Polyol-Guanidine Antibacterial Polymer for Wash-Resistant Protection

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Solution Overview

Problem

Existing antibacterial agents, particularly those containing guanidine structures, suffer from issues such as insufficient water resistance, detergent resistance, and environmental toxicity, which affect their suitability for materials exposed to water and detergents, and they often require complex preparation processes.

Innovation Solution

A novel antibacterial polymer is developed through the polymerization of non-toxic polyols and guanidine salts, enhancing heat, water, and detergent resistance while maintaining antibacterial efficacy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If organic antibacterial agents (quaternary ammonium salts, ethers, phenols, thiazoles, diphenyl ether compounds) are used, then fast sterilization speed and broad antibacterial spectrum are achieved, but heat resistance, water resistance, and chemical resistance are poor, resulting in short antibacterial validity period

Engineering Contradiction:

Improvesterilization speedVSAvoidantibacterial validity period

Core Design Contradiction:

SpeedVSReliability

Solution Approach 1:

The patent modifies the chemical structure of the antibacterial agent by changing the polyol component from traditional organic antibacterial agents to polyols with specific molecular structures (containing oxygen atoms in specific positions), which changes the physical and chemical parameters of the material to achieve both fast sterilization and long-lasting antibacterial effect under various conditions

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite antibacterial polymer by combining polyols with guanidine salts through polymerization reaction, forming a new material system that integrates the antibacterial properties of guanidine with the stability and resistance properties of the polyol backbone structure

Inventive Principle:

Principle #40Composite materials

2Reliability

If existing antibacterial masterbatches containing guanidine structure are used, then good anti-mildew effect is achieved, but water resistance and washing resistance are insufficient due to water solubility of guanidine structure

Engineering Contradiction:

Improveanti-mildew effectVSAvoidwater resistance

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces polyol as an intermediary carrier that binds to the guanidine salt through polymerization, creating a stable complex structure where the polyol backbone provides water resistance while the guanidine groups maintain antibacterial activity, effectively mediating between the conflicting requirements of water resistance and anti-mildew effect

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent develops a composite polymer structure combining polyol and guanidine salt through chemical bonding, where the composite material exhibits synergistic properties: the polyol component provides water and detergent resistance while the guanidine component provides antibacterial and anti-mildew effects

Inventive Principle:

Principle #40Composite materials

3Reliability

If polyamines are used as raw materials in antibacterial masterbatches, then antibacterial properties are achieved, but toxic/irritating raw materials are used, making waste water not good for environmental protection and possible residues irritating to human skin

Engineering Contradiction:

Improveantibacterial propertiesVSAvoidenvironmental toxicity

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent replaces toxic polyamines with non-toxic polyols that can be easily degraded and disposed of environmentally, using safer raw materials that maintain antibacterial functionality without the harmful environmental and health effects associated with polyamine-based masterbatches

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent converts the potentially harmful polyamine structure into a beneficial non-toxic polyol structure through material substitution, maintaining the essential antibacterial function while eliminating the toxic and irritating properties, thereby turning a harmful material system into a safe and environmentally friendly one

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 new polymer exhibits improved resistance to water and detergents, maintaining antibacterial performance even after repeated washing and exposure to hot water, making it suitable for applications in plastics and fibers.

Implementation Method 1

a novel antibacterial polymer is developed through the polymerization of non-toxic polyols and guanidine salts

Methodology Applied

Scientific EffectPolymerization: Chemical Bonding

Data Source

PatentEP3865530B1Antibacterial polymer and preparation method therefor

Publication Date: 2026.03.11 GUILIN ZHEQI TECH CO LTD

AI summary

The present invention provides an antibacterial polymer and a preparation method thereof. The antibacterial polymer is obtained by polymerization of a polyol and a guanidine salt, and has the following structure: In the preparation method, non-toxic and non-irritating polyols are used as raw materials, which are friendly to the environment and the human body.