EP0286219A2
Expired / Lapsed
EP
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Opaque ink composition containing hollow microspheres for use in ink jet printing
Assignee: Videojet Technologies Inc
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Filing: 1988-02-26
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Granted: —
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Expires: 2008-02-26
Abstract
Abstract A non-pigmented ink suitable for use in jet printing is disclosed. The ink comprises a resin component, hollow microspheres, and a suitable carrier vehicle. The hollow microspheres contain a central void region filled with a liquid capable of diffusing through the walls of said microspheres and have an inside diameter from about 0.1 to about 0.5 micron and an outside diameter from about 0.4 to about 1 micron.
Inventors
- 👤 Adrian Loria
- 👤 Josephine Aguilar
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 15:10
CPC Classifications
C; C09; C09D; C09D11/00; C09D11/30
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
144 words
A non-pigmented ink suitable for use in ink jet printing comprising: (a) from about 2 to about 20 percent by weight of a resin component; (b) from about 5 to about 25 percent by weight of hollow microspheres; and (c) the remainder being a suitable carrier vehicle, all percentages being based upon the total weight of the ink; the hollow microspheres having permeable walls comprised of a synthetic polymeric material, a central void region filled with a liquid capable of diffusing through the walls of said microspheres, an inside diameter from about 0.1 to about 0.5 micron and an outside diameter from about 0.4 to about 1 micron; the resin component, the hollow microspheres and the carrier vehicle being chemically non-reactive with each other; and the specific gravity of the ink being about equal to or greater than the specific gravity of the microspheres.
Claim 2
Dependent Claim
144 words
A non-pigmented ink suitable for use in ink jet printing comprising: (a) from about 2 to about 20 percent by weight of a resin component; (b) from about 5 to about 25 percent by weight of hollow microspheres; and (c) the remainder being a suitable carrier vehicle, all percentages being based upon the total weight of the ink; the hollow microspheres having permeable walls comprised of a synthetic polymeric material, a central void region filled with a liquid capable of diffusing through the walls of said microspheres, an inside diameter from about 0.1 to about 0.5 micron and an outside diameter from about 0.4 to about 1 micron; the resin component, the hollow microspheres and the carrier vehicle being chemically non-reactive with each other; and the specific gravity of the ink being about equal to or greater than the specific gravity of the microspheres.
Claim 3
Dependent Claim
18 words
An ink according to claim 1, wherein the carrier vehicle comprises water, ammonium hydroxide, and a volatile solvent.
Claim 4
Dependent Claim
35 words
An ink according to claim 2, wherein the volatile slvent is a lower alkanol and is present in an amount from about 1 to about 20 percent, based on the total weight of the ink.
Claim 5
Dependent Claim
37 words
An ink according to any one of claims 1 to 3, wherein the hollow microspheres have an inside diameter from about 0.2 to about 0.4 micron and an outside diameter from about 0.5 to about 0.7 micron.
Claim 6
Dependent Claim
18 words
An ink according to any preceding claim, wherein the hollow microspheres have walls comprised of an acrylic/styrene copolymer.
Claim 7
Dependent Claim
14 words
An ink according to any preceding claim, wherein the resin is an acrylic/styrene copolymer.
Claim 8
Dependent Claim
43 words
An ink according to any preceding claim, wherein the ink has a viscosity at 25°C from about 3 to about 6 centipoise, an electrical resistivity from about 100 to about 1000 ohm-cm, and a sonic velocity from about 1500 to about 1700 metres/sec.
Claim 9
Dependent Claim
17 words
An ink according to any preceding claim, wherein the pH is from about 7 to about 9.
Claim 10
Dependent Claim
12 words
An ink according to any preceding claim, also comprising a coalescent agent.
Claim 11
Dependent Claim
21 words
An ink according to claim 9, wherein the coalescent agent is selected from the group consisting of carbitol and glycol ethers.
Claim 12
Dependent Claim
15 words
An ink according to any preceding claim, also comprising a plasticizer and a defoaming agent.
Claim 13
Dependent Claim
35 words
An ink according to any preceding claim, wherein the hollow microspheres have permeable walls comprised of a polymer selected from the group consisting of 2-ethylhexyacrylate, methyl methacrylate and copolymers of styrene and a vinyl monomer.
Claim 14
Dependent Claim
31 words
An ink according to any preceding claim, wherein the microspheres have an inside diameter of about 0.3 micron and an outside diameter of about 0.5 micron and are filled with water.
References Cited (Backward Citations)
No citation records indexed.
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