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Hydroxypropyl methyl cellulose (HPMC) is a natural polymer materials as raw materials, through a series of chemical processing and prepared non-ionic cellulose. It contains almost methyl cellulose(MC) of all the performance, your first choice for production of high quality building materials additives.To meet the needs of environmental protection, Our product with high water retention, dispersion, good fineness, good work ability, easy dissolution characteristics.It suitable for dry mortar building, both inside and outside wall putty powder milk (cream), adhesives, caulks, interface agents, coatings, self-leveling agent of new building materials.

Product properties

1. Water Retention: The water retention will be enhanced, which is helpful with such problems as cement or gypsum construction material drying too fast and poor hardening or cracking due to insufficient hydration.

2. Operationality: It can enhance the plasticity of mortar and improve the coating efficiency in construction projects.

3. Adhesivity: It can make mortar attach to base material better since the plasticity of mortar is enhanced.

4. Slip Resistance: It can prevent slipping problem between mortar and the base material in construction project as a result of its thickening effect.

Physical & Chemical Properties

            Item 

                       Specification 

 

MC

HPMC

 

DN55

DN60

DN65

DN70 

DN75

Gel Tempreture (ºC)

50-55

58-64

59-68

68-75

70-90

Methoxyl Content (%)

27.5-31.5

28.0-30.0

17.0-22.0

16.5-20.0

19.0-24.0

Hydroxypropoxyl Content (%)

 

7.5-12.0

4.0-9.5

6.0-12.0

4.0-12.0

Moisture Content (%)

   

&#;5.0

   

Ash Content (%)

   

&#;4.0

   

PH Value

   

5.0-8.5

   

Viscosity Range

spec.

Viscosity Ranges(MPA.S)

 spec.

Viscosity Ranges (MPA.S)

5

4-9

-

15

10-20

-

25

Honglai are exported all over the world and different industries with quality first. Our belief is to provide our customers with more and better high value-added products. Let's create a better future together.

20-30

-

50

40-60

-

100

80-120

-

400

300-500

-

800

600-900

-

-

-

-

&#;

FAQ 

Q1. How can we guarantee the products' quality?
1.All materials must be tested refers to key specifications before unload.
2.We will store different material into different warehouse after unload.
3.We keep paper and computer storage records.
 
Q2: What will be your sample policy?
A: We offer free sample, customer afford the cost of delivery.
 
Q3: What is your payment terms?
A: T/T 30% in advance and balance before shipment.
 
Q4. What about the lead time?
A:Sample needs 3-5 days, mass production time needs 3-5 working days for lot order quantity.
 
Q5. Do you have any MOQ limit for trial order?
A: We have no MOQ, small quantity is available for us.
 
Q6. Is it OK to print my logo on the bags?
A: Yes. we can accept this clause, please inform us formally and confirm the design firstly before production.

We provide the following service to customers:
&#; Study the properties of competitor's product.
&#; Help client to find matching grade quickly and precisely.
&#; Formulation Service to improve performance and control cost, according to each client's specific weather condition, special sand and cement properties, and unique working habit.
 

We have both Chemical Lab and Application Lab to ensure each order's best satisfaction

&#; Chemical labs is to allow us to evaluate properties as viscosity, humidity, Ash, pH, content of methyl and hydroxypropyl groups, substitution degree etc.
&#; Application lab is to allow us to measure open time, water retention, adhesion strength, slip and sag resistance, setting time, workability etc.

 

Recommended GradeSL HP100WPSL HP70WPAppearance

White or off-white powder

White or off-white powderWater Retention Rate(%)

97%min.

97%min.Moisture content

&#;5 &#;

&#;5 &#;pH value

6-7

6-7Viscosity

mPa.s (NDJ-1, 2% solution, 20&#;)

mPa.s (NDJ-1, 2% solution, 20&#;)

Gypsum plaster is a popular construction material known for its excellent properties, such as fire resistance and sound insulation. To further improve its workability, adhesion, and performance, Hydroxypropyl Methyl Cellulose (HPMC) is often used as an additive. In this article, we will explore the significance of HPMC for gypsum plaster and its various advantages in the construction industry.

