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US4170578A
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Aqueous rapid-drying printing ink
Assignee: O and R Inktchemie NV
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Filing: 1977-03-28
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Granted: 1979-10-09
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Expires: 1997-03-28
Abstract
Abstract A printing ink which rapidly dries under the influence of heat, in particular from infra-red radiation, wherein in addition to a hydrophobic phase which is composed of a non-polar solvent, a modified phenol or cresol formaldehyde resin, a crosslinkable unsaturated polyester, a peroxide catalyst for said polyester, and a pigment, the ink moreover comprises an aqueous phase constituting at least 12 wt.% of the total ink.
Inventors
- 👤 Ealbertus W. Schelhaas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:06
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/102; Y; Y10; Y10S; Y10S260/00; Y10S260/38
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
190 words
A printing ink which rapidly dries under the influence of heat, in particular from infra-red radiation, characterized in that in addition to a hydrophobic phase which is composed of a non-polar solvent, a binder formed from a phenol- or cresol formaldehyde resin modified with colophony or with colophony and a polyhydric alcohol, a crosslinkable unsaturated polyester, the weight ratio of the solvent, the resin and polyester is such that the two latter components are present in dissolved state, but the resin is no longer soluble after the polyester has been crosslinked, and as a result has disappeared from the solution, a peroxide catalyst for said polyester present in the amount of 1-6 wt.% of said binder, and an effective pigment, the ink comprising an aqueous phase constituting 12-40 wt.% of the total ink, the aqueous phase having a relative low viscosity and being emulsified in the hydrophobic phase, and a thickener being incorporated in the amount of 0.5-20 wt.% of the aqueous phase, the nature and amount of the thickener being so selected that the viscosity of the aqueous phase is substantially equal to the viscosity of the hydrophobic phase.
Claim 2
Dependent Claim
190 words
A printing ink which rapidly dries under the influence of heat, in particular from infra-red radiation, characterized in that in addition to a hydrophobic phase which is composed of a non-polar solvent, a binder formed from a phenol- or cresol formaldehyde resin modified with colophony or with colophony and a polyhydric alcohol, a crosslinkable unsaturated polyester, the weight ratio of the solvent, the resin and polyester is such that the two latter components are present in dissolved state, but the resin is no longer soluble after the polyester has been crosslinked, and as a result has disappeared from the solution, a peroxide catalyst for said polyester present in the amount of 1-6 wt.% of said binder, and an effective pigment, the ink comprising an aqueous phase constituting 12-40 wt.% of the total ink, the aqueous phase having a relative low viscosity and being emulsified in the hydrophobic phase, and a thickener being incorporated in the amount of 0.5-20 wt.% of the aqueous phase, the nature and amount of the thickener being so selected that the viscosity of the aqueous phase is substantially equal to the viscosity of the hydrophobic phase.
Claim 3
Dependent Claim
20 words
A printing ink according to claim 1, characterized in that the aqueous phase constitutes 15-25 wt.% of the total ink.
Claim 4
Dependent Claim
26 words
A printing ink according to claim 1, characterized in that the thickener is a partially oxidized or degraded starch which has been rendered soluble by gelatinization.
Claim 5
Dependent Claim
20 words
A printing ink according to claim 1, characterized in that furthermore an effective bactericide is incorporated in the aqueous phase.
Claim 6
Dependent Claim
17 words
A printing ink according to claim 1, characterized in that the non-polar solvent is a hydrocarbon mixture.
Claim 7
Dependent Claim
29 words
A printing ink according to claim 1, characterized in that the unsaturated polyester is composed of a polyhydric alcohol, a phthalic acid component and an unsaturated aliphatic carboxylic acid.
Claim 8
Dependent Claim
33 words
A printing ink according to claim 1, characterized in that the peroxide catalyst is an organic peroxide which is decomposed at a temperature between 70° and 80° C. with formation of free radicals.
Claim 9
Dependent Claim
42 words
A printing ink according to claim 1, characterized in that the weight ratio of the resin and polyester together to the non-polar solvent is greater than 1/1, while the weight ratio of the resin only to the solvent is smaller than 1/1.
Claim 10
Dependent Claim
48 words
A printing ink according to claim 1, characterized in that the ink contains as additive fine granules of a modified starch or a starch derivative having a limited swelling power under the influence of water, and of which the average granular size preferably is not more than 20μ.
Claim 11
Dependent Claim
27 words
A printing ink according to claim 9, characterized in that the added fine granules are present in an amount of 0.1-2.0 wt.%, calculated on the total ink.
Claim 12
Dependent Claim
54 words
A printing process, in particular a planographic or relief printing process, in which is employed a printing ink according to claim 1 for printing a material which is capable of absorbing the non-polar solvent of the printing ink, and the printed material is exposed to the influence of heat, in particular from infra-red radiation.
Claim 13
Dependent Claim
19 words
A printing process according to claim 11, characterized in that the infra-red radiation substantially lies in the near infra-red.
Claim 14
Dependent Claim
10 words
Printed material, obtained by the process according to claim 11.
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) | 1982-10-08 | 1983-04-09 | 1983-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-08 | 1987-04-09 | 1987-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-08 | 1991-04-09 | 1991-10-09 | $7700.00 | Window Closed / Lapsed |