Starch ether is the polysaccharide compound extracted from natural plants, with the same chemical structure and similar properties compared with cellulose ethers.
Starch ethers basic properties are as follows:
Solubility: dissolve in cold water
Particle size: ≥98% (80 mesh sieve]
Color: white or light yellow
Used in building mortar, starch ether can significantly increase the consistency of mortar and improve the construction performance and sag resistance of mortar.
Starch ether is usually used in conjunction with non-modified and modified cellulose ethers.
Starch ether is suitable for both neutral and alkaline systems, and compatible with most of the additives in gypsum and cement products, such as surfactants, HPMC, starch and polyvinyl acetate and other water-soluble polymers.
Starch ether is mainly used for hand or machine spraying mortar, tile adhesive mortar, caulking materials and adhesives, and masonry mortar with cement and gypsum as the cementitious materials.
Starch Ether cement- and gypsum-based products with distinctive qualities.
Similar to Hydroxypropyl Methylcellulose(HPMC) in the chemical structure, it can not only provide functions similar to cellulose, but also have very good compatibility with other additives in building.
Starch Ether has a very small amount used in mortar products, and a very low addition amount enables to achieve very good quality effects.
starch ether has many significant properties, including thickening in solution, good solubility in water and stability in suspensions or glue solutions, protecting colloids, film-forming behavior, water retention, bonding property, non-toxic, odorless, biocompatibility and thixotropy.
In addition, starch ether also has a great variety of distinctive properties, like surface activity, foam stability and ionic activity. Due to these properties, starch ether is widely used in building materials, detergents, textile, papermaking, food, cosmetics, coatings and many other industries.
Very good rapid thickening ability, with certain water-retaining behavior;
Low in the amount used, with an extremely low addition amount to achieve very high effects;
Increase the slide resistance of materials;
Improve the operating performance of material, easy to operate;
Extend the opening hours of material.
II Addition Amount of Hydroxypropyl Methylcellulose(HPMC) for Applications in the Following Materials
All varieties ( cement-, gypsum- based) of interior and exterior wall putty powder;
All varieties (tile, stone) of binders;
All varieties of facing mortar and plastering mortar, especially for external wall thermal insulation mortar.
The recommended amount of HPS added is 0.05%—0.15%.
Based on the original formula, reduce the amount of Hydroxypropyl Methylcellulose(HPMC) by about 0.1%-0.2%.
That is, 20%-30% of Hydroxypropyl Methylcellulose(HPMC) in the original formula is replaced by starch ether, which enables the workability increased, and meanwhile the production cost decreased by 10-20%.
Hydroxypropyl Methylcellulose(HPMC) can be used as an admixture of cement- and gypsum-based products, having good compatibility with other admixtures in building.
Its use in conjunction with Hydroxypropyl Methylcellulose(HPMC) enables to reduce the amount of Hydroxypropyl Methylcellulose(HPMC) (usually an amount of 0.05% starch ether 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. Adding starch ether helps significantly reduce the amount of Hydroxypropyl Methylcellulose(HPMC).
Starch ethers enhance workability and improve the application properties of dry-mixed building products.
They are recommended to fine-tune the anti-sagging properties, workability and consistency of dry mortars such as tile cements, plasters and renders and to increase the yield and water demand of these systems.
Starch Ether can impart unique properties to cement and gypsum based products.
Starch ether has the similar chemical structure with Hydroxypropyl Methylcellulose(HPMC) that not only provide Hydroxypropyl Methylcellulose(HPMC)-like function, but also has good compatibility with other building additives.
In combination with Hydroxypropyl Methylcellulose(HPMC), Starch Ether can play a better thickening effect, with better crack resistance and improve workability.
And by adding starch ether, the cost of the mortar formulation can be significantly reduced.
The properties of starch ether in dry mortar are as follows:
Due to the special chemical structure of starch ether, Starch Ether can effectively prevent the hanging phenomenon of thick layer of mortar, which has a good improvement effect on the sliding of the tile, the hanging of thick layer and other undesirable phenomenon;
Adding appropriate amount of Starch Ether in the mortar can delay the opening time of it.
The water retention of starch ether can be kept stable with the increase of temperature.
Therefore, the product can not only improve the water retention performance of the mortar, but also compensate the rapid retention of the water retention capacity of the ordinary water retention agent with the increase of the temperature;
Starch Ether has a fast thickening function for mortar, which can improve the rheology of spray mortar and plaster mortar;
Starch Ether can effectively prevent the stratification/segregation of the mortar, which can be well used in self-leveling mortar;
Starch Ethers are added in the following materials:
Inner and outer wall putty powder of various types(cement, gypsum base);
Various types of(tile, stone) binders;
All kinds of facing mortar and plaster mortar, especially the exterior wall insulation mortar.
Starch ethers are added to mortars in order to modify the rheology of the fresh mortar by bridging flocculation.
The proper function as a flocculant for cement requires that the starch ether molecules possess anionic charged functional groups.
With this in mind, the different types of commercially available starch ethers are evaluated.
Two types of starch ethers can be distinguished, which differ in the dependence of the effect on dosage.
The interactions of starch ethers with calcium ions are discussed and recommendations are given for the targeted selection of the appropriate product.
Starch Ether Powder Mainly Used in Dry Mix Building Mortar. Starch Ether can significantly increase the consistency of mortar and improve the construction performance and sag resistance of mortar.
