The viscosity of HPMC shapes properties such as water-retaining ability, thickening effect, and retarding performance. Thus, it is a crucial indicator for evaluating and selecting HPMC.
Before discussing the viscosity of HPMC, it is important to note that even for the same solution, results can vary depending on testing methods. There are some common methods to measure HPMC viscosity including Brookfield, Hakke, and Hoppler. The instruments, solution concentrations, and testing environments involved in these methods are different. Therefore, when assessing the viscosity of an HPMC polymer, ensure that details such as rotor type, temperature, and solution concentration are taken into account.
Take LANDERCOLL K200, the TDS points that its viscosity of 65,000-80,000 mPas is obtained using  Brookfield-RV under a 2% solution at 20℃.

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HPMC is susceptible to degradation by cellulase, an enzyme produced by fungi, bacteria, and protozoans that catalyze cellulolysis. When cellulase attacks HPMC, it primarily targets the unetherified glucose units in the HPMC structure. As a linear polymer, HPMC faces a sharp decline in viscosity once a glucose unit is damaged. However, such enzymes find it difficult to degrade the molecular chain if glucose units are etherified. Therefore, the higher the degree of etherification substitution (DS value) of HPMC, the more stable it is.

The content of active ingredients in HPMC is directly proportional to its cost-effectiveness, which means better performance at the same dosage. The active ingredient in HPMC is etherified cellulose, an organic substance. Its content can be measured by the ash content from calcined HPMC. Generally, a higher ash value indicates a lower content of active ingredients. In the TDS of LANDERCOLL HPMC, you could see the ash content is no more than 5%, implying the high purity of our products.

The ultimate buyer’s guide for your Hydroxypropyl Methyl Cellulose(HPMC,MHPC) used in contruction purchasing

The ultimate buyer’s guide for your Hydroxypropyl Methyl Cellulose(HPMC,MHPC) used in contruction purchasing

When purchasing Hydroxypropyl Methyl Cellulose (HPMC or MHPC) for construction applications, it’s essential to consider several factors to ensure that you select the right product for your specific needs. Here’s the ultimate buyer’s guide for purchasing HPMC for construction:

1. Application Requirements:

• Identify the specific construction applications for which you need HPMC, such as tile adhesives, cementitious mortars, renders, grouts, self-leveling compounds, or plastering materials.
• Understand the performance requirements of your application, including adhesion, water retention, workability, sag resistance, setting time, and durability.

2. Grade and Specifications:

• Choose the appropriate grade of HPMC based on your application requirements and performance criteria.
• Consider the viscosity grade, particle size distribution, degree of substitution, and other specifications that match your formulation and processing needs.

3. Quality and Purity:

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• Ensure that the HPMC meets quality standards and specifications relevant to your construction application.
• Verify the purity and consistency of the HPMC to ensure reliable performance and compatibility with other ingredients in your formulation.

4. Supplier Selection:

• Choose a reputable and reliable supplier with a track record of providing high-quality HPMC for construction applications.
• Consider factors such as product availability, lead times, technical support, customer service, and after-sales support.

5. Technical Support and Expertise:

• Look for suppliers who offer technical support and expertise to assist you in selecting the right HPMC for your construction project.
• Seek advice on formulation optimization, dosage recommendations, compatibility testing, and troubleshooting.

6. Regulatory Compliance:

• Ensure that the HPMC complies with relevant industry standards, regulations, and certifications applicable to your construction application.
• Verify that the supplier provides documentation and certification of compliance with quality and regulatory requirements.

7. Cost and Value:

• Evaluate the cost-effectiveness of the HPMC based on its performance, quality, and suitability for your construction application.
• Consider the total cost of ownership, including product price, shipping, storage, and any additional services or support provided by the supplier.

8. Samples and Trials:

• Request samples of the HPMC for testing and evaluation in your construction formulations.
• Conduct trials and performance tests to assess the suitability, compatibility, and performance of the HPMC in your specific application.

9. Feedback and Reviews:

• Seek feedback and reviews from other construction professionals, contractors, or colleagues who have experience with the HPMC supplier and product.
• Consider testimonials, case studies, and references to gauge the reputation and reliability of the supplier and product.

By considering these factors and following this buyer’s guide, you can make informed decisions when purchasing Hydroxypropyl Methyl Cellulose (HPMC or MHPC) for construction applications. Choosing the right HPMC supplier and product ensures optimal performance, reliability, and success in your construction projects.

If you are looking for more details, kindly visit HPMC solubility chart.

Post time: Mar-18-