Aqueous Urethane Resin with Aspartic Acid Ester
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Solution Overview
Problem
Conventional aqueous urethane resin compositions exhibit low reactivity and drying characteristics, particularly in low-temperature environments, making it difficult to form thick films effectively.
Innovation Solution
An aqueous urethane resin composition comprising hydrophilic polyol, water dispersible polyisocyanate, and aspartic acid ester with a secondary amino group, which improves reactivity and drying characteristics by enhancing dispersion stability and reaction rates, even at low temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If conventional aqueous urethane resin composition is used, then VOC reduction is achieved, but reactivity and drying characteristics are low
Solution Approach 1:
The patent combines hydrophilic polyol, water dispersible polyisocyanate, and aspartic acid ester having a secondary amino group to create a composite aqueous resin composition. This composite approach allows the system to maintain water-based low-VOC properties while the aspartic acid ester component provides enhanced reactivity and drying characteristics that conventional aqueous systems lack.
Solution Approach 2:
The patent modifies the chemical composition parameters by introducing aspartic acid ester with secondary amino groups into the aqueous system. This parameter change transforms the resin composition from low-reactivity conventional aqueous urethane to a high-reactivity formulation that maintains water-based advantages while achieving improved drying characteristics.
2Object-generated harmful factors
If conventional aqueous urethane resin composition is used, then environmental friendliness is improved, but drying characteristics under low-temperature environment deteriorate
Solution Approach 1:
The composite formulation combining hydrophilic polyol, water dispersible polyisocyanate, and aspartic acid ester creates a synergistic system that maintains environmental friendliness through water-based composition while the aspartic acid ester component specifically addresses low-temperature drying performance, enabling effective application in winter conditions.
Solution Approach 2:
By changing the chemical composition to include aspartic acid ester with secondary amino groups, the patent modifies the reaction kinetics parameters of the system, enabling the resin to maintain high reactivity and drying characteristics across a broader temperature range including low-temperature environments.
3Object-generated harmful factors
If conventional aqueous urethane resin composition is used, then water-based formulation is achieved, but film-forming capability for thick application is poor
Solution Approach 1:
The patent creates a composite aqueous resin system where the combination of hydrophilic polyol, water dispersible polyisocyanate, and aspartic acid ester works synergistically to enable thick film application. The aspartic acid ester component specifically enhances the film-forming capability, allowing the water-based formulation to achieve proper curing and film integrity even at high application thicknesses.
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 achieves high reactivity and excellent drying characteristics, enabling the easy formation of thick films, suitable for applications in paint, adhesive, and sealant, with improved mixing stability and handling properties.
Implementation Method 1
aspartic acid ester having a secondary amino group is a hydrogen compound with a high activity, it easily reacts with isocyanate
Implementation Method 2
aspartic acid ester having a secondary amino group (C) in an urethane resin composition consisting mainly of hydrophilic polyol (A) and containing water dispersible polyisocyanate (B)... dispersion stability was able to be improved when used concomitantly with hydrophilic polyol
Data Source
Figure 1
AI summary
(C) Aspartic acid ester having a secondary amino group