US2020231827A1PendingUtilityA1
Alpha-alumina flakes
Est. expiryApr 30, 2033(~6.8 yrs left)· nominal 20-yr term from priority
C09C 1/0051C09D 7/61C09C 1/407C09C 1/28C09C 2200/30C09C 1/0021C09C 1/0066C09D 7/70C09C 1/0039C09C 2200/301C01F 7/021C09C 1/0018C09C 2200/1004C01F 7/02C01P 2004/61C09C 1/0024C09D 11/037C01P 2004/20C09C 1/043C09D 5/00C01P 2004/80C01P 2004/51Y10T428/2982C01P 2002/52C09C 1/0015C01P 2004/24C08K 3/22C09D 7/62C01P 2002/84C01F 7/34C01F 7/441C01P 2004/62
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Claims
Abstract
The present invention relates to alumina flakes having a defined thickness and particle size distribution and to their use in varnishes, paints, automotive coatings, printing inks, masterbatches, plastics and cosmetic formulations and as substrate for effect pigments.
Claims
exact text as granted — not AI-modified1 - 16 . (canceled)
17 . An automobile coating, automotive finishing or industrial coating, comprising coated and/or uncoated Al 2 O 3 flakes having a particle thickness of less than 500 nm and a D 50 -value of 15-30 μm and a D 90 -value of 30-45 μm and one or more further ingredients suitable for an automobile coating, automotive finishing or industrial coating.
18 . An automobile coating, automotive finishing or industrial coating according to claim 17 , which is a single layer coating or a two-coat system in which the coated and/or uncoated Al 2 O 3 flakes are present in a base coat.
19 . An automobile coating, automotive finishing or industrial coating according to claim 17 , wherein the coated and/or uncoated Al 2 O 3 flakes are present in an amount of 0.5 to 10% by weight based on the weight of the automobile coating, automotive finishing or industrial coating.
20 . An automobile coating, automotive finishing or industrial coating according to claim 17 , wherein the Al 2 O 3 flakes have a particle thickness of 130-400 nm and a D 50 -value of 15-30 μm and a D 90 -value of 30-45 μm and a D 10 -value of <9.5 μm.
21 . An automobile coating, automotive finishing or industrial coating according to claim 17 , wherein the Al 2 O 3 flakes are α-alumina flakes.
22 . An automobile coating, automotive finishing or industrial coating according to claim 17 , wherein the Al 2 O 3 flakes have a standard deviation of thickness distribution of less than 80 nm.
23 . An automobile coating, automotive finishing or industrial coating according to claim 17 , wherein the Al 2 O 3 flakes are doped with TiO 2 , ZrO 2 , SiO 2 , SnO 2 , In 2 O 3 , or ZnO or a combination thereof.
24 . An automobile coating, automotive finishing or industrial coating according to claim 17 , wherein the Al 2 O 3 flakes are coated with at least one layer of a metal oxide, a mixture of at least two metal oxides, a metal, a metal sulphide, a titanium suboxide, a titanium oxynitride, FeO(OH), SiO 2 , a metal alloy or a rare earth compound, which form one or more coatings.
25 . An automobile coating, automotive finishing or industrial coating according to claim 17 , wherein the Al 2 O 3 flakes are coated with at least one layer of a metal oxide or a mixture of at least two metal oxides.
