Multifunctional acrylate oligomers as pigment grinding...

Details Multifunctional acrylate oligomers as pigment grinding... Multifunctional acrylate oligomers as pigment grinding...

2007-08-07

2007-08-07

Feely, Michael J. (Department: 1712)

Compositions: coating or plastic

Coating or plastic compositions

Marking

C106S031600, C106S031860, C106S031900, C525S242000, C525S540000

Reexamination Certificate

active

10682875

ABSTRACT:
The invention detailed herein comprises a family of multifunctional acrylate oligomers which are useful as pigment grinding vehicles for use in radiation-curable coating formulations. The multifunctional acrylate resins are formed by the reaction of acrylate monomers and oligomers with β-keto esters (e.g., acetoacetates), β-diketones (e.g., 2,4-pentanedione), β-keto amides (e.g., acetoacetanilide, acetoacetamide), and/or other β-dicarbonyl compounds or Michael “donors” that can participate in the Michael addition reaction. These resin vehicles have a built-in chromophore that enables ink formulations made from their dispersions to cure under standard UV-cure conditions with significantly less photoinitiator than commercial formulations. The resins also exhibit excellent pigment wetting characteristics and can be designed to function as a single dispersion vehicle for different pigments and different ink applications such as screen, flexographic, and lithographic printing.

REFERENCES:
patent: 6300388 (2001-10-01), Verdonck et al.
patent: 6673851 (2004-01-01), Moy et al.
patent: 2003/0119943 (2003-06-01), Tucker et al.
patent: 2005/0027082 (2005-02-01), Narayan-Sarathy et al.
patent: 2005/0080162 (2005-04-01), Narayan-Sarathy et al.
Ross Planetary Mixer Information: provided by Ross website (www.planetarymixers.com).
U.S. Appl. No. 10/682,874.

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