a substrate and a white metal oxide layer formed on the substrate, the second white pigment having a color difference value different from that of the first white pigment.
- the composite white pigment according to the first embodiment of the present invention is a mixture of a substrate and a first white pigment and a second white pigment each comprising a white metal oxide layer formed on the substrate,
- the minimum thickness of the metal oxide is 50 nm or more larger than the maximum thickness of the metal oxide layer of the first white pigment.
- a substrate and a first white pigment and a second white pigment each containing a white metal oxide layer formed on the substrate are mixed with each other.
- the minimum thickness is 50 nm or more greater than the maximum thickness of the first white pigment.
- the first white pigment may include a white metal oxide layer having a thickness of 30 to 80 nm
- the second white pigment may include a white metal oxide layer having a thickness of 60 to 100 nm.
- a substrate and a first white pigment and a second white pigment each including a white metal oxide layer formed on the substrate are mixed, and the white metal oxide layer is A first high refractive layer formed on the surface of the substrate and comprising TiO 2 ; A low refractive layer formed on the first high refractive layer and including a material having a lower refractive index than TiO 2 ; And a second high refractive layer formed on the low refractive layer and including TiO 2 , wherein the thickness of the first high refractive layer T1 and the thickness of the second high refractive layer are T2. It is characterized by 2T1> T2 ⁇ T1 and 3T1 ⁇ T2 ⁇ 2T1 in the second white pigment.
- the composite white pigment may include at least two groups of substrates having a thickness difference of 50 nm or more.
- first high refractive layer and the second high refractive layer may include TiO 2 having a rutile structure.
- the low refractive layer may include one or more of SiO 2 and MgO ⁇ SiO 2.
- the substrate may be selected from natural mica, synthetic mica, glass flakes and alumina flakes.
- the composite white pigment according to the present invention may be included as an interference pigment in various articles such as cosmetics, paints and plastics.
- a mixture having a specific thickness and a metal oxide layer having a specific thickness as a result of mixing white pigments having different color difference values, can realize a complex white pigment having excellent gloss and whiteness. have.
- Figure 2 schematically shows a white pigment according to another embodiment 3 of the present invention.
- Figure 3 shows an optical microscope (500x magnification) photograph of the white pigment according to Example 3.
- Figure 1 schematically shows a white pigment that can be applied to the present invention.
- the illustrated white pigment has a structure in which a white metal oxide layer 120, such as a TiO 2 layer, is formed on a substrate 110.
- a white metal oxide layer 120 such as a TiO 2 layer
- Figure 2 schematically shows another white pigment that can be applied to the present invention.
- the illustrated white pigment has a multi-layer white oxide layer, ie, a first high refractive layer 220 such as a lower TiO 2 layer, formed on a substrate 210, and a low refractive layer such as a SiO 2 layer thereon. 230 and a second high refractive index layer 240 such as an upper TiO 2 layer is formed.
- a first high refractive layer 220 such as a lower TiO 2 layer
- a low refractive layer such as a SiO 2 layer thereon.
- 230 and a second high refractive index layer 240 such as an upper TiO 2 layer is formed.
- the gloss can be improved, which is more preferable.
- a white pigment according to the present invention may include a substrate 110 and 210 and at least one white metal oxide layer 120 (220 to 240) formed on the substrate 110 and 210. Include.
- the white metal oxide actually has a form covering the entire surface of the substrate, but for the sake of simplicity, in FIG. 1 and FIG. 2, the white metal oxide layer is illustrated as being formed on the substrate.
- Substrates 110 and 210 may be selected from natural mica, synthetic mica, glass flakes and alumina flakes.
- the substrate is preferably a plate-like substrate, but spherical substrates may also be used.
- the longitudinal length of the substrate (110, 210) may be about 5 ⁇ 600 ⁇ m.
- the second high refractive layer 240 from the first high refractive layer 220 may be formed only once in that order, and may be repeatedly formed two or more times in that order as necessary. Can be.
- an additional coating layer may be further formed between the respective coating layers, and a protective coating layer may be further formed on the uppermost second high refractive layer 240 to improve weather resistance.
- a pretreatment layer using tin chloride (SnCl 4 ) or the like may be further formed before forming the white metal oxide layer.
- the first high refractive layer 220 is formed on the surface of the substrate 210 and includes TiO 2 .
