Covalently Modified PHMG Resin for Antimicrobial Laminates
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Solution Overview
Problem
Current resin compositions for laminates and wood materials lack effective antimicrobial properties without compromising mechanical and optical performance, and existing antimicrobial additives often degrade, wash out, or interfere with the resin matrix, leading to reduced effectiveness and environmental concerns.
Innovation Solution
A solvent-free lacquer resin composition incorporating polyhexamethylene guanidine (PHMG) or polyhexamethylene biguanide (PHMB) covalently modified on primary amine groups, which are integrated into the resin matrix using epoxy resins or oligomeric diisocyanates, providing long-lasting antimicrobial protection without impairing mechanical or optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional resin compositions are used for laminate production, then mechanical strength and optical properties are maintained, but antimicrobial protection is insufficient and additives degrade or wash out
Solution Approach 1:
The patent combines the antimicrobial agent PHMG with the resin matrix through covalent bonding, merging two previously separate components into a unified structure. This integration ensures the antimicrobial agent remains stable and effective without degrading or washing out, while maintaining the mechanical and optical properties of the resin.
Solution Approach 2:
The patent creates a composite material system where PHMG is chemically integrated into the resin matrix. This composite structure provides both the mechanical/optical properties of the resin and the antimicrobial properties of PHMG, with the added benefit of enhanced stability due to the covalent bonding between components.
2Reliability
If antimicrobial additives are incorporated into resin compositions, then antimicrobial protection is improved, but the additives interfere with the resin matrix and reduce mechanical/optical properties
Solution Approach 1:
By merging PHMG with the resin matrix through covalent bonding, the invention creates a unified structure where the antimicrobial agent becomes an integral part of the resin. This eliminates interference between separate components while maintaining both antimicrobial effectiveness and the mechanical/optical properties of the resin.
Solution Approach 2:
The patent changes the chemical state of PHMG from a free additive to a covalently bonded component within the resin matrix. This parameter change in molecular integration transforms PHMG from a potentially interfering substance to a structurally integrated functional component that maintains resin performance.
3Reliability
If solvent-free lacquer resin composition with covalently modified PHMG is used, then lasting antimicrobial effect is achieved, but manufacturing complexity increases
Solution Approach 1:
The patent performs the chemical modification of PHMG with epoxy resin or oligomeric diisocyanate in advance, before applying the composition to the substrate. This preliminary action creates a pre-modified PHMG compound that can be directly incorporated into the resin matrix without requiring complex in-situ modification equipment or processes.
Solution Approach 2:
The epoxy resin or oligomeric diisocyanate acts as an intermediary substance that facilitates the covalent bonding between PHMG and the resin matrix. This intermediary enables the formation of stable chemical bonds without requiring complex manufacturing equipment, as the chemistry occurs through standard polymerization reactions.
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 solvent-free lacquer resin composition achieves a lasting antimicrobial effect while maintaining excellent mechanical strength, transparency, and optical appearance, even under high hygiene and usage conditions, with the antimicrobial agents remaining stable and fully integrated within the resin matrix.
Implementation Method 1
polyhexamethylene guanidine (PHMG) or polyhexamethylene biguanide (PHMB) covalently modified on primary amine groups, which are integrated into the resin matrix using epoxy resins or oligomeric diisocyanates
Data Source
AI summary
The invention relates to a resin composition comprising a polyhexamethyleneguanidine (PHMG) covalently modified at the primary amine groups and/or a polyhexamethylene biguanide (PHMB) covalently modified at the primary amine groups. The invention further relates to a resin coating obtainable by polymerization of the resin composition. Another object of the invention is an impregnating agent comprising i) the resin composition or the resin coating, and ii) an impregnating agent carrier material. Another object of the invention is a laminate comprising iii) a laminate carrier material and iv) the impregnating agent or the resin composition or the resin coating. A further object of the invention is a method for producing a laminate comprising i) applying the resin composition or the resin coating or the impregnating agent to a carrier material and ii) pressing the components from step i).Furthermore, the invention relates to the use of the resin composition or the resin coating in the manufacture of wood-based materials, impregnating agents and/or laminates.