Calcium Carbonate Particulate Material for Paint Stability
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Solution Overview
Problem
Calcium carbonate particulate materials used in paint compositions with high pH values often experience gel formation and significant viscosity increase, making them unprocessable and leading to microbial growth, which can result in aesthetic and physical degradation of coatings, while the use of organic biocides is regulated and undesirable.
Innovation Solution
A calcium carbonate particulate material with a low content of water soluble magnesium ions, achieved by heating the material to between 65°C and 200°C for up to 24 hours, which reduces water soluble magnesium ions to less than 200 ppm, thereby stabilizing paint compositions and preventing gel formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If calcium carbonate particulate material is used in paint compositions with high pH value, then microbial growth is prevented, but gel formation occurs leading to significant viscosity increase
Solution Approach 1:
The patent applies parameter changes by heating the calcium carbonate particulate material to temperatures between 65°C and 200°C for up to 24 hours. This thermal treatment modifies the material's properties by reducing water-soluble magnesium ion content to less than 200 ppm, which prevents gel formation in high pH paint compositions while maintaining the ability to resist microbial growth.
Solution Approach 2:
The patent converts the harmful effect of water-soluble magnesium ions (which cause gel formation and viscosity increase) into a beneficial outcome by removing them through controlled heating. The harmful magnesium ions are transformed into a benefit by their elimination, allowing the calcium carbonate to be used in high pH paint compositions without processing issues.
2Ease of operation
If all by-products are removed from calcium carbonate particulate material, then gel formation and viscosity increase are prevented, but manufacturing cost and ecological feasibility are reduced
Solution Approach 1:
The patent uses parameter changes by applying controlled thermal treatment at 65°C to 200°C for up to 24 hours. This selective parameter change removes water-soluble magnesium ions to less than 200 ppm through a feasible manufacturing process that balances purification with economic and ecological considerations, making the material suitable for paint applications.
Solution Approach 2:
The patent implements continuous heating treatment over an extended period (up to 24 hours) to gradually and effectively remove water-soluble magnesium ions. This continuous process ensures thorough purification while maintaining manufacturing feasibility, achieving a balance between removal efficiency and production practicality.
3Reliability
If organic biocides are added to paint composition, then microbial growth is prevented, but ecological compliance and customer acceptance are reduced
Solution Approach 1:
The patent eliminates water-soluble magnesium ions (a harmful substance causing gel formation) through thermal treatment, and in doing so, creates a paint composition that can rely on high pH for microbial protection without needing organic biocides. The removal of harmful magnesium ions benefits the system by enabling an eco-friendly approach to microbial resistance.
Solution Approach 2:
The patent enables the paint composition to protect itself against microbial growth through its high pH value, without requiring external organic biocides. The calcium carbonate particulate material with reduced magnesium ion content supports the high pH environment, allowing the system to be self-sufficient in preventing microbial growth in an ecologically compliant manner.
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 low water soluble magnesium content in the calcium carbonate particulate material enhances the stability of paint compositions, preventing viscosity increases and microbial growth, allowing for the use of calcium carbonate as an eco-friendly alternative in high pH paint compositions without the need for organic biocides.
Implementation Method 1
heating the material to between 65°C and 200°C for up to 24 hours
Data Source
AI summary
The present disclosure relates to a calcium carbonate particulate material comprising less than about 200 ppm of water soluble magnesium ions based on the total amount of the calcium carbonate particulate material, wherein the amount of water soluble magnesium ions is determined using the method described herein. The present disclosure further relates to methods for preparing the calcium carbonate particulate materials according to the invention and to paint compositions comprising the calcium carbonate particulate materials according to the present disclosure or the calcium carbonate particulate materials obtainable by the methods according to the present disclosure.