26 . An automobile coating, automotive finishing or industrial coating according to claim 17 , wherein the Al 2 O 3 flakes are coated with the following layer sequence:
Al 2 O 3 flake+TiO 2 Al 2 O 3 flake+TiO 2 /Fe 2 O 3 Al 2 O 3 flake+Fe 2 O 3 Al 2 O 3 flake+TiO 2 +Fe 2 O 3 Al 2 O 3 flake+TiO 2 +Fe 3 O 4 Al 2 O 3 flake+TiO 2 +SiO 2 +TiO 2 Al 2 O 3 flake+Fe 2 O 3 +SiO 2 +TiO 2 Al 2 O 3 flake+TiO 2 /Fe 2 O 3 +SiO 2 +TiO 2 Al 2 O 3 flake+TiO 2 +SiO 2 +TiO 2 /Fe 2 O 3 Al 2 O 3 flake+TiO 2 +SiO 2 Al 2 O 3 flake+TiO 2 +SiO 2 /Al 2 O 3 Al 2 O 3 flake+TiO 2 +Al 2 O 3 Al 2 O 3 flake+SnO 2 Al 2 O 3 flake+SnO 2 +TiO 2 Al 2 O 3 flake+SnO 2 +Fe 2 O 3 Al 2 O 3 flake+SiO 2 Al 2 O 3 flake+SiO 2 +TiO 2 Al 2 O 3 flake+SiO 2 +TiO 2 /Fe 2 O 3 Al 2 O 3 flake+SiO 2 +Fe 2 O 3 Al 2 O 3 flake+SiO 2 +TiO 2 +Fe 2 O 3 Al 2 O 3 flake+SiO 2 +TiO 2 +Fe 3 O 4 Al 2 O 3 flake+SiO 2 +TiO 2 +SiO 2 +TiO 2 Al 2 O 3 flake+SiO 2 +Fe 2 O 3 +SiO 2 +TiO 2 Al 2 O 3 flake+SiO 2 +TiO 2 /Fe 2 O 3 +SiO 2 +TiO 2 Al 2 O 3 flake+SiO 2 +TiO 2 +SiO 2 +TiO 2 /Fe 2 O 3 Al 2 O 3 flake+SiO 2 +TiO 2 +SiO 2 Al 2 O 3 flake+SiO 2 +TiO 2 +SiO 2 /Al 2 O 3 Al 2 O 3 flake+SiO 2 +TiO 2 +Al 2 O 3 Al 2 O 3 flake+TiO 2 +Prussian Blue or Al 2 O 3 flake+TiO 2 +Carmine Red.
27 . An automobile coating, automotive finishing or industrial coating according to claim 17 , wherein the Al 2 O 3 flakes are coated with TiO 2 in the rutile modification.
28 . An automobile coating, automotive finishing or industrial coating according to claim 17 , wherein the Al 2 O 3 flakes are coated with TiO 2 in the anatase modification.
29 . An automobile coating, automotive finishing or industrial coating according to claim 17 , wherein the Al 2 O 3 flakes are coated, and which coated flakes consist of 40-90 wt. % of Al 2 O 3 flakes and 10-60 wt. % of the one or more coatings.
30 . An automobile coating, automotive finishing or industrial coating according to claim 17 , wherein the Al 2 O 3 flakes have a D 10 -value of <9.2 am.
31 . An automobile coating, automotive finishing or industrial coating according to claim 17 , wherein the Al 2 O 3 flakes have a D 10 -value of 8.8 to 9.2 am.
32 . An automobile coating, automotive finishing or industrial coating according to claim 17 , wherein the Al 2 O 3 flakes have a particle thickness of 200-250 nm.
33 . An automobile coating, automotive finishing or industrial coating according to claim 17 , wherein the Al 2 O 3 flakes have a particle thickness of 130-400 nm and a D 50 -value of 15-30 μm and a D 90 -value of 30-45 μm and a D 10 -value of 8.8 to <9.5 am.
34 . An automobile coating, automotive finishing or industrial coating composition, comprising coated and/or uncoated Al 2 O 3 flakes having a particle thickness of less than 500 nm and a D 50 -value of 15-30 am and a D 90 -value of 30-45 am and one or more further ingredients suitable for an automobile coating, automotive finishing or industrial coating.
35 . An automobile coating, automotive finishing or industrial coating composition according to claim 34 , wherein the coated and/or uncoated Al 2 O 3 flakes are present in an amount of 0.5 to 10% by weight based on the weight of the automobile coating, automotive finishing or industrial coating.Join the waitlist — get patent alerts
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