HPMC is an odorless, white transcalent color powder of versatile and widely used polymer in the construction industry.
It is a non-ionic cellulose ether that is derived from natural polymer cellulose through a series of chemical modifications. HPMC is typically in the form of a white to off-white powder and is soluble in water.
What are the Characteristics of HPMC in the Construction Industry?
Water Retention: HPMC enhances the water retention capacity of construction materials, preventing them from drying out too quickly. This is particularly useful in cement-based products, such as mortar and plaster, where maintaining proper hydration is crucial for optimal performance.
Workability: HPMC improves the workability and consistency of construction materials, making them easier to mix and apply. This is important for achieving uniformity and desired properties in products like tile adhesives, grouts, and self-leveling compounds.
Adhesion: It provides good adhesion to various surfaces, promoting better bonding of construction materials. This is beneficial in applications like tile adhesives and renders.
Slip Resistance: In tile adhesives and similar products, HPMC contributes to slip resistance, ensuring that tiles adhere securely to surfaces.
Thickening: HPMC acts as a thickening agent, adding viscosity to solutions or mixes. This is valuable in preventing sagging or dripping in vertical applications, such as wall coatings.
Setting Time Control: HPMC can influence the setting time of certain construction materials, allowing for adjustments based on specific project requirements.
How to use HPMC in the Construction Industry?
Wall Putty: HPMC in Pakistan is used as wall putty for exterior and interior layers before painting for a better life of the wall and paint.
Mortars and Renders: It is also used in mortar and render formulations to improve workability, adhesion, and water retention. It contributes to the overall performance of these materials.
Tile Adhesives and Grouts: HPMC is an essential component in tile adhesives and grouts, where it enhances the adhesion of tiles to substrates and provides the necessary consistency for application.
Self-Leveling Compounds: In self-leveling compounds, HPMC helps achieve the desired flow and leveling properties, ensuring a smooth and even surface.
Gypsum Products: HPMC is used in gypsum-based products like joint compounds and plaster to improve their performance characteristics, including workability and water retention.
Exterior Insulation and Finish Systems (EIFS): HPMC is incorporated into EIFS formulations to enhance the adhesion of the finish coat and improve workability during application.
Cementitious Products: It is employed in various cement-based products to control viscosity, improve water retention, and enhance overall performance.
Overall, HPMC’s versatility in modifying the properties of construction materials makes it a valuable additive in the industry, contributing to the quality and efficiency of various building products.
Read: Plastic Industry Insights: Navigating Trends and Innovations
What is the Difference Between HPMC, HEC, and MHEC in the Construction Industry?
In Pakistan, HPMC (Hydroxypropyl Methylcellulose), HEC (Hydroxyethyl Cellulose), and MHEC (Methyl Hydroxyethyl Cellulose) are all cellulose ethers used in the construction industry as additives in various building materials. While they share some similarities, there are key differences in their chemical structures and properties. Here’s a brief overview of the distinctions:
Chemical Structure:
HPMC (Hydroxypropyl Methylcellulose): It is derived from cellulose through the introduction of both hydroxypropyl and methyl groups. This modification enhances its water retention, thickening, and film-forming properties.
HEC (Hydroxyethyl Cellulose): This cellulose ether contains hydroxyethyl groups. It is known for its thickening and water retention capabilities. HEC is commonly used in water-based paints, adhesives, and personal care products.
MHEC (Methyl Hydroxyethyl Cellulose): MHEC is a cellulose ether that combines both methyl and hydroxyethyl groups. It is designed to offer a balance between the properties of HPMC and HEC.
Water Retention:
HPMC: Known for its excellent water retention properties, making it suitable for applications where prolonged hydration is desired, such as in mortars and renders.
HEC: Also provides good water retention but may not be as effective as HPMC in certain applications.
MHEC: Offers a balance between water retention and other properties, making it versatile for various construction applications.
Thickening Ability:
HPMC: Exhibits good thickening capabilities, contributing to improved workability in construction materials.
HEC: Known for its high thickening efficiency, making it suitable for applications where viscosity control is crucial.
MHEC: Combines the thickening properties of both methyl and hydroxyethyl groups.
Film Formation:
HPMC: Has film-forming properties, which can be advantageous in coatings and other applications where a protective film is desired.
HEC: This may also contribute to film formation, depending on the application.
MHEC: Offers film-forming properties similar to HPMC.
Applications in Construction:
HPMC: Widely used in mortars, renders, tile adhesives, and other cement-based products.
HEC: Commonly employed in water-based paints, adhesives, and some construction materials.
MHEC: MHEC in Pakistan is used in various construction applications where a balance between HPMC and HEC properties is desired.
