Oligomeric aminoketones and their use as photoinitiators

Patent metadata

Field	Value
Publication number	US-11608445-B2
Application number	US-202117494038-A
Country	US
Kind code	B2
Filing date	Oct 5, 2021
Priority date	Oct 14, 2020
Publication date	Mar 21, 2023
Grant date	Mar 21, 2023

Abstract

The invention relates to photoactive oligomeric aminoketones for compositions and inks curable with ultraviolet (UV) light. The oligomeric ketones are particularly useful for printing or coating materials wherein a low migration of photoinitiators, and reduced transfer of ink from the printed to another surface are desired, such as, for example, food packaging.

First claim

What is claimed is:

1. An aminoketone of the general Formula I:

wherein
each R 1 is independently selected from branched or unbranched C 1-12 alkyl, or C 3-12 cycloalkyl radical; each of which is independently optionally substituted with R 5 ;
R 4 is selected from the group consisting of a di-, tri-, tetra-, penta- and hexavalent alkyl radical, wherein CH 2 groups may optionally be replaced by an oxygen or substituted by hydroxyl-functions as a result of the reaction with glycidyl or epoxy-compounds;
R 3 is selected from the group consisting of H, a branched or unbranched C 1-12 alkyl, and a C 3-12 aryl radical;
each R 5 is independently selected from the group consisting of oxygen, nitrogen, and sulfur;
each R 2 is independently selected from branched or unbranched C 1-12 alkyl, or C 3-12 cycloalkyl, preferably C 1 to C 4 alkyl, R 2 can substitute one (m=1), two (m=2), three (m=3), or all four (m=4) hydrogens on the aromatic ring bearing the amino-substituent; and
when R 4 is formed by the reaction with a glycidyl ether or epoxy-compounds then n denotes an integer from 1 to 4; in all other instances, n denotes an integer from 2 to 6.

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

3. The composition of claim 2 , which is a UV-curable coating or ink.

4. The UV-curable coating or ink of claim 3 that is curable with UV light having a wavelength of 310-400 nm.

5. The UV-curable coating or ink of claim 3 , further comprising a colorant.

6. 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).

7. The UV-curable coating or ink according to claim 2 , comprising no splitting type photoinitiators.

8. A low migration printed material comprising the coating or ink of claim 2 .

9. A cured material, obtained by curing the UV-curable coating or ink of claim 2 with UV radiation.

Assignees

• Sun Chemical Corp

Inventors

• Dieker Jürgen
• Gaudl Kai-Uwe W

Classifications

• 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

• C09D11/03

  characterised by features other than the chemical nature of the binder · 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

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

• C09D11/107

  from unsaturated acids or derivatives thereof · CPC title