Hydroxypropyl Methylcellulose (HPMC) is a widely used additive in various industries, including construction. In gypsum plaster, HPMC serves multiple functions, ranging from improving workability to enhancing the performance of the final product.
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Overview of Gypsum Plaster:
Gypsum plaster, also known as plaster of Paris, is a widely utilized building material due to its ease of application, versatility, and fire-resistant properties.
It is commonly used for interior wall and ceiling finishes, creating smooth surfaces suitable for painting or wallpapering.
Introduction to Hydroxypropyl Methylcellulose (HPMC):
HPMC is a cellulose ether derived from natural cellulose, primarily wood pulp or cotton.
It is chemically modified to enhance its properties, including water retention, thickening ability, and adhesion.
HPMC is available in various grades, each tailored to specific applications based on viscosity, particle size, and other parameters.
Properties of HPMC Relevant to Gypsum Plaster:
a. Water Retention: HPMC improves the water retention capacity of gypsum plaster, prolonging the hydration process and enhancing workability.
b. Thickening: HPMC acts as a thickener, preventing sedimentation and improving the consistency of the plaster mix.
c. Adhesion: HPMC enhances the adhesion of gypsum plaster to various substrates, ensuring better bonding and reducing the risk of delamination.
d. Air Entrainment: HPMC facilitates air entrainment, leading to improved workability and reduced cracking in the plaster.
Applications of HPMC in Gypsum Plaster:
a. Basecoat and Finish Coat Formulations: HPMC is incorporated into both basecoat and finish coat formulations to improve rheological properties and workability.
b. Crack Filling Compounds: In crack filling compounds, HPMC helps maintain consistency and adhesion, ensuring effective repair of surface imperfections.
c. Skim Coat and Leveling Compounds: HPMC contributes to the smoothness and durability of skim coats and leveling compounds, enhancing surface finish.
d. Decorative Plasters: In decorative plasters, HPMC assists in achieving intricate textures and designs while maintaining structural integrity.
Benefits of Using HPMC in Gypsum Plaster:
a. Improved Workability: HPMC enhances the workability of gypsum plaster, allowing for easier application and reduced labor requirements.
b. Enhanced Durability: The addition of HPMC improves the strength and durability of gypsum plaster, reducing the likelihood of cracking and shrinkage.
c. Consistent Performance: HPMC ensures consistent performance of gypsum plaster across different environmental conditions, such as temperature and humidity variations.
d. Versatility: HPMC enables the formulation of gypsum plaster with a wide range of properties, catering to diverse application requirements.
e. Environmental Friendliness: HPMC is biodegradable and environmentally friendly, aligning with sustainable construction practices.
Challenges and Considerations:
a. Compatibility: Proper selection of HPMC grade and dosage is crucial to ensure compatibility with gypsum plaster and other additives.
b. Quality Control: Stringent quality control measures are essential to maintain batch-to-batch consistency and performance reliability.
c. Storage and Handling: HPMC should be stored in dry conditions and handled with care to prevent contamination or degradation.
Hydroxypropyl Methylcellulose (HPMC) plays a vital role in enhancing the properties and performance of gypsum plaster. Its ability to improve workability, adhesion, and durability makes it indispensable in various applications within the construction industry. Understanding the properties and proper application of HPMC is essential for optimizing the performance of gypsum plaster and ensuring the success of construction projects.
Post time: Mar-27-HPMC Description
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.
CAS NO.: -65-3
Other Names: Hypromellose
EINECS No.: 220-971-6
Purity: 99.9%min
Place of Origin: Hebei, China
Brand Name: HONGHAI
Packing: 25Kg/bag
Certification: ISO
Application: Construction additives
HS Code:
Grade: Industrial grade
Supply Ability: MTS/Month
Product Name
HPMC (Hydroxypropyl Methyl Cellulose)
Content of Methoxy
18%-32%
Content of Hydroxypropyl
8%-16%
Temperature of Gelation
54&#;-75&#;
Water
For more information, please visit HPMC for gypsum.
&#;5%
Ash
&#;2%
PH Value
7-8
Appearance
White Powder
Fineness
80-100 Mesh
Viscosity
200 to 200,000 it can be customized according customer needs.
Surface treatment
Cold water instant type:surface treated
Non-instant type:without surface treatment
HPMC characteristics
HPMC Applications
HPMC(Hydroxypropyl Methyl Cellulose) 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.
HPMC For Wall putty
Water retention: maximized water content in slurry.
Anti-sagging: when spreading a thicker coat corrugation can be avoided.
Increased mortar yield: depending on the weight of the dry mixture and appropriate formulation ,HPMC can increase the mortar volume.
HPMC For Exterior Insulation and Finish System ( EIFS )/ETICS
Improved adhesion.
Good wetting ability for EPS board and substrate.
Reduced air entrancement and water uptake.
HPMC For Self-leveling
Protection from water exudation and material sedimentation.
No effect on slurry fluidity with low viscosity
HPMC, while its water retention characteristics improve the finish performance on the surface.
HPMC For Crack Filler
Better workability: proper thickness and plasticity.
Water retention ensures prolonged work time.
Sag resistance: improved mortar bonding ability.
HPMC For Tile Adhesives
Better workability: lubricity and plasticity of plaster is ensured, mortar can be applied easier and quicker.
Good water retention: prolonged opening time will make tiling more efficient.
Improved adhesion and sliding resistance: especially for heavy tiles.
HPMC For Dry mix mortar
Easy dry mix formula due to cold water solubility: lump formation can be easily avoided, ideal for heavy tiles.
Good water retention: prevention of fluid loss to the substrates, the appropriate water content is kept in mixture which guarantees longer concreting time.
HPMC For Cement Plaster
Increased water demand: increased open time, expanded spry area and more economical formulation.
Easier spreading and improved sagging resistance due to improved consistency.
FAQ
Q: Are you trading company or manufacturer ?
A: We are factory.
Q: Do you provide samples ? Is it free or extra?
A: Yes, we could offer 200 g free sample for each grade.
More than 1kg, we provide free samples, but the freight will be afford by clients.
Q: How can I get the samples?
A: Send sample request by or , we'll dispatch samples by DHL or TNT.
Q: How long is your delivery time?
A: Generally it is 3-5 days if the goods are in stock.
For big orders 50-200 tons, we could delivery within 20 days.
Q: What is your terms of payment ?
A: Payment &#;USD, 100% in advance.
Payment>USD, T/T(30% in advance and balance against B/L copy)or L/C at sight.
Q: How about OEM branding and packing?
A: Blank bag, Neutral bag available, OEM bag also available.
Q: How to ensure stable quality
A: (1) All production process is automatic controlled by DSC system, no manual operation, so the quality of different batches are consitent.
(2) We test the sample before sending to you, and delivery goods at same quality for normal orders.
(3) Our QC and Lab will test all the raw materials purchased, test all finished products before delivering.
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