Note:

Proportion: 

The amount of addition needs to be determined according to specific construction requirements and environmental conditions. Excessive HPMC may change the setting time and final strength of the gypsum.

Uniform mixing: 

To ensure uniform distribution of HPMC in the gypsum slurry, it should be fully mixed using appropriate mixing equipment and techniques.

Storage conditions: 

HPMC needs to be stored in a dry and cool place to prevent moisture and agglomeration.

Environmental protection and safety: 

Although HPMC is generally safe, proper safety measures should be followed when handling any chemical additives, including wearing appropriate personal protective equipment (such as gloves, goggles, etc.) and ensuring good ventilation.

The Role Of HPMC In Gypsum Plaster:

Improved Workability: 

HPMC enhances the workability and ease of application of gypsum plaster, allowing it to spread more smoothly and efficiently on a variety of surfaces. Its water-retaining properties prevent rapid drying, allowing contractors to achieve consistent results without compromising quality.

Enhanced Adhesion: 

HPMC helps improve the adhesion of gypsum plaster to dissimilar substrates, promoting a strong bond and reducing the risk of delamination or cracking over time. This produces a long-lasting, durable plaster finish.

Superior Crack Resistance: 

HPMC-treated plaster is more resistant to cracking, reducing the likelihood of cracks forming due to shrinkage or movement. This is particularly beneficial in areas prone to temperature fluctuations or structural changes.

OPTIMAL OPEN TIME: 

HPMC extends the open time of the plaster, giving craftsmen more time to perfect their finishing touches. This increase in machinability means improved aesthetics and a more refined final appearance.

Controlled Water Retention: 

The controlled water absorption and release capabilities of HPMC ensure proper curing of the plaster, allowing for even drying and minimizing surface imperfections. This controlled hydration helps create an even, flawless finish.

Description of HPMC for gypsum plasters:

Water Retention: 

HPMC serves as a water retention agent in gypsum plasters, helping to maintain the optimal moisture level within the plaster mix. This extended water retention ensures that the plaster remains workable for a longer period, allowing for easier application and smoother finishing.

Improved Workability: 

By enhancing water retention, HPMC enhances the workability of gypsum plasters, making them easier to mix, apply, and spread onto surfaces. The improved workability results in better coverage, reduced material waste, and enhanced overall productivity during plastering operations.

Reduced Sagging and Slumping: 

The addition of HPMC helps prevent sagging and slumping of gypsum plasters, particularly on vertical surfaces such as walls and ceilings. This improved sag resistance ensures that the plaster adheres evenly to the substrate without dripping or sliding, resulting in a uniform and aesthetically pleasing finish.

Enhanced Adhesion: 

HPMC improves the adhesion of gypsum plasters to various substrates, including masonry, concrete, wood, and drywall. This enhanced adhesion ensures a strong bond between the plaster and the substrate, minimizing the risk of delamination or detachment over time.

Crack Resistance: 

HPMC contributes to the crack resistance of gypsum plasters by imparting flexibility to the hardened material. This increased flexibility allows the plaster to accommodate minor movements or substrate expansion and contraction without cracking or fracturing, ensuring long-term durability and structural integrity.

Surface Smoothness: 

Gypsum plasters formulated with HPMC exhibit improved surface smoothness and finish, resulting in a uniform and seamless appearance. The addition of HPMC helps minimize surface imperfections such as ridges, bumps, and air voids, allowing for easier painting or decoration after plastering.

Compatibility: 

HPMC is compatible with other additives commonly used in gypsum plaster formulations, including setting accelerators, retarders, and air-entraining agents. This compatibility allows formulators to tailor the properties of gypsum plasters to meet specific performance requirements while maintaining consistency and stability.

In summary, Hydroxypropyl methylcellulose (HPMC) plays a crucial role in enhancing the performance and workability of gypsum plasters, providing improved water retention, workability, sag resistance, adhesion, crack resistance, surface smoothness, and compatibility with other additives. Its use contributes to the production of high-quality gypsum plaster formulations suitable for a wide range of interior and exterior plastering applications.

Please contact Sleo to solve your customization needs and provide you with high-quality products. Welcome your consultation!

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