Oligomeric aminoketones and their use as photoinitiators
AssigneeSun Chemical Corporation
InventorsKai-Uwe Gaudl, Jürgen Dieker
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Abstract
The invention relates to photoactive oligomeric aminoketones of general Formulae I and II, for compositions and inks curable with ultraviolet (UV) light. The oligomeric aminoketones of the general Formula I are made by condensation of aminoketones with aldehydes, and aminoketones of the general Formula II are made by acylation of aromatic amines with phthalic anhydride, followed by esterification with a polyol. The aminoketones provide good curability of energy curable coatings and inks with UV-A light, and are proposed for photoinitiator systems for low migration inks.
Claims9
An aminoketone of the general Formula II:
- wherein
- Each R3 is independently selected from branched or unbranched C1-12 alkyl, or C3-12 cycloalkyl radical;
- R5 is selected from the group consisting of a di-, tri-, tetra-, penta- and hexavalent alkyl radical, which is optionally substituted by oxygen;
- R6 is selected from the group consisting of H, a branched or unbranched C1-12 alkyl, and a C3-12 aryl radical;
- and
- r denotes an integer from 2-6.
Dependencies are inferred from the claim text.