Starch ether is usually used in conjunction with Non-Modified and Modified Cellulose Ethers.
Starch ether is suitable for both Neutral and Alkaline Systems and compatible with most of the Additives in Gypsum and Cement Products, Such as Surfactants, HPMC, Starch and Polyvinyl Acetate and other water-soluble polymers.
Starch Ether Powder MainlyUsed in Dry Mix Building Mortar.
Starch Ether can significantly increase theconsistency of mortar and improve the construction performance and sagresistance of mortar.
Starch ether is usually used in conjunction withNon-Modified and Modified Cellulose Ethers.
Starch ether is suitable for both Neutral and Alkaline Systems and compatible with most of the Additives in Gypsum and Cement Products, Such as Surfactants, HPMC, Starch and Polyvinyl Acetate and otherwater-soluble polymers.
Hydroxypropyl starch ether is a chemically modified special starch that is mainly used in the construction industry as a thickener, binder, water-retaining additive for mineral-based systems: cement or gypsum. When used together with unmodified cellulose ethers, it has the following characteristics:
• Easy handling and solution stability;
• Resistance to slipping;
• Good manufacturability and consistency of the composition;
• Low stickiness of the solution during application.
Starch Ether is a chemical compound used for several applications such as papermaking, building materials, cosmetics, and others.
Starch Ether is extensively used in numerous industries owing to properties such as high stability and biocompatibility.
Starch ethers for the construction industry
As a vital link between raw material suppliers and construction industries, the Emsland Group provides a variety of innovative starch ethers based on renewable raw materials.
The Emsland Group has state-of-the-art modification systems and the most advanced production facilities to produce customized starch ethers for the construction industry.
Starch ethers have many uses and can vary dramatically depending on the application.
Due to the increasing raw material and energy costs, it is essential to continuously improve the quality of the products. Starch ethers improve the opening times and the product, among other things, for the end-users.
Our products contain rheological properties to prevent sagging and a thin spread of mortar.
Starch ether, which is produced by a series of chemical and physical reactions with starch as raw material.
Starch ether is a kind of non-toxic, tastelesswhite or beige power, which can be dissolved in cold water to form transparent or translucent viscous liquid.
Starch Ether is effective in thickening, adhesion, dispersion, emulsification, suspension, adsorption, surface activity, water retention and so on.
Starch Ether is a white (colorless) powder with good fluidity.
Starch ether has good water solubility, when in an aqueous solution is transparent and colorless with good stability.
This product finds application in a variety of industries including adhesives, coating or organic liquids for building materials.
Hydroxypropyl Starch Ether (HPS) is a chemical compound that exhibits the physical appearance of white (colorless) powder with a high degree of fluidity.
Starch Ether is soluble in water and when mixed with an aqueous solution it exhibits a colorless or transparent appearance and also shows good stability.
starch ether also aids in numerous important properties such as solution thickening, water retention, biocompatibility, surface activity, foam stability to name a few.
Because of these attributes, hydroxypropyl starch ether can be widely used and perform as a material of choice in different applications such as synthetic detergent, building materials, textile, papermaking, mining, food, cosmetics, organic liquid or paint, petroleum, aerospace, adhesives, and polymerization. In the commercial marketplace, different grades of material are available of which food and pharma grades are extensively used.
Amongst other applications, the use of hydroxypropyl starch ether is gaining traction and momentum in the construction industry, hydroxypropyl starch ether can be used with the products such as cement, lime calcium base, gypsum in inner& outer wall putty powder, with plastering and decorative mortar.
The addition of starch ether with architectural admixtures promotes the internal structure with a better thickening effect and also provides resistance to crack formation and improves workability.
In the paper Industry, hydroxypropyl starch ether can be used as an additive that can promote chemical fiber hydration.
Also in the textile industry hydroxypropyl starch ether can be used as a sizing agent which provides effective and efficient textile sizing.
Furthermore, hydroxypropyl starch ether finds exceptional usage in the food and pharmaceutical industry.
On the basis of Grade
On the basis of Application
Starch Ether is a white fine powder obtained from natural plant as raw material after modification, high etherification reaction and spray drying. Starch Ether does not contain plasticizer.
Starch Ether is a kind of etherified starch, which is formed by etherification of propylene oxide and starch, replacing the hydroxyl group in the polymer structure of starch.
White (colorless) powder, good fluidity, good water solubility, transparent colorless water solution, good stability.
Starch Ether is stable to acid and alkali, and its scorching temperature is lower than that of the original starch, and its cold and hot viscosity changes are more stable than that of the original starch.
Mixing with salt and sucrose had no effect on viscosity.
After etherification, the stability and transparency of ice melting are improved. Chemical properties: the properties of starch derivatives with hydroxypropyl substituents.
There are three replaceable hydroxypropyl groups in the glucose unit of starch, so products with different degrees of displacement can be obtained.
Hydroxypropyl starch is used for building materials.
With the development of construction and building materials industry in China, especially the development of energy-saving and heat preservation of buildings, the external insulation of external walls has become a national compulsory standard.
The dry mixed mortar products for heat preservation cannot be separated from cellulose ether.
Starch Ether, as the performance improver of cellulose ether products, has good thickening effect and good water retention of medium viscosity It has the advantages of less addition, better construction performance, smoother operation and longer opening time of materials.
Starch Ether can also be used as binder, suspending agent and thickener in papermaking, textile, petroleum drilling, daily chemical industry and other industries.