- the upper second high refractive layer 240 becomes the main layer of the white implementation, and the lower first high refractive layer 220 contributes to higher whiteness.
- the thickness of the first high refractive layer 220 may be 30 to 90 nm, but is not limited thereto.
- TiO 2 included in the first high refractive layer 220 and the second high refractive layer 240 may have a rutile or anatase structure, and more preferably, a rutile structure. In the case of TiO 2 having a rutile structure, gloss and stability are superior to TiO 2 having an anatase structure.
- the first high refractive index layer and the second high refractive index layer including TiO 2 having a rutile structure may be formed by pretreating the surface of the substrate with a tin compound such as SnCl 4 and then coating TiO 2 with TiCl 4 or the like.
- the low refractive layer 230 is formed on the first high refractive layer 220.
- the low refractive layer 230 is positioned between the first high refractive layer 220 and the second high refractive layer 240 to form an optical interference structure, thereby contributing to the improvement of white intensity.
- the low refractive layer may include at least one of SiO 2 and MgO.SiO 2 .
- the second high refractive layer 240 is formed on the low refractive layer 230.
- the second high refractive layer 240 is preferably equal to or larger than the thickness of the first high refractive layer 220 below. That is, when the thickness of the first high refractive layer is T1 and the thickness of the second high refractive layer is T2, it is preferable that T2? The reason is that the thicker the first high refractive index layer, the lower the whiteness is, so that it is difficult to realize white color.
- the first high refractive layer and the second high refractive layer may be formed from TiCl 4 under strongly acidic conditions of pH 3 or less.
- the low refractive layer may be formed from SiO 2 or MgO.SiO 2 . More specifically, SiO 2 or MgO ⁇ SiO 2:00 The addition maintaining the neutral condition of pH 6 ⁇ 8 and, SiO 2 or MgO ⁇ SiO 2 after the input may be formed in a manner to maintain the strongly acidic conditions of pH 3 or less have.
- the composite white pigment according to the present invention is a mixture of a first white pigment and a second white pigment.
- the first white pigment comprises a substrate and a white metal oxide layer formed on the substrate.
- the second white pigment comprises a substrate and a white metal oxide layer formed on the substrate, and has a color difference value different from that of the first white pigment.
- the minimum thickness of the white metal oxide layer of the second white pigment is 60 nm or more thicker than the maximum thickness of the white metal oxide layer of the first white pigment.
- the thickness of the white metal oxide layer may vary, for example, about 80 nm, 120 nm, 140 nm, 160 nm, and the tone is slightly different depending on the thickness of these white metal oxide layers.
- the white metal oxide layer included in the first white pigment has a thickness of 60 to 100 nm
- the white metal oxide layer included in the second white pigment is a white metal oxide of the first white pigment, such as 120 to 260 nm thick. 60 nm thicker than the maximum thickness of the layer. Those with different white tones can be mixed to achieve higher whiteness.
- the composite white pigment according to the second embodiment of the present invention is, for example, in the first white pigment, when the thickness of the substrate is 200 ⁇ 250nm, when the thickness of the white metal oxide layer is 60 ⁇ 100nm, the green tone of It becomes white.
- the second white pigment when the thickness of the substrate is 300 ⁇ 350nm, when the thickness of the white metal oxide layer is 60 ⁇ 100nm, it exhibits a red tone.
- the white pigment of the green tone and the white pigment of the red tone are mixed, the mixed color effect may be exerted to improve the whiteness as compared with the green tone white pigment or the red tone white pigment.
- a white pigment having a thickness of about 60 nm and a white pigment having a thickness of about 100 nm may be mixed.
- the minimum thickness of the substrate of the second white pigment is 50 nm or more larger than the maximum thickness of the metal oxide layer of the first white pigment.
- the substrate included in the first white pigment has a thickness of 200 to 250 nm
- the substrate included in the second white pigment is 50 nm or more larger than the maximum thickness of the substrate of the first white pigment, such as 300 to 350 nm thick.
- the white tones are different, and by mixing them, higher whiteness can be realized.
- the green tone becomes white.
- the second white pigment when the thickness of the white metal oxide layer is about 80nm, when the thickness of the substrate is 300 ⁇ 350nm, the red tone is white.