Why viscosity of HPMC decrease, If ash content increases?
Unfortunately, in Pakistan, customers of HPMC have no in-depth knowledge of viscosity and the role of ash in the quality of HPMC. The viscosity of Hydroxypropyl Methylcellulose (HPMC) is influenced by several factors, and one of them is the ash content. Ash content refers to the inorganic residue left behind when a sample is combusted. In the case of HPMC, if the ash content increases, it means there is a higher concentration of inorganic impurities in the material.
The presence of ash or inorganic impurities can affect the performance of HPMC in solution, leading to a decrease in viscosity. Here are a few reasons why this might occur:
Disruption of Polymer Chains: Inorganic impurities can interfere with the polymer chains of HPMC, disrupting their structure. This interference can lead to a reduction in the polymer’s ability to form a stable, viscous solution.
Interactions with Water: HPMC relies on its ability to hydrate in water to form a viscous gel. Inorganic impurities may interfere with the hydration process, preventing the polymer from achieving its optimal molecular configuration for viscosity.
Ionic Interactions: Some inorganic impurities may introduce ions into the solution, and these ions can interfere with the non-ionic nature of HPMC. Ionic interactions can affect the electrostatic forces between polymer chains, leading to a decrease in viscosity.
Reduced Molecular Weight: Ash content might be associated with degradation or cleavage of the HPMC polymer chains. If the polymer chains are broken down into smaller fragments, the overall molecular weight of HPMC decreases, and this can result in reduced viscosity.
Chinese suppliers of HPMC usually did not guide properly and in Pakistan, we do not have enough labs to check the quality of HPMC, ash content, and viscosity.
It’s important to note that the specific reasons for a decrease in viscosity due to increased ash content can depend on the nature of the inorganic impurities present and their interactions with the polymer. Additionally, the processing conditions during the production of HPMC can also play a role in determining its properties.
In practical terms, when using HPMC in applications where viscosity is critical, it is essential to ensure the quality and purity of the HPMC raw material to avoid the negative effects associated with increased ash content. Quality control measures during the manufacturing process can help maintain the desired properties of HPMC for various applications in the construction industry.
Also Read: Plastic Industry Insights: Navigating Trends and Innovations
HPMC Chemical Price in Pakistan
As of May 2024, the average prices of HPMC in Pakistan are:
- 200,000 viscosity – 36,500 PKR
- 180,000 viscosity – 32,000 PKR
- 160,000 viscosity – 28,500 PKR
- 140,000 Viscosity – 25,000 PKR
- 120,000 Viscosity – 21,000 PKR
It may varies as per logistic prices and domestic supply and demand.
Hydroxypropyl Methylcellulose (HPMC) is a versatile compound used in various industries, including pharmaceuticals, construction, food, and cosmetics. In pharmaceuticals, it’s often utilized as a thickening agent, stabilizer, and emulsifier in drug formulations. In construction, it’s employed in cement-based products to improve workability, water retention, and adhesion.
The price of HPMC in Pakistan can be influenced by several factors:
- Raw Material Costs: HPMC is derived from cellulose, usually obtained from wood pulp or cotton linters. Fluctuations in the prices of these raw materials can impact the cost of producing HPMC.
- Manufacturing Processes: The complexity of the manufacturing process, including the degree of purification and modification, can affect production costs and, consequently, the price of HPMC.
- Market Demand and Supply: Changes in demand for HPMC products, influenced by factors such as industry trends, construction activities, and pharmaceutical requirements, can impact prices. Similarly, supply disruptions or fluctuations can affect pricing dynamics.
- Market Competition: The presence of multiple suppliers and manufacturers in the market can lead to competitive pricing strategies, influencing the overall price level.
- Currency Exchange Rates: For countries like Pakistan that import HPMC, fluctuations in currency exchange rates can affect import costs and, consequently, the selling price of HPMC products in the local market.
Download COA HPMC
To get the most accurate and current information on HPMC prices in Pakistan, please contact us so that we can provide insights into pricing trends and factors influencing them.
What are the different methods to check viscosity?
Brookfield Viscometer:
The Brookfield viscometer is widely used for measuring the viscosity of HPMC solutions. The instrument provides viscosity readings in centipoise (cPs). Different spindle speeds can be selected to measure viscosity at various shear rates.
Rotational Viscometers:
Rotational viscometers, including cone and plate or parallel plate rheometers, are suitable for measuring the viscosity of HPMC solutions. These instruments determine the torque required to rotate a spindle or plate in the sample, providing viscosity values.
