US4148767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink for dry planographic printing
Assignee: NRG Manufacturing Ltd
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Filing: 1977-09-29
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Granted: 1979-04-10
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Expires: 1997-09-29
Abstract
Abstract The invention provides a novel ink for dry planographic printing. The new ink is based on a vehicle containing the reaction product of an oil-modified alkyd resin, a rosin-modified phenolic resin, and a diisocyanate and also a high viscosity silicone oil. The new ink can be used with planographic plates having an oleophobic surface and does not adhere to the non-image areas.
Inventors
- 👤 Leonard A. Spicer
- 👤 Derek J. McGee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:49
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/102; B; B41; B41M; B41M1/00; B41M1/06; B41M1/08; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/4009; C08G18/4027; C08G18/42; C08G18/4288; C08G18/54; C08G18/542; Y; Y10; Y10S; Y10S260/00; Y10S260/38
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
95 words
An ink for dry planographic printing comprising a dispersion of pigment in a substantially non-aqueous vehicle comprising the reaction product of 40-65% of a drying oil or fatty acids derived therefrom, 4-24% of alkyd resin, 10-45% of rosin-modified phenolic resin, and 4-15% of diisocyanate, the percentages being by weight of the vehicle, the said ink having, finely and uniformly dispersed therein, 0.2 to 1% by weight of the ink of a silicone oil having a viscosity of at least 1000 centistokes at 20° C. which is immiscible or only partly miscible with the said vehicle.
Claim 2
Dependent Claim
95 words
An ink for dry planographic printing comprising a dispersion of pigment in a substantially non-aqueous vehicle comprising the reaction product of 40-65% of a drying oil or fatty acids derived therefrom, 4-24% of alkyd resin, 10-45% of rosin-modified phenolic resin, and 4-15% of diisocyanate, the percentages being by weight of the vehicle, the said ink having, finely and uniformly dispersed therein, 0.2 to 1% by weight of the ink of a silicone oil having a viscosity of at least 1000 centistokes at 20° C. which is immiscible or only partly miscible with the said vehicle.
Claim 3
Dependent Claim
43 words
An ink according to claim 1 in which the said vehicle comprises the reaction product of soya bean oil or linseed oil, an alkyd resin derived from isophthalic acid or phthalic acid and pentaerythritol or glycerol, a rosinmodified phenolic resin, and toluene diisocyanate.
Claim 4
Dependent Claim
26 words
An ink according to claim 1 in which the silicone oil is a dimethylpolysiloxane oil having a viscosity of 1000 to 10,000 centistokes at 20° C.
Claim 5
Dependent Claim
37 words
An ink according to claim 1 which also contains 0.6 to 3% by weight of the ink of an animal or vegetable wax soluble in said vehicle and having a melting point of 45° to 90° C.
Claim 6
Dependent Claim
95 words
Process for the preparation of an ink as claimed in claim 1 which comprises mixing the silicone oil in an animal or vegetable wax having a melting point of 45° to 95° C. while the latter is in the molten state, the said wax being soluble in the said vehicle, allowing the wax to solidify, dispersing the solid mixture of wax and silicone oil in the vehicle while the latter is at elevated temperature, and milling the pigment into the vehicle thereby to produce the ink having the silicone oil finely and uniformly dispersed therein.
Claim 7
Dependent Claim
39 words
A method of dry planographic printing which comprises imaging a planographic printing plate having an oleophobic surface with an ink-accepting image, applying an ink as claimed in claim 1 to the imaged plate, and printing from the inked plate.
Claim 8
Dependent Claim
24 words
A method according to claim 6 in which the said plate carries an image of a fused toner applied thereto by an electrophotographic method.
Claim 9
Dependent Claim
19 words
A method according to claim 7 in which the said toner is a polystyrene-based or styrene copolymer resin-based toner.
References Cited (Backward Citations)
GB405603A
Cited
GB694716A
Cited
GB699513A
Cited
GB868122A
Cited
US3075941A
Cited
US3015637A
Cited
US3125540A
Cited
GB979273A
Cited
US3450791A
Cited
BE712754A
Cited
AU445242B2
Cited
GB1303649A
Cited
US3945957A
Cited
US3948827A
Cited
FR2249143B1
Cited
FR2249142B1
Cited
US3951063A
Cited
FR2276942B1
Cited
DE2551746A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-09 | 1982-10-09 | 1983-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-09 | 1986-10-09 | 1987-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-09 | 1990-10-09 | 1991-04-10 | $7700.00 | Window Closed / Lapsed |