Microbial-Resistant Dispersant Composition for Biocide-Free Paints
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Solution Overview
Problem
Existing biocides like isothiazolinones, used in architectural coatings, are being restricted due to health concerns, necessitating a biocide-free preservative solution for paint formulations.
Innovation Solution
A composition comprising 50-90% water, 9-45% carboxylic acid functionalized dispersant, and 0.5-10% compound of Formula I, with a pH of 8-11, which includes carboxylic acid functionalized polymers and specific surfactants, provides preservative properties without biocides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If isothiazolinones are used as preservatives in architectural coatings, then microbial growth is inhibited, but health concerns and regulatory restrictions arise
Solution Approach 1:
The patent removes harmful biocides from the formulation entirely, extracting only the necessary preservative function through alternative means (dispersant system) that does not rely on toxic substances like isothiazolinones
Solution Approach 2:
The dispersant system acts as an intermediary mechanism that indirectly provides preservative effects through microbial resistance, rather than directly killing microorganisms with biocides
2Object-affected harmful factors
If biocides are removed from paint formulations, then health safety improves, but preservative properties are lost
Solution Approach 1:
The dispersant system performs multiple functions simultaneously: it provides dispersion, stabilization, and preservative properties through microbial resistance, eliminating the need for separate biocide additives
Solution Approach 2:
The dispersant system self-provides preservative functionality through its inherent microbial-resistant properties, without requiring additional biocide components
3Device complexity
If traditional dispersants are used without biocides, then formulation simplicity increases, but microbial resistance is insufficient
Solution Approach 1:
The patent modifies the dispersant's chemical parameters by incorporating specific functional groups (carboxylic acid groups with pKa 4-7) that confer microbial-resistant properties while maintaining dispersant functionality
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 composition effectively inhibits microbial growth in paint formulations, demonstrating high resistance to bacteria, yeast, and mold, even in the absence of biocides, thus preserving the formulation's integrity.
Implementation Method 1
wherein the composition has a pH in the range of from 8 to 11
Implementation Method 2
b) from 9 to 45 weight percent of a carboxylic acid functionalized dispersant; c) and from 0.5 to 10 weight percent of a compound of Formula I
Data Source
AI summary
The present invention relates to a composition comprising water, a carboxylic acid functionalized dispersant and a compound of Formula (I): where R, R1, x, and y are as defined herein. The composition of the present invention is useful as a biocide-free additive for pre-paint formulations.