Dye Polymer for Enhanced Textile Deposition

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Solution Overview

Problem

There is a need to improve the deposition of reactive dyes covalently bound to polyethyleneimines on fabrics under domestic laundry conditions.

Innovation Solution

A dye polymer comprising a polyethylene imine covalently bound to a reactive dye, where the polyethylene imine has a specific range of amine nitrogen atoms substituted with ethyl alcohol groups, is used in a laundry composition with surfactants to enhance dye deposition on textiles.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If reactive dyes are covalently bound to polyethyleneimines for laundry use, then the dye polymer can be used in laundry compositions, but the deposition of the dye on fabrics is insufficient under domestic laundry conditions

Engineering Contradiction:

Improvedye depositionVSAvoiddye uptake efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent modifies the chemical parameters of the polyethyleneimine by controlling the degree of substitution with ethyl alcohol groups (20-98 mol%) and the number of amine nitrogen atoms (6-1000000), which changes the dye's interaction properties with fabric to improve deposition under domestic laundry conditions

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite structure by covalently binding reactive dye molecules to polyethyleneimine polymer chains, forming a dye polymer that combines the properties of both components to achieve improved deposition on fabrics

Inventive Principle:

Principle #40Composite materials

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

The described dye polymer exhibits improved deposition on textiles, enhancing the whiteness of white fabrics and providing effective staining resistance.

Implementation Method 1

a polyethylene imine covalently bound to a reactive dye

Methodology Applied

Scientific EffectCovalent bonding: Chemical Bonding

Implementation Method 2

from 20 to 98 mol%, more preferably 57 to 95 mol%, most preferably 57 to 91 mol%, of the totality of the protons of the primary and secondary amine nitrogen atoms of the unsubstituted polyethylene imine are substituted by ethyl alcohol groups

Methodology Applied

Scientific EffectChemical substitution: Chemical Bonding