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Moreover, cement bonding additives can significantly improve the water resistance of cement-based materials. In locations with high humidity or moisture exposure, traditional cement can become weak and susceptible to damage. Additives containing hydrophobic properties can help repel water, keeping the structure intact and preventing issues such as corrosion, mold growth, and efflorescence. This water-resistant characteristic not only prolongs the lifespan of the construction but also reduces maintenance costs.
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4. Specialty Grades There are also specialty grades of HPMC developed for niche applications. For instance, HPMC with a low degree of substitution is used in controlled-release drug formulations, where precise release profiles are crucial. Additionally, HPMC can be modified to enhance its performance in specific applications, such as heat-resistance in food processing or improved water retention in agricultural products.
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2. Water Retention HPMC is known for its excellent water retention capabilities. In skim coat formulations, it helps retain moisture during the curing process, thereby preventing premature drying. This is crucial in ensuring a strong bond between the skim coat and the substrate, reducing the likelihood of cracking and peeling over time.
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