What is construction grade HPS (Hydroxypropyl Starch ...

HPS - Hydroxypropyl Starch Ether

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HPS is a kind of ionic hydroxypropyl starch ether, which is produced by a series of chemical and physical reactions with starch as raw material. It is a kind of non-toxic, tasteless white or beige power, which can be dissolved in cold water to form transparent or translucent viscous liquid. It is effective in thickening, adhesion, dispersion, emulsification, suspension, adsorption, surface activity, water retention and so on.  

ETON Hydroxypropyl starch ether is a kind of chemical modified starch mainly used as thickener and texturing agent for cement or gypsum based mortar products. Hydroxypropyl starch ether is used for construction.

ETON HPS is a cost-saving material and is easy to obtain the required thickening. In wet mortars, it offers non-sag, anti-slip properties, good work-ability and low stickiness.

Key properties

1. Rapid thickening ability is available.

2. It is with medium viscosity and high water retention.

3. With a small amount, a little increase can achieve high effect.

4. It can be used together with methyl cellulose ( MC ) and ( HPMC ) to reduce the amount of cellulose ether

5. It can improve the sagging resistance ability to prevent the (sliding) flowing of materials when coated or pasted.

6. Lubrication can improve the operating skills of the material to ensure more smooth operation.

Applications

Our HPS product has been applied in a variety of building materials, such as tile adhesives, cement/gypsum mortar, and various putty powders (e.g., cement-based, gypsum-based and gray calcium-based putty powder).

You will get efficient and thoughtful service from Ding’ao.

Our HPS product is an excellent thickener and water retention agent. With a small dosage, it can effectively increase the slip resistance, improve the workability, and extend the open time of the material.

Shandong ETON New Material Co.,Ltd

Differences between HPS and HPMC

 

HPS (short for hydroxypropyl starch ether) is unfamiliar to many people, and thought to be a little different from common starch, but that’s not the case. HPS has a very small amount used in mortar products, and a very low addition amount enables to achieve very good quality effects.

HPS is a white fine powder free from plasticizers, prepared from natural plants, which are modified, highly etherified, and spray dried. It is totally different from common or modified starch.

 

Hydroxypropyl methyl cellulose (HPMC for short), also known as hypromellose or hydroxypropyl methyl cellulose ether, is prepared from selection of highly pure cotton cellulose, treated in 35-40℃ alkali liquor for 0.5h, squeezed to smash cellulose, and properly aged at 35℃ to make average polymerization degree of alkali fiberobtained within the required range. Put alkali fiber into the reaction kettle, then add propylene oxide and methyl chloride in order for 5h etherification at 50-80℃, with the maximum pressure of 1.8MP. Afterwards, add an appropriate amount of hydrochloric acid and oxalic acid into 90℃ hot water for washing the materials and expanding the volume. Then use the centrifugal machine for dehydration and finally become neutral with repeated washings. It is widely used in building, chemical, coatings, pharmaceutical and military industries, respectively as a film former, binder, dispersant, stabilizer and thickener.

 

HPMC can be used as an admixture of cement-based, gypsum-based and ash-calcium products, having good compatibility with other admixtures in building. Its use in conjunction with HPMC enables to reduce the amount of HPMC (usually an amount of 0.05% HPS added can reduce by about 20%-30% of HPMC’s amount), play thickening roles, promote the inner structure, possess better crack resistance and improve workability.

What is construction grade HPS (Hydroxypropyl Starch ...

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