Patent US4248759A successfully refreshed from Google Patents.
US4668570A
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Lacquering process using nacreous pigments
Assignee: Merck Patent GmbH
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Filing: 1986-06-19
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Granted: 1987-05-26
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Expires: 2006-06-19
Abstract
Abstract Base lacquers suitable for use in multi-layer lacquerings containing a layer of base lacquer and a layer of clear lacquer on top of this, contain a nacreous pigment based on mica flakes coated with metal oxides, wherein the nacreous pigments have a particle size substantially in the range between 5 and 25 μm. The resultant lacquerings have advantageous properties.
Inventors
- 👤 Reiner Esselborn
- 👤 Klaus Ambrosius
- 👤 Hans-Joachim Graetz
- 👤 Manfred Letsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:51
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/36; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/251; Y10T428/254; Y10T428/256
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
81 words
In a base lacquer useful in preparing a multi-layer lacquering comprising a layer of the base lacquer and, thereover, a layer of clear lacquer, the improvement wherein the base lacquer comprises particles of a nacreous pigment based on mica flakes coated with a metal oxide, the pigment having a particle size distribution such that at least 60% of the particles are of a diameter less than 25 μm and less than 0.5% of said particles have a diameter above 40 μm.
Claim 2
Dependent Claim
81 words
In a base lacquer useful in preparing a multi-layer lacquering comprising a layer of the base lacquer and, thereover, a layer of clear lacquer, the improvement wherein the base lacquer comprises particles of a nacreous pigment based on mica flakes coated with a metal oxide, the pigment having a particle size distribution such that at least 60% of the particles are of a diameter less than 25 μm and less than 0.5% of said particles have a diameter above 40 μm.
Claim 3
Dependent Claim
21 words
A base lacquer of claim 1 wherein at least 80% of said particles are of a diameter less than 25 μm.
Claim 4
Dependent Claim
23 words
A base lacquer of claim 1 wherein at least 60% of said particles are of a diameter in the range of 5-25 μm.
Claim 5
Dependent Claim
23 words
A base lacquer of claim 3 wherein at least 80% of said particles are of a diameter in the range of 5-25 μm.
Claim 6
Dependent Claim
20 words
A base lacquer of claim 1 wherein the nacreous pigment is based on muscovite mica coated with a rutile layer.
Claim 7
Dependent Claim
26 words
A base lacquer of claim 1 wherein the amount of said pigment is 5-30 wt. % based on the total solids content of the base lacquer.
Claim 8
Dependent Claim
85 words
In a method for lacquering a surface of an object with a multi-layer lacquering comprising a layer of a base lacquer and, thereover, a layer of clear laquer, the improvement wherein the base lacquer comprises particles of a nacreous pigment based on mica flakes coated with a metal oxide, the pigment having a particle size distribution such that at least 60% of the particles are of a diameter less than 25 μm and less than 0.5% of said particles have a diameter above 40 μm.
Claim 9
Dependent Claim
85 words
In a method for lacquering a surface of an object with a multi-layer lacquering comprising a layer of a base lacquer and, thereover, a layer of clear laquer, the improvement wherein the base lacquer comprises particles of a nacreous pigment based on mica flakes coated with a metal oxide, the pigment having a particle size distribution such that at least 60% of the particles are of a diameter less than 25 μm and less than 0.5% of said particles have a diameter above 40 μm.
Claim 10
Dependent Claim
20 words
A method of claim 7 wherein at least 80% of said particles are of a diameter less than 25 μm.
Claim 11
Dependent Claim
22 words
A method of claim 7 wherein at least 80% of said particles are of a diameter in the range of 5-25 μm.
Claim 12
Dependent Claim
25 words
A method of claim 7 wherein the amount of said pigment is 5-30 wt. % based on the total solids content of the base lacquer.
Claim 13
Dependent Claim
17 words
A method of claim 7 comprising spraying both of said layers onto a surface of an automobile.
Claim 14
Dependent Claim
19 words
A method of claim 11 wherein the nacreous pigment is based on muscovite mica coated with a rutile layer.
Claim 15
Dependent Claim
10 words
A lacquered surface prepared by the method of claim 7.
Claim 16
Dependent Claim
10 words
A lacquered surface prepared by the method of claim 11.
Claim 17
Dependent Claim
10 words
A lacquered surface prepared by the method of claim 1.
Claim 18
Dependent Claim
11 words
A lacquered automobile surface prepared by the method of claim 12.
Claim 19
Dependent Claim
18 words
A base lacquer of claim 1, wherein substantially none of said particles have a diameter above 40 μm.
Claim 20
Dependent Claim
17 words
A method of claim 1, wherein substantially none of said particles have a diameter above 40 μm.
Claim 21
Dependent Claim
22 words
A base lacquer of claim 1 wherein the particles are substantially all in the size range from about 5 to 25 μm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |