Oligomeric aminoketones and their use as photoinitiators

Patent metadata

Field	Value
Publication number	US-10563073-B2
Application number	US-201815965093-A
Country	US
Kind code	B2
Filing date	Apr 27, 2018
Priority date	Aug 12, 2013
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

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.

First claim

We claim:

1. An aminoketone of the general Formula II:

wherein
Each R 3 is independently selected from branched or unbranched C 1-12 alkyl, or C 3-12 cycloalkyl radical;
R 5 is selected from the group consisting of a di-, tri-, tetra-, penta- and hexavalent alkyl radical, which is optionally substituted by oxygen;
R 6 is selected from the group consisting of H, a branched or unbranched C 1-12 alkyl, and a C 3-12 aryl radical;
and
r denotes an integer from 2-6.

2. A UV-curable coating or ink comprising an aminoketone according to claim 1 , wherein the coating or ink is capable of being cured by a light emitting diode (LED).

3. A UV-curable composition comprising one or more aminoketones of claim 1 , and one or more acrylates.

4. The composition of claim 3 , which is a UV-curable coating or ink.

5. The UV-curable coating or ink of claim 4 , that is curable with UV light having a wavelength of 310-400 nm.

6. The UV-curable coating or ink of claim 4 , further comprising a colorant.

7. The UV-curable coating or ink according to claim 4 , comprising no splitting type photoinitiators.

8. A low migration printed material comprising the coating or ink of claim 4 .

9. A cured material, obtained by curing the UV-curable coating or ink of claim 4 , with UV radiation.

Assignees

• Sun Chemical Corp

Inventors

• Gaudl Kai-Uwe
• Dieker Jürgen

Classifications

• C08F222/205

  the ester chains containing seven or more carbon atoms · CPC title

• C09D11/101 Primary

  Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing · CPC title

• C07C229/52 Primary

  having amino and carboxyl groups bound to carbon atoms of six-membered aromatic rings of the same carbon skeleton · CPC title

• C08F222/225

  the ester chains containing seven or more carbon atoms · CPC title

• C09D4/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16} · CPC title