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US5053079A
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Dispersed pigmented hot melt ink
Assignee: COATES ELECTROGRAPHICS Ltd A CORP OF GREAT BRITAIN
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Filing: 1990-05-23
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Granted: 1991-10-01
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Expires: 2010-05-23
Abstract
Abstract In the embodiments described in the specification, a dispersed, pigmented hot melt ink contains a thermoplastic vehicle, a colored pigment, and a dispersing agent to inhibit settling or agglomeration of pigment when the ink is molten comprising an isocyanate-modified microcrystalline wax or lignite wax in an amount of 2 to 100 weight percent of the weight of the vehicle. Preferred is the isocyanate-modified microcrystalline wax marketed as Petrolite WB17.
Inventors
- 👤 John P. N. Haxell
- 👤 Edward A. Brown
- 👤 Derek E. Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:59
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30; C09D11/34
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
42 words
A hot melt ink comprising a thermoplastic vehicle having a melting point above about 40° C., a pigment, and a dispersing agent in an amount effective to disperse said pigment selected from the group consisting of isocyanate-modified microcrystalline waxes and lignite waxes.
Claim 2
Dependent Claim
42 words
A hot melt ink comprising a thermoplastic vehicle having a melting point above about 40° C., a pigment, and a dispersing agent in an amount effective to disperse said pigment selected from the group consisting of isocyanate-modified microcrystalline waxes and lignite waxes.
Claim 3
Dependent Claim
17 words
A hot melt ink according to claim 1 wherein the dispersing agent is an isocyanate-modified microcrystalline wax.
Claim 4
Dependent Claim
16 words
A hot melt ink according to claim 1 wherein the dispersing agent is a lignite wax.
Claim 5
Dependent Claim
35 words
A hot melt ink according to claim 1 wherein the dispersing agent is present in an amount of from about 2 to about 100 weight percent of the amount of thermoplastic vehicle in the ink.
Claim 6
Dependent Claim
35 words
A hot melt ink according to claim 1 wherein the dispersing agent is present in an amount of from about 2.5 to about 20 weight percent of the amount of thermoplastic vehicle in the ink.
Claim 7
Dependent Claim
32 words
A hot melt ink according to claim 1 wherein the pigment is present in an amount of from about 1 to about 4 weight percent of the total weight of the ink.
Claim 8
Dependent Claim
57 words
A hot melt ink comprising a thermoplastic vehicle having a melting point above about 40° C., a pigment in an amount of from about 1 to about 4 weight percent, and a dispersing agent comprising an isocyanate-modified microcrystalline wax in an amount of from about 2 to about 100 weight percent of the weight of the vehicle.
Claim 9
Dependent Claim
57 words
A hot melt ink comprising a thermoplastic vehicle having a melting point above about 40° C., a pigment in an amount of from about 1 to about 4 weight percent, and a dispersing agent comprising an isocyanate-modified microcrystalline wax in an amount of from about 2 to about 100 weight percent of the weight of the vehicle.
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) | 1994-09-30 | 1995-04-01 | 1995-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-30 | 1999-04-01 | 1999-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-30 | 2003-04-01 | 2003-10-01 | $7700.00 | Window Closed / Lapsed |