Amidoamine Dispersants for Universal Solid Dispersion
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Solution Overview
Problem
Current wetting agents and dispersants lack universality in dispersing a broad spectrum of solids, particularly leading to inadequate dispersion and reagglomeration issues, which result in unwanted effects like increased viscosity, color drift, and loss of gloss in coatings, and reduced mechanical strength in plastics.
Innovation Solution
Development of reaction products containing amido amine groups, specifically formulated to act as high-quality wetting agents and dispersants, capable of effectively dispersing solids with acidic, neutral, and basic surfaces, and exhibiting excellent compatibility with various binders and coating materials, thereby preventing flocculation and reducing millbase viscosity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional wetting agents and dispersants are used, then some dispersion tasks are accomplished, but universality across different solids is limited
Solution Approach 1:
The patent applies universality by designing a dispersant with multiple functional groups (amido, amine, hydroxyl, carboxyl) that can interact with different types of solids (acidic, neutral, basic surfaces) through various mechanisms, allowing one compound to perform multiple dispersion tasks across diverse material systems including pigments, fillers, and fibers
Solution Approach 2:
The dispersant functions as a composite molecular structure combining different functional moieties (amido groups from step 1, amine groups from step 2, plus hydroxyl and carboxyl groups) that work synergistically to provide both broad applicability and reliable dispersion stability across various solid-liquid systems
2Manufacturing precision
If high mechanical forces are applied to disperse solids, then deflocculation is achieved, but dispersion time and energy input increase
Solution Approach 1:
The dispersant acts as a mediator between solid particles and liquid medium, adsorbing onto particle surfaces through its functional groups and providing steric and electrostatic repulsion that prevents reagglomeration, thereby achieving effective deflocculation with reduced mechanical energy input and shorter processing time
3Stability of the object's composition
If dispersants are added to prevent reagglomeration, then dispersion stability improves, but viscosity may increase
Solution Approach 1:
The dispersant modifies the interfacial parameters between solid particles and liquid medium by forming protective adsorption layers, changing the surface energy and interaction forces to prevent particle-particle attraction, thereby stabilizing dispersion without significantly increasing bulk viscosity
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 reaction products demonstrate universal usability as wetting agents and dispersants, ensuring stable dispersion and low viscosity in varnishes and plastics, allowing for high fill levels without stability issues, and are produced in a simple and economically viable process.
Implementation Method 1
at least one diisocyanate R2(NCO)2 is reacted with at least one monoalcohol Y—OH to form a urethane
Implementation Method 2
p urethanes of the general formula (III) are reacted with one or more components that introduce the Z1—(XH)y group to give a reaction product containing amido amine groups
Data Source
AI summary
A reaction product containing amido amine groups, comprising one or more species of the general formula (I)(R1—X)p—Z1—(XH)y (I)where p+y=w and w is an integer from 1 to 10, p is an integer from 1 to 10, y is an integer from 0 to 9, and X is independently O, NH and/or NZ2 and XH is independently a hydroxyl group OH, a primary amino group NH2 and/or a secondary amino group NHZ2 where Z2 is independently a branched or unbranched, saturated or unsaturated organic radical G(U)a where U is independently a hydroxyl group, a primary amino group or a secondary amino group and a is an integer from 0 to 9, where p+y+a≤10, and G is a branched or unbranched, saturated or unsaturated organic radical, the p R1 radicals are independently a radical of the general formula (II)Y—O—CO—NH—R2—NH—CO (II)in which the p Y radicals are independently a branched or unbranched, saturated or unsaturated organic radical which has 1 to 1000 carbon atoms and does not contain any hydroxyl groups, any primary amino groups or any secondary amino groups, the p R2 radicals are independently a branched or unbranched, saturated or unsaturated organic radical having 6 to 20 carbon atoms,Z1 is a branched or unbranched, saturated or unsaturated organic radical containing at least two carbon atoms, having at least one amide group and at least one tertiary amino group.