C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
400/1800, 402/30
C08F 220/18 (2006.01) C08L 33/08 (2006.01) C09D 7/00 (2006.01) C09D 11/02 (2006.01) C09D 11/10 (2006.01)
Patent
CA 1120641
Abstract of the Disclosure A thickened organic solvent based system, particularly an aliphatic hydrocarbon-based liquid composition, such as an ink, the polymeric thickener therefore, a method of making the thickener by emulsion polymerization, and methods of using the thickener are disclosed. The preferred novel thickener is an addition polymer of hydrophobic monomers and hydrophilic monomers, specific preferred copolymers being of isobutyl methacrylate as the hydrophobic monomer, and one or more acids selected from acrylic acid, methacrylic acid, and itaconic acid as the hydrophilic monomer, in weight ratios of between about 99.920.1 and 90:10. The preferred acid is methacrylic acid. Exemplified are ratios of for instance 99:1 and 98:2. The novel aliphatic hydrocarbon-based liquid composition contains an organic solvent, in most cases a pigment, a polymeri- resin binder such as limed rosin, and an acrylic thickener, preferably the novel thickener noted above. The organic solvent is preferably at least predominantly an aliphatic hydrocarbon. Mixtures thereof with an aromatic hydrocarbon are also useful. The molecular weight range of the polymer (Mw 100,000 - 2,000,000), the solubility thereof in certain solvents, the T (? 30°C). and the like are critical for use of the materials in nonpolar or weak solvent-based inks.
310125
Calder George V.
Mercurio Andrew
Gowling Lafleur Henderson Llp
Rohm And Haas Company
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