High-viscosity starch ether is a functional additive commonly used in water-based coatings, adhesives, inks, building materials and other fields. It mainly combines starch molecules with etherified groups to give starch more stable properties and improve its application effect in different industrial fields.
The role of high-viscosity starch ether
The main role of high-viscosity starch ether is as a thickener. It can significantly increase the viscosity of the solution or slurry and improve the rheological properties. In water-based coatings and adhesives, the addition of high-viscosity starch ether can make the coating easier to apply during the application process, while avoiding the material from flowing too fast or dripping, ensuring the uniformity and stability of the coating.
Water retention High-viscosity starch ether can significantly improve the water retention of the system. This is crucial for the construction of cement, gypsum and other building materials. By controlling the release rate of water, the construction time can be effectively extended, the drying can be avoided too quickly, the workability can be improved, and the quality of the final product can be ensured.
Improving suspension In coatings, inks and other products, the addition of high-viscosity starch ether can help disperse and suspend solid particles and prevent precipitation and stratification. This effect is particularly important during the production and storage process, and can ensure the long-term stability and consistency of the product.
Improve coating performance High viscosity starch ether can improve the thickness, hardness and wear resistance of the coating. In some special coating or adhesive formulations, adding an appropriate amount of high viscosity starch ether can improve the adhesion and weather resistance of the coating.
Reduce stratification and dripping In liquid products, especially coatings and adhesives, the addition of high viscosity starch ether can effectively reduce stratification and dripping, improve product stability and user construction experience. It can help control the fluidity of the product in different environments and avoid the coating from being difficult to operate due to low viscosity.
Thickening and antifreeze performance In some products that need to be used in low temperature environments, high viscosity starch ether also has the effect of improving antifreeze performance. It can effectively prevent coatings, adhesives, etc. from freezing or failing under low temperature conditions, and ensure the normal use of the product.
Addition amount and effect of high viscosity starch ether
The effect of addition amount The addition amount of high viscosity starch ether directly affects the rheological properties, stability and final use effect of the product. In actual production, the selection of addition amount needs to be determined according to the requirements of specific products.
Low addition (0.1%-1%): In some products with low viscosity requirements, low addition of high viscosity starch ether can provide basic thickening effect. At this time, it mainly plays the role of stabilizing the suspension system and improving workability and rheological properties.
Medium addition (1%-3%): In applications where product rheology needs to be improved and coating or adhesive performance needs to be improved, medium addition of high viscosity starch ether will produce a more obvious thickening effect. This addition amount can usually ensure construction performance while also making the coating or adhesive have better fluidity and ductility.
High addition (more than 3%): When it is necessary to significantly increase viscosity or water retention, high addition of high viscosity starch ether can provide stronger thickening effect and better stability. However, too high addition may cause the fluidity of the coating or adhesive to be too low, affecting the coating effect, so it needs to be used with caution.
Risks of overuse Although high-viscosity starch ethers can effectively improve the viscosity and stability of products, excessive addition will bring a series of negative effects:
Reduced fluidity: Too much thickener will lead to excessive system viscosity, poor fluidity of coatings or adhesives, and affect the coating performance and efficiency during construction.
Increased cost: The increased use of high-viscosity starch ethers will directly increase the cost of raw materials, especially in large-scale production, this part of the cost cannot be ignored.
Uneven distribution: Too much high-viscosity starch ether may cause uneven distribution in the product, local thickening, and thus affect the uniformity and appearance quality of the final product.
High-viscosity starch ethers play an important role in many industrial applications, mainly in thickening, water retention, improving suspension and coating performance. The selection of the amount of addition needs to be adjusted according to the specific application requirements. Appropriate use can optimize the performance of the product, while excessive use may bring side effects. Therefore, in actual production, it is necessary to reasonably control the addition amount of high-viscosity starch ether according to the characteristics and requirements of different products to achieve the best effect.
Post time: Feb-12-2025