Cone/Plate Rheometer:
Cone/plate rheometers assess the flow behavior of HPMC solutions under controlled conditions. This method involves rotating a cone or plate in the sample, and the resulting torque is measured to determine viscosity.
Cup and Bob Viscometers:
Cup and bob viscometers are suitable for measuring the viscosity of HPMC solutions. The cup is filled with the sample, and the bob is rotated to determine the viscosity based on the resistance to flow.
What are the different criteria for checking the viscosity of HPMC?
Viscosity is a critical property of Hydroxypropyl Methylcellulose (HPMC), especially in construction applications where it is commonly used as a thickening agent. Several criteria and methods are employed to check the viscosity of HPMC. Here are some key considerations:
Molecular Weight:
The molecular weight of HPMC can influence its viscosity. Higher molecular weight HPMC generally exhibits higher viscosity. Manufacturers often specify the range of molecular weights for their HPMC products.
Concentration of HPMC:
Viscosity is often dependent on the concentration of HPMC in a solution. Different concentrations may be tested to understand the rheological behavior of the polymer.
Temperature Dependency:
Viscosity is sensitive to temperature changes. Testing viscosity at different temperatures helps assess the temperature dependence of HPMC solutions. Manufacturers often provide temperature-specific viscosity data.
Shear Rate:
Understanding how viscosity changes with shear rate is crucial for applications involving flow, such as pumping or spraying. Rheological studies at different shear rates help characterize the behavior of HPMC.
pH of Solution:
The pH of the HPMC solution can influence its viscosity. Manufacturers may recommend specific pH ranges for optimal performance.
Intrinsic Viscosity:
Intrinsic viscosity is a parameter calculated from the concentration dependence of viscosity. It provides information about the molecular size and shape of HPMC.
What is the role of viscosity in the quality of HPMC?
It’s essential to refer to the specific testing methods recommended by the manufacturer of the HPMC product, as different products may have different specifications and testing requirements. Additionally, industry standards such as those from ASTM International may provide guidelines for viscosity testing in various applications.
How much ash content is acceptable for the construction industry of HPMC in Pakistan?
It is entirely dependent on the application and use of HPMC in the construction industry. In Pakistan, HPMC with viscosity of 150,000 and 200,000 cps is famous. Ash content of less than 2% with a Viscosity of more than 200,000 CPS and Ash content of less than 5% and a viscosity of more than 150,000 CPS is used for Wall putty, cement mixture, and adhesive is widely used.
What is the best way to use HPMC for construction applications?
Using Hydroxypropyl Methylcellulose (HPMC) in Pakistan, in construction applications requires careful consideration of the specific requirements of the project and the desired properties of the construction material. Here are some general guidelines on the best way to use HPMC in construction applications:
How much HPMC should be added to in construction mixture?
Determine the appropriate dosage of HPMC based on the type of construction material and its intended application. The dosage can vary depending on factors such as the water-to-cement ratio, desired workability, and specific performance requirements. Tailor the use of HPMC based on the specific requirements of the construction application. For example, in mortars, renders, or tile adhesives, the water retention and workability aspects may be crucial, while in coatings, film formation and adhesion properties may be more critical.
What is the best way to mix HPMC before application?
Add HPMC gradually to the mixing water while stirring to ensure proper dispersion and avoid the formation of lumps.
Allow sufficient time for HPMC to hydrate before incorporating it into the dry mix. This hydration period is crucial for the polymer to achieve its full thickening and water retention potential.
Follow industry standards and guidelines for the use of HPMC in construction materials. This may include recommendations from organizations such as ASTM International or specific guidelines provided by manufacturers.
How to check the quality of Raw Materials and suppliers for HPMC?
Ensure the quality of the HPMC raw material by sourcing it from reputable suppliers. The purity and consistency of the HPMC can significantly impact its performance in construction applications.
Implement testing and quality control procedures to monitor the performance of construction materials containing HPMC. This can involve regular testing of properties such as viscosity, water retention, and workability.
Consult with HPMC suppliers or technical experts to get guidance on the best practices for using their specific product in construction applications. Suppliers may provide valuable insights into dosage recommendations and application techniques.
How to store HPMC for best results?
Store HPMC in a cool, dry place to prevent moisture absorption, which can affect its performance. Follow the manufacturer’s recommendations for storage conditions.
What are the Safety Precautions for HPMC?
Adhere to safety guidelines when handling and incorporating HPMC into construction materials. Use appropriate personal protective equipment (PPE) and follow the Material safety data sheet (MSDS) information.
By carefully considering these factors and following best practices, you can optimize the use of HPMC in construction applications, leading to improved performance and the desired properties in the final construction material.
Which countries are best in producing HPMC?
