An Aqueous Polymer Dispersion
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Solution Overview
Problem
Existing carpet adhesives have poor water resistance and stability, which affects their performance in bonding applications.
Innovation Solution
An aqueous dispersion comprising ethylene-vinyl ester copolymers, protective colloids, nonionic and ionic surfactants, and thickeners, with specific ratios and components to enhance water resistance and stability, is developed for use in carpet bonding compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the amount of protective colloid and surfactant is increased to improve stability, then stability is improved, but water resistance deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the amounts of protective colloid (0.1-2.0 pphm) and surfactants (ionic: 0.01-0.5 pphm, nonionic: 0.1-3.0 pphm) within specific ranges. This quantitative optimization resolves the contradiction by finding the optimal balance point where stability is sufficient while water resistance is maximized, rather than simply increasing all additive amounts.
Solution Approach 2:
The patent uses a composite approach by combining multiple types of additives (protective colloid, ionic surfactant, nonionic surfactant) in specific proportions. The synergistic effect of these composite components achieves both stability and water resistance simultaneously, resolving the contradiction through material composition optimization.
2Reliability
If the amount of protective colloid is reduced to improve water resistance, then water resistance is improved, but stability deteriorates
Solution Approach 1:
The patent applies parameter changes by setting the protective colloid amount within a specific range (0.1-2.0 pphm) rather than minimizing it completely. This optimized parameter range maintains sufficient stability while achieving improved water resistance compared to conventional formulations with higher protective colloid amounts.
Solution Approach 2:
The patent compensates for reduced protective colloid by introducing a composite system including ionic surfactants (0.01-0.5 pphm) and nonionic surfactants (0.1-3.0 pphm). This composite additive system maintains stability functions while the overall composition achieves better water resistance.
3Ease of operation
If surfactants are added to improve workability, then workability is improved, but water resistance deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling surfactant concentrations (ionic: 0.01-0.5 pphm, nonionic: 0.1-3.0 pphm) within narrow ranges. This optimization ensures sufficient workability improvement while minimizing the negative impact on water resistance, resolving the contradiction through quantitative balance.
Solution Approach 2:
The patent uses a composite surfactant system combining ionic and nonionic types in specific ratios. This composite approach provides synergistic workability enhancement while the balanced composition maintains water resistance, resolving the contradiction through material combination optimization.
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 solution provides improved water resistance and stability, as evidenced by increased wet bonding strength and suitable viscosity for effective carpet bonding, particularly in tufted broadloom carpets.
Implementation Method 1
Component (b) one or more protective colloids, optional component (c1) one or more nonionic surfactants, and optional component (c2) one or more ionic surfactants
Implementation Method 2
Component (b) one or more protective colloids
Implementation Method 3
Component (a) one or more ethylene-vinyl ester copolymers
Implementation Method 4
optional component (d) one or more thickeners
Data Source
AI summary
Aqueous dispersions and uses for the same. The aqueous dispersion includes a component (a) of one or more ethylene-vinyl ester copolymers, a component (b) of one or more protective colloids, a component (el) of one or more nonionic surfactants, and a component (d) of one or more dispersants, selected from polycarboxylates. Where an amount of the component (b) and the component (c1) is less than or equal to 3.4 pphm, preferably between 1-3.4 pphm, more preferably between 2-3.1 pphm. Where the weight ratio of an amount of the component (b) to the component (el) is between 1.01-2 and an amount of the component (d) is less than or equal to 1 pphm. The component (b) is polyvinyl alcohol (PVOH).