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US4780140A
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Platelet-shaped iron oxide pigments
Assignee: Merck Patent GmbH
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Filing: 1987-10-22
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Granted: 1988-10-25
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Expires: 2007-10-22
Abstract
Abstract The invention relates to platelet-shaped pigments of the formula Al x Fe 2-x O 3-y , wherein x has a value from 0.02 to 0.5 and y has a value from 0.3 to 1.0, which are optionally coated with further oxides.
Inventors
- 👤 Klaus D. Franz
- 👤 Reiner Esselborn
- 👤 Ralf Emmert
- 👤 Hans D. Bruckner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:46
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/22; C09C1/24; C09C1/245; C09C1/40; C09D; C09D5/00; C09D5/36; C01; C01P; C01P2004/00; C01P2004/20; C01P2004/80; C01P2004/82; C01P2004/84
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
34 words
A platelet-shaped pigment containing iron oxide and aluminum oxide in solid solution, of the formula Al x Fe 2-x O 3-y , wherein x is 0.02 to 0.5 and y is 0.3 to 1.0.
Claim 2
Dependent Claim
34 words
A platelet-shaped pigment containing iron oxide and aluminum oxide in solid solution, of the formula Al x Fe 2-x O 3-y , wherein x is 0.02 to 0.5 and y is 0.3 to 1.0.
Claim 3
Dependent Claim
23 words
A pigment according to claim 1, additionally containing at least one oxide of group II, IV, V or VI of the periodic table.
Claim 4
Dependent Claim
38 words
A platelet-shaped pigment prepared by heating a pigment of the formula Al x Fe 2-x O 3 , wherein x has a value from 0.02 to 0.5, at a temperature of about 200°-800° C. in a reducing atmosphere.
Claim 5
Dependent Claim
38 words
A platelet-shaped pigment prepared by heating a pigment of the formula Al x Fe 2-x O 3 , wherein x has a value from 0.02 to 0.5, at a temperature of about 200°-800° C. in a reducing atmosphere.
Claim 6
Dependent Claim
15 words
A pigment according to claim 3, wherein the heating is conducted for about 10-100 minutes.
Claim 7
Dependent Claim
23 words
A pigment according to claim 3, wherein the heating is conducted for about 20-40 minutes and at a temperature of about 300°-500° C.
Claim 8
Dependent Claim
35 words
A pigment according to claim 3, wherein before or after heating, the pigment is coated with at least one group II, IV, V or VI metal oxide in an amount of about 1-60% by weight.
Claim 9
Dependent Claim
16 words
In a pigmented coating composition, the improvement wherein the pigment is a pigment of claim 1.
Claim 10
Dependent Claim
8 words
A pigmented lacquer composition, according to claim 7.
Claim 11
Dependent Claim
8 words
A pigmented paint composition, according to claim 7.
Claim 12
Dependent Claim
16 words
In a pigmented plastic composition, the improvement wherein the pigment is a pigment of claim 1.
Claim 13
Dependent Claim
13 words
A pigmented fiber composition, wherein the pigment is a pigment of claim 1.
Claim 14
Dependent Claim
13 words
A pigmented glass composition, wherein the pigment is a pigment of claim 1.
Claim 15
Dependent Claim
13 words
A pigmented ceramic composition, wherein the pigment is a pigment of claim 1.
Claim 16
Dependent Claim
13 words
A pigmented cosmetic composition, wherein the pigment is a pigment of claim 1.
Claim 17
Dependent Claim
14 words
A pigmented printing ink composition, wherein the pigment is a pigment of claim 1.
Claim 18
Dependent Claim
28 words
A pigment according to claim 2, wherein the oxide of group II, IV, V or VI is an oxide of zinc, zirconium, titanium, chromium, silicon, tin or bismuth.
References Cited (Backward Citations)
US3030307A
Cited
US4373963A
Cited
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