- the white pigment of the green tone and the white pigment of the red tone are mixed, the mixed color effect may be exerted to improve the whiteness as compared with the green tone white pigment or the red tone white pigment.
- the composite white pigment according to the third embodiment of the present invention is a preferred example of the composite white pigment according to the second embodiment, wherein the first white pigment and the second white pigment are mixed, each of which is shown in FIG. 2. Has a structure.
- the thickness of the second high refractive layer 240 is the thickness of the first high refractive layer 220. It may be 1 to 2 times larger than (1 ⁇ T2 ⁇ 2). In this case, green tones of white can be achieved at a specific substrate thickness. Alternatively, the thickness of the second high refractive layer 350 may be two to three times greater than the thickness of the first high refractive layer 320 ((2 ⁇ T2 ⁇ 3). White color can be realized If the thickness of the substrate is different, the tone may be slightly changed, and thus, white pigments of various tones can be realized by adjusting the thickness ratio of the second high refractive layer to the thickness of the first high refractive layer.
- the thickness of the second high refractive layer 350 and the white pigment having a thickness of 1 to 2 times larger than that of the first high refractive layer 320 and the second high refractive layer 350 are first White pigments 2 to 3 times larger than the thickness of the high refractive layer 320 may be mixed at about 80:20 to 20:80 by weight ratio. In this case, while having high glossiness, excellent whiteness can be exhibited.
- the composite white pigment may include at least two groups of substrates having a thickness difference of 50 nm or more.
- the white tone is changed according to the thickness of the substrate, and the white metal oxide layer of the same substrate thickness and the same material
- the inventors of the present invention have applied a combination of these white pigments having different white tones, resulting in a mixed white color.
- This mixed white could exhibit high gloss and high whiteness.
- the first white pigment and the second white pigment may each contain 20% by weight or more. That is, since all of the white pigments of different tones are included in a predetermined amount or more, the reliability of the high glossiness and the high whiteness can be improved.
- the method for preparing a white pigment according to the present invention may include preparing a slurry in which a substrate is dispersed, and forming a high refractive layer on the surface of the substrate dispersed in the slurry. And, in the structure shown in Figure 2, preparing a slurry in which the substrate is dispersed, forming a first high refractive layer on the surface of the substrate dispersed in the slurry, and a low refractive layer on the first high refractive layer And forming a second high refractive layer on the low refractive layer.
- a method using a substrate of various thicknesses in the slurry preparation step may be used.
- the first white pigment and the second white pigment are prepared by varying the concentration of the TiO 2 precursor solution (eg, TiCl 4 solution) introduced into the slurry or by changing the titration time. , A method of mixing them may be used.
- TiO 2 precursor solution eg, TiCl 4 solution
- the composite white pigment according to the present invention has excellent white aesthetics, and thus can be applied to products such as paints, plastics, and cosmetics.
- TiCl 4 solution TiCl 4 content 33% by weight
- TiCl 4 content 33% by weight
- the obtained intermediate product was calcined at 800 ° C. for 12 minutes to obtain a white pigment powder.
- TiCl 4 solution TiCl 4 content 33% by weight
- TiCl 4 content 33% by weight
- the obtained intermediate product was calcined at 800 ° C. for 12 minutes to obtain a white pigment powder.
- TiCl 4 solution TiCl 4 content 33% by weight
- TiCl 4 content 33% by weight
- the intermediate product obtained was then calcined at 800 ° C. for 12 minutes to give a green pigmented white pigment powder.
- TiCl 4 solution TiCl 4 content 33% by weight
- TiCl 4 content 33% by weight
- the obtained intermediate product was calcined at 800 ° C. for 12 minutes to obtain a red pigmented white pigment powder.
- Example 2 White powders obtained by the methods according to Production Examples 2-1 and 2-2 were mixed at a weight ratio of 1: 1 to obtain a white pigment powder. This is referred to as Example 2.
- TiCl 4 solution TiCl 4 content 33% by weight
- TiCl 4 content 33% by weight
- the intermediate product obtained was then calcined at 800 ° C. for 12 minutes to give a white pigment powder with some Green tone.
- TiCl 4 solution TiCl 4 content 33% by weight
- TiCl 4 content 33% by weight
- the intermediate product obtained was then calcined at 800 ° C. for 12 minutes to give a white pigment powder with some Red tone.
