Method of producing pigment with pearly luster based on mica flakes

专利摘要:
This invention relates to the preparation of a pearlescent pigment based on mica flakes. The pigment is obtained by precipitation on flakes in an aqueous suspension of alternating layers of titanium and tin hydroxides, by additional deposition of a layer of manganese hydroxide in an amount of 0.05-0.5 wt.%, Calculated on the calcination of manganese oxide. The pigment is washed, dried and calcined at 800 ° C. The durability of the pigment is thus increased from 1 to 5 points. 3 tab.
公开号:SU1433417A3
申请号:SU823525392
申请日:1982-12-23
公开日:1988-10-23
发明作者:Бернхард Хорст
申请人:Мерк Патент Гмбх (Фирма)；
IPC主号:

专利说明:

. The invention relates to a method; obtaining a pearlescent I gloss pigment with improved light resistance based on mica plates.
The purpose of the invention is to improve the light fastness of the pigment.
The pearly glitter pigment based on mica flakes contains a coating of successive layers of titanium dioxide in rutile form and an oxide layer located between them; tin, as well as from the additional in I as the outer layer of manganese oxide I in the amount of 0.05-0.5 May.7
Example 1 45 g of potassium mica (with a size of 10–70 µm) in an aqueous suspension are deposited alternating layers of titanium hydroxide and tin hydroxide in an amount to ensure their content in the finished pigment 7–70 and 3–25 wt%, respectively. . After reaching a yellow interference color, they are decanty and re-suspended in 1000 ml of water at. Then, using ammonia, the pH is set at 6.1, and a solution of 0.28 g of MnSO in 80 ml of water is slowly added, the pH value being maintained at 6.1 by constant addition of ammonia. After that, the pigment is separated, washed, dried and calcined at 30 minutes. Received-; This pigment thus contains 0.15 mA c.% manganese oxide. Data; ON photoactivity is presented in: Table. one.
The light resistance C I determined by photoactivity is compared to this end; pigments are incorporated into a mass of synthetic material from which: plates are formed, which are then subjected to strong irradiation with an ultraviolet lamp. The degree of plate luminosity is analyzed
Q s
0 5 o
j.
five
0
after 3, 12 and 24 hours. The assessment was made in accordance with ISO 105, section L 02 according to DIN 54 001 (with this rating, the score of 5 is the highest, and the score of 1 means the worst result).
Examples 2-4 are carried out as in Example 1, but layers of potassium mica are applied to achieve a red interference color and MnSO in an amount of 0.12 g, 0.24 g and 0.48 g. Correspondingly, pigments are obtained containing MpO; : 0.05; 0.1 and 0.2% by weight, respectively.
Data on photoactivity are presented in table. 2
Examples 5-8 are carried out as in Example 1, but layers are applied until a green interference color is achieved. Pigments with an additional layer of manganese oxide are obtained: 0.05; 0.1 and 0.2 wt.%, And with the introduction of 1.2 g of MnSO in VO ml of water, 0.5 wt.% Manganese oxide.
Data on photoactivity are put in table 3.

权利要求:
Claims (1)
[1]
Formula from about r. e shadow
A method of producing pearlescent pigment based on mica flakes, including precipitating on flakes in an aqueous suspension alternating layers of titanium and tin hydroxides, washing the resulting product, drying and calcining, characterized in that, in order to improve the light fastness of the pigment, before washing the product an additional layer of manganese hydroxide is deposited in an amount of 0.05-0.5 wt.% in terms of the manganese oxide obtained after calcination.
 Table 1
Without MpO (known)
In example 1, with MpO (0.15 wt.%)
2-3
1Be MpO (known)
2C 0.05 wt.% MpO
3C 0.2 wt.% MpO
4C, O, 2 wt.% MpO
Without MpO2-31
C 0.05 wt.% MpO 42-3
With 0.1 wt.% MpO 54
With 0.2 wt.% MpO 54
With 0.5 wt.% MpO 54
14334174
table 2
1 3 4 4
one
1-2 2-3 2-3
Tbl l and c and 3
one
one
2-3
3
3

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同族专利:

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公开号 | 公开日

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JPS58149958A|1983-09-06|

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AU561892B2|1987-05-21|

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DE3151343A1|1983-07-07|

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KR840002878A|1984-07-21|

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KR890003130B1|1989-08-23|

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ES518526A0|1984-02-16|

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IN157768B|1986-06-14|

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CS236865B2|1985-05-15|

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EP0082986B1|1985-09-04|

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DE3266068D1|1985-10-10|

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AU9014982A|1983-06-30|

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US4565581A|1986-01-21|

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PL239717A2|1983-07-18|

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PL136023B2|1986-01-31|

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CA1183657A|1985-03-12|

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法律状态:

优先权:

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申请号 | 申请日 | 专利标题

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