Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2008-01-08
2008-01-08
Wu, David W. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S302000, C526S319000, C526S243000
Reexamination Certificate
active
07317061
ABSTRACT:
The invention detailed herein comprises a family of novel multifunctional acrylate ionomeric resins, which are water-dispersible, and have built-in photoinitiator. The inventive resins are made self-photoinitiating by their reaction 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 that can participate in the Michael addition reaction as “Michael donors.” These water-dispersible resins cure under standard ultraviolet (UV) cure conditions to give tack-free coatings without the addition of traditional photoinitiators. The present invention further relates to the use of these resins in coatings.
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Norbert Moszner et al. “Reaction behaviour of monomeric β-ketoesters, 4a)Polymer network formation by Michael reaction of multifunctional acetoacetates with multifunctional acrylates”, Macromol. Rapid Commun, 16, pp. 135-138 (1995). Hüthig & Wepf Verlag, Zug.
Fechter Robert B.
Narayan-Sarathy Sridevi
Ashland Licensing and Intellectual Property LLC
Bernshteyn M.
Connolly Bove & Lodge & Hutz LLP
Wu David W.
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