Polymer-Bonded Quaterrylene Dyes for Ink Authentication

Solution Overview

Problem

Quaterrylene and terrylene dyes have low solubility and dispersibility in liquid media, limiting their suitability for use in printing inks and other applications, making it difficult to distinguish authentic from counterfeit products and secure documents.

Innovation Solution

Binding quaterrylene and terrylene dyes to a polymer that is soluble in the liquid medium, such as a phenolic resin, to increase their solubility and dispersibility, using covalent bonding with polar groups like hydroxy, carboxy, and amino groups.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If quaterrylene and terrylene dyes are used as colorants in printing inks, then the authentication and security marking capability is improved, but the solubility and dispersibility in liquid media deteriorates

Engineering Contradiction:

Improveauthentication capabilityVSAvoidsolubility

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent combines quaterrylene and terrylene dyes with polymers to create composite materials. The polymer acts as a carrier that improves solubility and dispersibility while maintaining the authenticating properties of the dye. This is achieved by forming a composite structure where the dye molecules are associated with polymer chains, allowing the mixture to function both as an effective authentication marker and as a soluble/disperseable liquid composition component.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent introduces a polymer as an intermediary substance between the quaterrylene/terrylene dye and the liquid medium. This polymer mediator facilitates solubility and dispersibility without interfering with the authentication function of the dye. The polymer acts as a bridge that allows the dye to be effectively delivered in liquid form while maintaining its security marking capabilities.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If quaterrylene and terrylene dyes are used as colorants in printing inks, then the authentication and security marking capability is improved, but the dispersibility in liquid media deteriorates

Engineering Contradiction:

Improveauthentication capabilityVSAvoiddispersibility

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent combines quaterrylene and terrylene dyes with polymers to create composite materials. The polymer acts as a carrier that improves solubility and dispersibility while maintaining the authenticating properties of the dye. This is achieved by forming a composite structure where the dye molecules are associated with polymer chains, allowing the mixture to function both as an effective authentication marker and as a soluble/disperseable liquid composition component.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent introduces a polymer as an intermediary substance between the quaterrylene/terrylene dye and the liquid medium. This polymer mediator facilitates solubility and dispersibility without interfering with the authentication function of the dye. The polymer acts as a bridge that allows the dye to be effectively delivered in liquid form while maintaining its security marking capabilities.

Inventive Principle:

Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enhances the solubility and dispersibility of quaterrylene and terrylene dyes in liquid media, enabling their effective use in printing inks and other compositions, improving the ability to authenticate and secure products and documents.

Implementation Method 1

the quaterrylene and/or terrylene dye may be covalently bonded to the polymer

Methodology Applied

Scientific EffectCovalent bonding: Chemical Bonding

Implementation Method 2

binding the quaterrylene and/or terrylene dye to a polymer which is soluble in the liquid medium

Methodology Applied

Scientific EffectSolubility enhancement: Solvation

Implementation Method 3

The parent compounds quaterrylene and terrylene display fluorescence

Methodology Applied

Scientific EffectFluorescence: Fluorescence

Data Source

PatentEP2714825B1Polymer-bonded quaterrylene and/or terrylene dyes and compositions containing same

Publication Date: 2015.11.25 SICPA HOLDING SA

AI summary

The invention provides a method of increasing the solubility and/or dispersibility of a quaterrylene and/or terrylene dye in a liquid medium such as, e.g., a liquid medium comprised in a printing ink composition. The method comprises covalently binding the quaterrylene and/or terrylene dye to a polymer which is soluble in the liquid medium. The invention also provides a printing ink composition which comprises a polar liquid medium that has at least one polymer-covalently bonded quaterrylene and/or terrylene dye of the present invention as set forth above (including the various aspects thereof) dissolved or dispersed therein. The invention also provides a marking or security feature which is made with the printing ink composition of the present invention as set forth above (including the various aspects thereof).