Microspheres Thicken Peroxide Catalyst for Resin Mixing Precision
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Solution Overview
Problem
The existing methods for using unsaturated polyester resins in repairs lack precise control over the catalyzation process, leading to issues like loss of adhesion, cracking, discoloration, and outgassing due to improper mixing of peroxide hardener with the resin, which results in suboptimal performance and increased costs.
Innovation Solution
A two-part resin system is developed using microspheres as a thickening and volumetrically increasing agent to create a more controllable hardener composition, allowing for accurate measurement and mixing ratios, thereby stabilizing the peroxide catalyst and improving the curing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If peroxide catalyst is packaged in small tubes for manual dispensing, then the resin system is easy to package and distribute, but the mixing precision and catalyzation control are poor
Solution Approach 1:
The patent changes the viscosity parameter of the peroxide catalyst by adding thickeners (cellulose esters, hydrogenated castor oil, fumed silica) to transform it from a free-flowing liquid into a paste with controlled rheology. This allows the paste to be dispensed in controlled amounts while maintaining stability in the tube, resolving the contradiction between ease of packaging and mixing precision.
2Measurement precision
If peroxide viscosity is increased to improve dispensing control, then mechanical metering becomes easier, but the peroxide becomes difficult to dispense in non-spray applications
Solution Approach 1:
The patent introduces thixotropic agents (fumed silica, hydrogenated castor oil) that give the peroxide paste dynamic rheological properties. The paste remains thick and stable at rest for precise dispensing control, but becomes more fluid under shear stress during application, allowing it to be dispensed in non-spray applications despite its high viscosity.
3Device complexity
If manual dispensing of peroxide is used, then the application process is simple, but the catalyzation control and adhesion performance are poor
Solution Approach 1:
By changing the physical state of the peroxide from liquid to paste through viscosity modification, the patent enables manual dispensing to achieve controlled, consistent application rates. This improves catalyzation control and adhesion performance without requiring complex metering equipment, maintaining simplicity while enhancing reliability.
4Ease of manufacture
If liquid peroxide is used in traditional formulations, then the formulation is simple and成本低, but the volumetric control and application consistency are poor
Solution Approach 1:
The patent creates a composite peroxide paste by combining the liquid peroxide catalyst with thickening agents (cellulose esters, hydrogenated castor oil, and/or fumed silica). This composite material maintains the chemical functionality of the original peroxide while adding rheological control, achieving volumetric precision without complicating the formulation process.
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
This approach ensures accurate catalyzation, reduces common problems associated with unsaturated polyester repair products, enhances the product's value by improving adhesion, sag resistance, and stability, and allows for easier application and distribution, while maintaining cost-effectiveness.
Implementation Method 1
adding a thickening and volumetrically increasing agent, wherein the thickening and volumetrically increasing agent are microspheres
Data Source
AI summary
A method of making a thickened hardener composition useful in a two part resin system. The thickened hardener composition includes a carrier, a peroxide catalyst, and a thickening and volumetrically increasing agent, wherein the thickening and volumetrically increasing agent is microspheres. A method of making a thermoset resin from a two-part polyester resin system is also provided.