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Ethylsilicate 28

Name
Ethylsilicate 28
Product description

Ethyl silicate-28 is a mixture of tetraethoxysilane and polyethoxysiloxanes with a content of a mass fraction of silicon dioxide (SiO2) in the range of 28.8 - 29.5%.

It is well soluble in toluene, benzene, ethyl alcohol and other solvents.

Ethylsilicate-28 is obtained from the reaction of silicon tetrachloride and ethyl alcohol.

Synonyms: Ethylsilicate 28, TEOS, ethyl silicate, Tetraethyl orthosilicate, tetraethyl silicate, Orthosilicic acid tetraethyl ester, Tetraethoxysilane, silicic acid (H4SIO4), tetraethyl ester, tetraethyl silicate

CAS. No: 78-10-4   EINECS 201-083-8   EC 201-083-8

Our products

Polymer modifier and crosslinking agent. Investment casting binder for ceramic foundry molds. Additive in paints and varnishes. Water-repellent impregnation.
Fields of application

Manufacture of paint and varnish coatings:

  • Varnishes and paints with good adhesion to glass.
  • Component for the nonstick paints preparation.
  • As a binder component in heat-resistant, chemically and weather-resistant coatings and in other areas where, after hydrolysis in an alkaline medium, drying or firing, it is required to obtain a strong, solid material that is insoluble in water, resistant to high temperatures and not corrosive.
  • Ethyl silicate-28 is used as a modifying additive in enamel (additive in paints). It forms fast-drying, heat-resistant and waterproof films with a low degree of shrinkage and stable gloss.
  • As a modifying additive to parquet lacquers and varnishes, it reduces the time of preparation and drying, while reducing the consumption of natural oil, improving the quality of the film.
  • Ethyl silicate-28 additive to urea-formaldehyde varnishes reduces the consumption of varnish, increases the varnish viability in a mixture with a hardener about 10 times.
  • It is used to quickly increase the hardness of rosin varnish on highly polymerized oil, glass varnish, alkyd resin solutions.

Polymer additive:

  • For the manufacturing of films, packaging - provides transparency, creates a "gas barrier" in food packaging (i.e., products in the packaging, produced using Ethylsilicate-28 additive retain their freshness longer and the shelf life increases).
  • A crosslinking agent for silicone rubbers.

Chemical industry:

  • Ethylsilicate-28 is a source of the finest amorphous silica (pure reactive silica) and TEOS of high purity.
  • Reagent for organic synthesis.
  • Dehydrating agent.

Metallurgy / Engineering:

  • Ethyl silicate-28 is used as a source material for obtaining a binder in the foundry industry for the ceramic casting molds manufacturing (investment casting technology, casting in ceramic molds).
  • A binder for the manufacture of rods exposed to high temperatures.
  • Superhard alloys parts, that are difficult to stamp, roll and forge, are made using Ethyl silicate additive.

Building sector:

  • As glue, for impregnation of porous materials.
  • Ingredient for the hydrophobic agents manufacturing.
  • Weather-resistant hydrophobic building materials production.
  • Wood impregnating to make it bacteria resistant.
  • Protective and preservation treatment of painted surfaces.
  • Modifying additive for plaster, putty and whitewash solutions.
  • Modifier of epoxy and bituminous materials.
  • Used to increase water resistance, frost resistance, corrosion resistance of gypsum, concrete, silicate paints.
  • Increases the rigidity and strength of wall panels, brick, plaster and stone architectural details.
  • Impregnation of concrete to reduce the porosity.
  • Protects aluminum building structures against corrosion.
  • Prevents the appearance of dark and rusty stains, peeling, efflorescence on surfaces.
  • Acid-resistant cement manufacturing.

Ceramic products manufacturing:

  • Binder in the manufacturing of ceramic masses that are resistant to highly corrosive environments and have mechanical strength, heat resistance and high dielectric properties.
  • Additive in grinding of silicate materials in the production of porcelain, faience, earthenware and majolica mass.
  • Increases strength, water resistance and heat resistance of ceramic masses.
  • Increases a grade of finished products.

Textile industry:

  • Ethyl silicate-28 as an additive-modifier provides strength increasing of cotton yarn, non-shrinking finishing and imparts dirt-repellent properties to wool fabrics.
  • Reduces shrinkage of rugs and make them resistant to dust and decay.
  • Dehydrated leather tanning compositions component.
  • As the impregnation of filter fabrics.
  • Component of protective impregnation for work wear.

Glass manufacturing:

  • Modifying additive Ethylsilicate-28 imparts the glass hydrophobic effects, mechanical and chemical resistance, light scattering.
  • Improves the appearance, protects the glass surface from corrosion.
  • Ingredient for glass, mirrors, crystal cleaning agents.
  • The treated surface acquires a steady shine, dirt is easily removed from it, visibility is improved.

Oil and gas production - for waterproofing works on oil and gas wells.

In medicine - as a binder in the manufacture of dental prostheses.

In the optical industry for the production of optical fiber materials, the enlightenment of optical glasses.

Jewelery: Component of self-curing compositions when casts of.

Benefits
  • easily hydrolyzed by air moisture;
  • dries quickly and speeds up the drying time of processed materials;
  • creates a durable silicone film;
  • soluble in organic solvents;
  • possesses the good binding and fastening properties;
  • Ethyl silicate-28 withstands contact with molten metal;
  • parts obtained in forms coated with a film of ethyl silicate, do not require subsequent mechanical treatment;
  • increases the water resistance of paint or lacqer film;
  • improves the quality and durability of epoxy and bitumen materials.
Storage

Store in original tightly closed container at temperatures from -40°C up to +30°C. Store in a cool, dry, well-ventilated place. Protect from moisture and direct sunlight. Store away from heaters, oxidizers, strong acids, alkalis and other chemicals having alkaline reaction for example, ammonia, amines.

The guaranteed shelf life in original container is 12 months.

Storage over the date specified on the label does not necessarily mean the product is unusable. In case if store more please check the properties of product before use.

Packaging

Metal drums with a capacity of 16 kg.
Metal drums with a capacity of 180 kg.

Safety information

Ethyl silicate-28 is a low toxic, explosive, fire hazardous product. When carrying out work observe fire safety techniques.

Detailed instructions are given in the relevant product safety data sheet. It can be provided upon request.

Parameter name and measure unit Standard
Appearance Colorless clear liquid with a specific odor
Color by Gardner scale, max 1
Chemical formula Si(OC2H5)4
Molecular mass 208,3
Mass fraction of silicon dioxide,% 28,8 – 29,5
Mass fraction of tetraethoxysilane,% 99,9
Mass fraction of ethyl alcohol,%, max. 0,1
Density, at +25℃, g/cm3 0,930 – 0,934
Viscosity, at +25℃, MPa*s 0,70 – 0,72
Acidity, %, max 0,001
Boiling point, ℃ 165
Flash point (closed cup), ℃ 49,1
Refractive index at +20°C 1,383
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