The production of Hydroxypropyl Methylcellulose (HPMC) is distributed among several countries globally, with varying capacities and qualities. It’s important to note that market conditions, production costs, and prices can fluctuate, and the competitiveness of a country in terms of pricing may depend on various factors, including raw material costs, labor costs, and manufacturing efficiency. Here are some countries known for their HPMC production:
China: China is a major producer of HPMC and is known for its significant share in the global market. Many HPMC manufacturers in China, for both domestic and international markets, have affordable prices. The country’s large-scale production often contributes to competitive pricing. China and Pakistan have signed a Free Trade Agreement, hence customers of HPMC in Pakistan can get better custom tariffs on imports of HPMC in Pakistan.
India: India is another country with a notable presence in the HPMC market. Indian manufacturers produce HPMC for various applications, including the construction industry. Prices may be competitive due to factors such as lower labor costs.
United States: Some manufacturers in the United States also produce HPMC. While the U.S. may not be the largest producer globally, it has a presence in the market and can provide HPMC for various industries.
Europe: Several European countries, including Germany and Spain, have companies that produce HPMC. European manufacturers often focus on high-quality products and may cater to specific market segments.
South Korea: South Korea has companies involved in the production of cellulose ethers, including HPMC. These companies may serve both domestic and international markets.
It’s essential to consider factors beyond just the production country when evaluating HPMC prices. The specific grade and quality of HPMC, the manufacturer’s reputation for consistency and quality, and the quantity being purchased can all influence pricing.
For the most accurate and up-to-date information on HPMC prices and production, it is recommended to contact suppliers directly or consult industry reports and market analyses Contact Us:
What are the top brands of HPMC for construction?
Several companies are known for manufacturing high-quality Hydroxypropyl Methylcellulose (HPMC). Keep in mind that the competitive landscape may change, and new companies may emerge. Here are some well-known brands that have been recognized for their production of HPMC:
- DowDuPont (now Dow Inc.): Dow is a global chemical company that produces a wide range of products, including cellulose ethers like HPMC. They are known for providing high-quality construction chemicals.
- Ashland Inc.: Ashland is a specialty chemicals company that produces various products, including cellulose ethers. They offer HPMC under different trade names for applications in construction, pharmaceuticals, and other industries.
- Shin-Etsu Chemical Co., Ltd.: A Japanese company, Shin-Etsu, is a major producer of specialty chemicals, including cellulose ethers. They supply HPMC for use in industries such as construction, food, and pharmaceuticals.
- Zhejiang Kehong Chemical Co., Ltd.: A Chinese company, Zhejiang Kehong, is known for manufacturing cellulose ethers, including HPMC. They supply products for use in construction, pharmaceuticals, and other industries.
- Hebei Double Bulls Cellulose Co., Ltd. is a professional HPMC manufacturer in China, which was founded in 2009, with a total investment of CNY 380 million, covering 102 acres, with 190 employees and sixteen advanced production lines, the annual output of HPMC over 60,000 tons.
- Lotus Chemical Technology Co., Ltd.: A Chinese company specializing in cellulose ethers, Lotus Chemical offers HPMC for use in various applications, including construction and building materials.
- Jinzhou Guangdong Cellulose Co., Ltd.: This Chinese company is engaged in the production of cellulose ethers, and they provide HPMC for construction applications such as mortars and plasters.
- China Ruitai International Holdings Co., Ltd.: A company based in China, Ruitai International is involved in the production of cellulose ethers, including HPMC, for use in the construction industry.
When selecting an HPMC product, it’s essential to consider factors such as the specific requirements of your application, the desired properties of the HPMC, and any industry standards or regulations that may apply. Additionally, verifying the latest information from suppliers, industry publications, or trade associations can provide insights into the current landscape of HPMC manufacturers.
How many quality grades are available for HPMC in Pakistan?
There are mostly three grades available of HMPC in Pakistan.
Grade A: more than 200,000 cps viscosity of HPMC in Pakistan for wall putty
Grade B: 200,000 cps viscosity of HPMC in Pakistan for Tile adhesive
Grade C: 150,000 cps viscosity of HPMC in Pakistan for construction mixture
Where can I buy good quality HPMC in Pakistan?
There are many distributors agents and wholesale traders of HMPC in Pakistan
Tianjin Union International is the sole agent of Double Bulls HPMC in Lahore
+923334502503 Email: aqeel@tjunilion.pk
Shahameer Traders is a trader and wholesaler of HPMC in Karachi and Lahore
+923456444104 Email: shahameertraders@gmail.com
Accrete International mainly deals in bulk HPMC in Islamabad/Rawalpindi
+923215838362