- White powder obtained by the method according to Production Examples 3-1 and 3-2 was mixed at a weight ratio of 1: 1 to obtain a white pigment powder. This is called example 3.
- White powders were obtained by the same method as Preparation Example 3-1 and Preparation Example 3-2, except that the plate-shaped alumina flakes having a thickness of 200 nm to 250 nm were used instead of the synthetic mica flakes (Manufacture Example 4-1, Preparation Example 4-2). , By mixing in a weight ratio 1: 1 to obtain a white pigment powder.
- Table 1 shows the color difference values (a *, b *) of the white pigments according to Preparation Examples 3-1, 3-2 and 3-3, and Preparation Examples 4-1, 4-2 and 4-3.
- Table 2 shows the color difference values (a *, b *) of the white pigments according to Comparative Example 1 and Examples 1 to 4. Color difference value was measured by Konika Minolta Chroma meter CR-400 D65, a * is the degree of red, b * is the degree of yellow, ⁇ a *, ⁇ b * is Comparative Example Reference Example 1 The color difference change value of ⁇ 4 and the color difference change value of Example 2 reference example 4 are shown.
- Preparation Examples 3-1 and 3-2 can be seen that when the substrate is only a substrate of a certain thickness, a high saturation and low incidence of color mixing to obtain a white powder having a certain specific tone. Mixing powders of different substrate thickness can control the appearance of specific tones of white powder.
- Preparation Example 3-1 is a white powder with some green tones
- Preparation Example 3-2 is measured as a white powder with some red tones. It can be seen that by mixing the two powders, the mixture becomes colored, thereby obtaining a whiter powder having a * and b * values closer to zero.
- Example 4 it can be seen that the powder having a slight green tone and the powder having a red tone are mixed to obtain a whiter powder having a * and b * values close to zero.
- Comparative Example 1 is a general white pearl pigment structure using a substrate of a certain thickness.
- Example 1 powders having different thicknesses of the metal oxide layer were mixed with the same substrate as Comparative Example 1, thereby producing a white powder using a mixed color.
- Example 2 when compared with Comparative Example 1, it can be seen that the change in ⁇ b * value is relatively small, and thus the whiteness is better as the blue tone decreases.
- Example 3 the gloss is slightly increased compared to Comparative Example 1, and the change in the ⁇ a *, ⁇ b * values is relatively small, indicating that the whiteness is better.
- Example 4 compared with Comparative Example 1, the gloss slightly increased, and the change in ⁇ a *, ⁇ b * values was relatively small, and thus the whiteness was improved. In addition, in the case of Example 4, the gloss is slightly increased compared to Example 2, and the change in ⁇ a *, ⁇ b * values is relatively small, indicating that the whiteness is better.
- Example 3 The following is a description of an application example in which the white pigment obtained in Example 3 is used in paints, plastics, inks and cosmetics.
- the paint was exposed to air at 40 ° C. for 30 minutes and heated for curing at 130 ° C. for 30 minutes.
- Polyethylene resin (pellet) 70 parts by weight
- Zinc Stearate 0.2 parts by weight
- Liquid paraffin 0.1 part by weight
- the pellets containing the composition were dry blended and extruded.
- the following is a lip-tin cosmetic composition.
- Lipstick was formed from the composition.
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Abstract
Description
Claims (12)
- 기질과, 상기 기질 상에 형성되는 백색 금속 산화물층을 포함하는 제1 백색 안료; 및기질과, 상기 기질 상에 형성되는 백색 금속 산화물층을 포함하며, 상기 제1 백색 안료와는 상이한 색차계 값을 갖는 제2 백색 안료를 포함하는 것을 특징으로 하는, 복합 백색 안료.
- 제1항에 있어서,상기 제2 백색 안료의 기질의 최소 두께가 상기 제1 백색 안료의 기질의 최대 두께보다 50nm 이상 큰 것을 특징으로 하는, 복합 백색 안료.
- 제2항에 있어서,상기 제1 백색 안료는 두께가 200~250nm인 기질을 포함하고, 상기 제2 백색 안료는 두께가 300~350nm인 기질을 포함하는 것을 특징으로 하는, 복합 백색 안료.
