US4243698A
Expired / Lapsed
US
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Method for producing a pigment coating
Assignee: Licentia Patent Verwaltungs GmbH
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Filing: 1979-08-13
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Granted: 1981-01-06
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Expires: 1999-08-13
Abstract
Abstract A method is disclosed for producing a pigment coating on a substrate. A hardenable polymer coating is initially provided on the substrate, followed by an excess of hardening agent. This produces a first hardened coating with sufficient hardening agent remaining to harden a second polymer coating, containing suspended pigment, which is deposited on top of the first coating. The polymer is then pyrolyzed, leaving a coating of pigment on the substrate.
Inventors
- 👤 Otto Marzel
- 👤 Wilhelm Schwedes
- 👤 Alfred Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:18
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/22; B; B05; B05D; B05D3/00; B05D3/10; B05D3/105; B05D3/107; B05D3/108; B05D7/00; B05D7/50; B05D7/52; B05D7/54; B05D7/546
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
146 words
A method for producing a coating of pigment on a substrate, comprising: (a) providing said substrate with a first coating of a chemically hardenable polymer, and then drying said first coating; (b) contacting said dried first coating with a hardening agent compatible with said polymer in an amount sufficient to completely harden said polymer and to leave excess hardening agent on the surface of said polymer; (c) subsequently providing said first coating with a second coating comprising a polymer which is compatible with said agent and a pigment suspended therein, such that a portion of said second coating is hardened by said excess agent; (d) removing the non-hardened portion of said second coating; and (e) heating the coated substrate for a time and at a temperature sufficient to pyrolyze said hardened polymer, but insufficient to decompose said pigment, to leave a substrate covered only with pigment.
Claim 2
Independent Claim
146 words
A method for producing a coating of pigment on a substrate, comprising: (a) providing said substrate with a first coating of a chemically hardenable polymer, and then drying said first coating; (b) contacting said dried first coating with a hardening agent compatible with said polymer in an amount sufficient to completely harden said polymer and to leave excess hardening agent on the surface of said polymer; (c) subsequently providing said first coating with a second coating comprising a polymer which is compatible with said agent and a pigment suspended therein, such that a portion of said second coating is hardened by said excess agent; (d) removing the non-hardened portion of said second coating; and (e) heating the coated substrate for a time and at a temperature sufficient to pyrolyze said hardened polymer, but insufficient to decompose said pigment, to leave a substrate covered only with pigment.
Claim 3
Dependent Claim
56 words
The method according to claim 1 wherein said steps of contacting, providing said second coating, and removing said non-hardened portion of said second coating are performed in sequence at least two times, with at least two of the times being with different pigments, in order that portions of said substrate may be coated with different pigments.
Claim 4
Dependent Claim
16 words
The method according to claim 1 wherein said temperature is about 350° to about 600° C.
Claim 5
Dependent Claim
13 words
The method according to claim 1 wherein said pigment is a luminous pigment.
Claim 6
Dependent Claim
13 words
The method according to claim 1 wherein said polymers are water soluble polymers.
Claim 7
Dependent Claim
23 words
The method according to claim 5 wherein said polymers are selected from the group consisting of polyvinyl alcohol, polyvinyl pyrrolidone and cellulose derivatives.
Claim 8
Dependent Claim
17 words
The method according to claim 6 wherein said agent is tannic acid or a tannic acid derivative.
Claim 9
Dependent Claim
17 words
The method according to claim 1 wherein said agent is tannic acid or a tannic acid ester.
Claim 10
Dependent Claim
17 words
Method as defined in claim 1 wherein the pigment coating is produced on a planer substrate surface.
Claim 11
Dependent Claim
23 words
Method as defined in claim 1 wherein the pigment coating is produced on a spherical substrate surface having a small radius of curvature.
Claim 12
Dependent Claim
22 words
Method as defined in claim 1 wherein the pigment coating is produced on a substrate surface having edge faces that form angles.
Claim 13
Independent Claim
134 words
A method for producing a coating of pigment on a substrate, comprising: (a) providing said substrate with a first coating of a chemically hardenable polymer, and then drying said first coating; (b) contacting said dried first coating with a hardening agent compatible with said polymer in an amount sufficient to completely harden said polymer and to leave excess hardening agent on the surface of said polymer; (c) subsequently providing said first coating with a second coating comprising a polymer which is compatible with said agent and an organic or organometallic pigment suspended therein, such that a portion of said second coating is hardened by said excess agent; (d) removing the non-hardened portion of said second coating; and (e) drying the coated substrate at a temperature of about 100° to 150° to remove solvent components.
Claim 14
Independent Claim
134 words
A method for producing a coating of pigment on a substrate, comprising: (a) providing said substrate with a first coating of a chemically hardenable polymer, and then drying said first coating; (b) contacting said dried first coating with a hardening agent compatible with said polymer in an amount sufficient to completely harden said polymer and to leave excess hardening agent on the surface of said polymer; (c) subsequently providing said first coating with a second coating comprising a polymer which is compatible with said agent and an organic or organometallic pigment suspended therein, such that a portion of said second coating is hardened by said excess agent; (d) removing the non-hardened portion of said second coating; and (e) drying the coated substrate at a temperature of about 100° to 150° to remove solvent components.
Claim 15
Dependent Claim
56 words
The method according to claim 1 wherein said steps of contacting, providing said second coating, and removing said non-hardened portion of said second coating are performed in sequence at least two times, with at least two of the times being with different pigments, in order that portions of said substrate may be coated with different pigments.
Claim 16
Dependent Claim
13 words
The method according to claim 12 wherein said pigment is a luminous pigment.
Claim 17
Dependent Claim
13 words
The method according to claim 12 wherein said polymers are water soluble polymers.
Claim 18
Dependent Claim
23 words
The method according to claim 15 wherein said polymers are selected from the group consisting of polyvinyl alcohol, polyvinyl pyrrolidone and cellulose derivatives.
Claim 19
Dependent Claim
17 words
The method according to claim 16 wherein said agent is tannic acid or a tannic acid derivative.
Claim 20
Dependent Claim
17 words
The method according to claim 12 wherein said agent is tannic acid or a tannic acid ester.
Claim 21
Dependent Claim
17 words
Method as defined in claim 12 wherein the pigment coating is produced on a planar substrate surface.
Claim 22
Dependent Claim
23 words
Method as defined in claim 12 wherein the pigment coating is produced on a spherical substrate surface having a small radius of curvature.
Claim 23
Dependent Claim
22 words
Method as defined in claim 12 wherein the pigment coating is produced on a substrate surface having edge faces that form angles.
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) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |