2-Oxazoline Aqueous Dispersion for Stable High-Pressure Coating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional resin emulsions with 2-oxazoline groups exhibit insufficient mechanical stability when sprayed at high pressure, leading to aggregate formation and nozzle clogging, which affects productivity in coating processes.
Innovation Solution
An aqueous dispersion containing a polymer with 2-oxazoline groups and a surfactant comprising a sulfuric acid ester compound, with specific chemical structures, is used to enhance mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the aqueous resin composition is sprayed at higher pressure to perform coating in a shorter period of time, then the coating speed is improved, but the resin emulsion produces aggregates leading to nozzle clogging
Solution Approach 1:
The patent changes the chemical composition parameters of the surfactant system by incorporating a specific sulfuric acid ester compound with defined molecular structure (R1—O—(R2O)nSO3X where R1 is C8-C20 aliphatic hydrocarbon, R2 is C2-C4 alkylene, and n is 2-15). This parameter change in surfactant composition improves mechanical stability and prevents aggregate formation during high-pressure spraying, enabling both high coating speed and reliable performance
Solution Approach 2:
The patent creates a composite surfactant system combining the sulfuric acid ester compound with other surfactants in a specific ratio (50-100% by mass of the sulfuric acid ester compound relative to total surfactant). This composite approach synergistically enhances the mechanical stability of the resin emulsion, preventing aggregation under high-shear conditions while maintaining coating efficiency
Data Source
AI summary
An aqueous dispersion including a polymer having a 2-oxazoline group; and a surfactant, the surfactant containing a sulfuric acid ester compound represented by the following Chemical Formula (S):R1—O—(R2O)nSO3X (S)wherein R1 represents an aliphatic hydrocarbon group having 8 to 20 carbon atoms; R2 represents an alkylene group having 2 to 4 carbon atoms; n represents 2 to 15; and X represents a monovalent cation.