- 제1항에 있어서,상기 백색 금속 산화물층은상기 기재 표면에 형성되며, TiO2를 포함하는 제1 고굴절층;상기 제1 고굴절층 상에 형성되며, TiO2보다 굴절률이 낮은 물질을 포함하는 저굴절층; 및상기 저굴절층 상에 형성되며, TiO2를 포함하는 제2 고굴절층;을 포함하는 것을 특징으로 하는, 복합 백색 안료.
- 제4항에 있어서,상기 제1 고굴절층의 두께를 T1이라 하고 상기 제2 고굴절층의 두께를 T2라 할 때, T2>T1인 것을 특징으로 하는, 복합 백색 안료.
- 제1항에 있어서,상기 제2 백색 안료의 백색 금속 산화물층의 최소 두께가 상기 제1 백색 안료의 백색 금속 산화물층의 최대 두께보다 60nm 이상 큰 것을 특징으로 하는, 복합 백색 안료.
- 제6항에 있어서,상기 제1 백색 안료는 두께가 30~80nm인 백색 금속 산화물층을 포함하고, 상기 제2 백색 안료는 두께가 100~160nm인 백색 금속 산화물층을 포함하는 것을 특징으로 하는, 복합 백색 안료.
- 제1항에 있어서,상기 백색 금속 산화물층은상기 기재 표면에 형성되며, TiO2를 포함하는 제1 고굴절층;상기 제1 고굴절층 상에 형성되며, TiO2보다 굴절률이 낮은 물질을 포함하는 저굴절층; 및상기 저굴절층 상에 형성되며, TiO2를 포함하는 제2 고굴절층;을 포함하되,상기 제1 고굴절층의 두께 T1과 상기 제2 고굴절층의 두께를 T2라 할 때,제1 백색 안료에 있어서 2T1 > T2 ≥ T1이고, 제2 백색 안료에 있어서 3T1 ≥ T2 ≥ 2T1인 것을 특징으로 하는, 복합 백색 안료.
- 제4항 또는 제8항에 있어서,상기 제1 고굴절층 및 상기 제2 고굴절층은 TiO2를 포함하는 것을 특징으로 하는, 복합 백색 안료.
- 제4항 또는 제8항에 있어서,상기 저굴절층은 SiO2 및 MgO·SiO2 중에서 1종 이상을 포함하는 것을 특징으로 하는, 복합 백색 안료.
- 제1항 내지 제8항 중 어느 한 항에 있어서,상기 기질은 천연 마이카, 합성 마이카, 글래스 플레이크 및 알루미나 플레이크 중에서 선택되는 것을 특징으로 하는, 복합 백색 안료.
- 제1항 내지 제8항 중 어느 한 항에 따른 복합 백색 안료는 도료, 인쇄용 잉크, 장판, 벽지, 특수지, 플라스틱, 피혁제, 악세서리, 화장품, 세라믹 및 인조대리석 중 적어도 어느 하나에 사용되는 것을 특징으로 하는 간섭안료.
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JP2019549011A JP6883666B2 (ja) | 2017-04-21 | 2018-03-27 | 複合白色顔料 |
CN201880016802.8A CN110382629B (zh) | 2017-04-21 | 2018-03-27 | 复合白色颜料 |
US16/493,002 US11118060B2 (en) | 2017-04-21 | 2018-03-27 | Composite white pigment |
EP18788241.0A EP3613812A4 (en) | 2017-04-21 | 2018-03-27 | COMPOSITE WHITE PIGMENT |
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KR1020170051789A KR101876199B1 (ko) | 2017-04-21 | 2017-04-21 | 복합 백색 안료 및 그 제조 방법 |
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EP (1) | EP3613812A4 (ko) |
JP (1) | JP6883666B2 (ko) |
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CN110283479A (zh) * | 2019-08-02 | 2019-09-27 | 四川赛和新材料科技有限责任公司 | 一种超白复合绢云母及其制备方法 |
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KR101876199B1 (ko) | 2018-08-03 |
JP2020510118A (ja) | 2020-04-02 |
US11118060B2 (en) | 2021-09-14 |
EP3613812A4 (en) | 2020-11-04 |
EP3613812A1 (en) | 2020-02-26 |
CN110382629B (zh) | 2021-05-25 |
CN110382629A (zh) | 2019-10-25 |
US20200071534A1 (en) | 2020-03-05 |
JP6883666B2 (ja) | 2021-06-09 |
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