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US 6,294,592 B1Granted
Pigment preparations with radiation curable binder suitable for ink jet printing method
AssigneeBASF SE
InventorsManfred Herrmann, Gert Motzkus, Wolfgang Reich, Rüdiger Sens, Bernd Siegel, Karl Siemensmeyer
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Abstract
The invention provides for pigment preparations containing, as main components, A) at least a finely divided organic or inorganic pigment, B) a dispersing agent composed of formaldehyde-arylsulfonic acid or oxalkylated phenols condensates, C) a radiation curable binder, D) optionally a photoinitiator, and E) water. The invention also provides for the use of said preparations as inks for said ink jet printing method.
Claims9
Ink-jet ink comprising:
- A) from 0.1 to 20% by weight of at least one finely divided, organic or inorganic pigment,
- B) from 0.1 to 20% by weight of a dispersant comprising (B1) an arylsulfonic acid/formaldehyde condensation product comprising,
- from 50 to 97% by weight of an arylsulfonic acid/formaldehyde condensation product and
- from 3 to 50% by weight of an aromatic or long-chain aliphatic carboxylic acid, its salt or its anhydride or a mixture thereof,
- or (B2) an alkoxylated phenol of the formula I or II
- where
- a is from 0 to on average 125,
- b is on average from 37 to 250, the ratio b:a being at least 1:1 when b>37, and
- d is 0 or 1, or mixtures thereof,
- C) from 0.1 to 20% by weight of a radiation-curable binder,
- D) from 0 to 10% by weight of a photoinitiator, and
- E) at least 35% by weight of water
- as essential constituents.
10 more elements
Dependencies are inferred from the claim text.