The application of functional anti-corrosion and anti-mildew agents in coatings
The application of functional anti-corrosion and anti-mildew agents in coatings
The lower the MIC value of the anti-mold and anti-bacterial agent, the higher its anti-mold and antibacterial performance and the better its application effect. The MIC value has become a fundamental piece of data for researchers, manufacturers and users of anti-mold and anti-bacterial agents to understand the effectiveness of the products.
The inhibition zone test is a method that uses preservatives and fungicides to continuously dissolve, and through the diffusion of agar to form different gradients. Based on the size of the inhibition zones displayed by different preservatives and fungicides on the surface of a specific culture medium for a certain type of bacteria, it determines the effectiveness of the preservatives and fungicides in preventing mold and inhibiting bacteria. The advantage of this method is that it is simple to operate and has good intuitiveness.
The minimum inhibitory concentration (MIC) experiment determines the minimum inhibitory concentration of a preservative or fungicide for a specific microorganism based on whether the test microorganism can grow and develop on the culture medium plates with various concentrations of the preservative or fungicide. This method is applicable to the detection of both insoluble and soluble preservatives or fungicides, and can better reflect the effectiveness of the preservative or fungicide. It is one of the most common expression methods for the inhibitory and killing performance of preservatives or fungicides at present.
The first two methods of the artificial environment mold growth test are direct testing methods for anti-corrosion and mold inhibitors, and are not applicable for testing the mold prevention efficacy of water-based coatings as anti-mold products. The artificial environment mold growth test is the most important and widely used method for determining the mold prevention efficacy of water-based coatings. This method simulates the environmental conditions for mold growth in nature and is designed based on the physiological characteristics of mold growth. It is used to determine the inhibitory effect of the paint film on mold under conditions suitable for mold growth. After the limitations of these products in terms of bactericidal spectrum and environmental biology were gradually understood, they have been gradually abandoned, and replaced by more safe, less toxic, and easier-to-operate modern mold prevention and bactericidal agents. To select an appropriate anti-corrosion and mold inhibitor, it is first required that it can meet the relevant requirements of the coating based on its characteristics.
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