US 2024/0270997 A1 · PRIMER COMPOSITON FOR A FLEXOGRAPHIC PRINTING LABEL

Abstract

Plastic packaging materials and processes that facilitate recycling of PET (polyethylene terephthalate) containers such as PET bottles and crystallizable clear PET-g (glycol-modified polyethylene terephthalate) labels such as heat shrinking sleeve labels. A clear primer coating for recyclable PET-g shrink-sleeve labels, curable upon exposure to UV light, which is excellent in adhesion, steam-resistance and overprint ability, and which promotes the de-inking of subsequent coloured ink layers under relatively mild caustic wash conditions. Methods of utilizing such a primer coating within flexographic printing processes.

Claims24

Dependent claims

A primer composition (C) for a flexographic printing label wherein said primer composition comprises at least the following components of which the wt % percentages are expressed as based on the total weight of the primer composition:

one or more of a monofunctional or difunctional radiation curable monomer (c1) present in the range of 25-60 wt %;
and
a photo initiator (p1) present in a range of 0-20 wt %;
wherein the primer composition has an acid value of 50-135 mg KOH/g, and wherein the primer composition further comprises:
a cellulosic polymer (c2) present in a range of 2-12 wt %;
an acid-functional radiation curable monomer (c3) present in a range of 25-60 wt % and having an acid value of more than 240 mg KOH/g,
a multifunctional radiation curable monomer (c4) with an acrylate functionality of at least 3.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

18/291,305Filed 26 Jul 2022

Priority

NL 202897213 Aug 2021

Published

15 Aug 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification26 codes

C09D 4/06
Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable…:…
C09D 11/54
Inks: inks based on two liquids, one liquid being the ink, the other liquid being a reaction solution, a fixer or a treatment solution for the ink
B41M 1/04
Letterpress printing, e.g. book printing: flexographic printing
B41M 1/36
Printing on other surfaces than ordinary paper: on pretreated paper, e.g. parchment, oiled paper, paper for registration purposes

Primer compositon for a flexographic printing label

Life of this patent

Primer compositon for a flexographic printing label

Life of this patent

Abstract

Claims24