What is HPMC for gypsum plaster?

The construction industry has experienced massive growth in incorporating new materials to enhance the output and overall performance of construction products. Among such trendy innovations is the gypsum plaster.

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However, one of the ingredients that serve as the gypsum plaster&#;s bedrock, particularly in stability and thickening property, is cellulose.

In this article, we&#;ll briefly examine the roles of Hydroxypropyl Methyl Cellulose in the production of gypsum plaster.

Before we dive in, let&#;s quickly integrate you with gypsum plaster and the characteristics of HPMC. 

What is Gypsum Plasters?

Widely known as hydrous calcium sulfate among chemists, gypsum itself is a water-soluble naturally occurring mineral. It exists freely in nature as crystals and can be located among layers of limestone and shale.

On the other hand, gypsum plaster is produced by heating gypsum at a very minimal temperature to achieve evaporation. The dehydrated gypsum known as Plaster of Paris (POP) is pulverized and heated at about 150&#;. The dry POP powder hardens when you add water to form gypsum plaster. The concentration can be applied over concrete, brick, or block to further strengthen it. 

Characteristics of Cellulose&#;HPMC&#;

HPMC cellulose exists as white, non-ionic cellulose ether. In its powdery form, it&#;s odorless and tasteless. It&#;s soluble in water and other organic content such as ethanol, propanol, and dichloroethane. However, it is insoluble in acetone, diethyl ether, and anhydrous alcohol.

When in an aqueous solution, HPMC offers high stability, transparency, and surface activity. Heating makes the Hydroxypropyl Methyl Cellulose precipitate for gels due to its thermal gelation properties.

How does cellulose work in gypsum products? 

1. High water retention

Cellulose has a high water-holding capacity. This attribute makes it useful to improve resistance, prevent cracking, and enhance gypsum plaster&#;s overall appearance. It also boosts surface uniformity, lubrication, and adhesion when applied to gypsum plaster in putty and other construction works.

2. Thickening property

HPMC is the right material for you if you want to increase the tensile strength of gypsum plaster and other construction material. It acts as an interface agent. That is, it improves gypsum plaster flexural strength and increases bonding strength.

3. Highly stable

HPMC's outstanding film-forming properties and high resistance to degrading enzymes help stabilize gypsum plaster pH and enhance its salt discharge performance.

Others include dispersibility, constructability, and adhesive strength. Also, HPMC has effects on the setting time, pumpability, and workability of gypsum plaster composition. Overall, it enhances construction efficiency and guides against weathering after exposure of building surfaces to water-soluble salts.

All these make HPMC an integral part of the gypsum plaster every construction worker must-have.

To order your cellulose, Michem Chemicals is your one-stop shop for quality HPMC and other construction products.with us today to book a free session with our experts for your construction material needs.

Contact with us and Get your free samples now!

Shandong Michem Chemical Co.,Ltd.

Office: No.19,Lishan North Road,Jinan Shandong,China

: -531-  Fax: -531-

Mobile/WeChat/: +86&#;0&#;

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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

&#;5%

Ash

&#;2%

PH Value

SLEO Chemical 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.

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.  

If you want to learn more, please visit our website Hydroxypropyl Methylcellulose (HPMC) For Gypsum Plasters.