Description
Product Description
HENGDA-Si40
HENGDA-Si40 is a ethyl silicate with a silicon dioxide content of approximately 38- 42 % upon complete hydrolysis (the Si content of HENGDA-Si40 is calculated as SiO2).
HENGDA-Si40 is formed in the presence of water from tetraethyl silicate (Si[OEt]4) by partial hydrolysis of the ethoxy groups to hydroxyl groups and subsequent condensation with formation of siloxane bonds (-Si-O-Si-).
HENGDA-Si40 is a colorless, low-viscosity liquid with an SiO2 content of 40% (the Si content of HENGDA-Si40 is calculated as SiO2). The polysilicic acids still have a sufficient content of ethoxy groups which can be activated by acid- or base-catalyzed hydrolysis. Condensation starts even during hydrolysis, with the formation of relatively large polymeric molecules. During storage of these hydrolysates, condensation continues until a gel is formed, where the rate depends on the degree of hydrolysis.
The action of the hydrolysates as binders is based on the continuation of the hydrolysis with subsequent gelation and dehydration to give polymeric SiO2 structures.
Similarly toHENGDA-Si28, HENGDA-Si40 is used to deposit silicic acid formed as a result of complete hydrolysis. The resulting silicic acid bonds well to many inorganic substrates, such as glass, ceramic, metal, fillers, pigments and synthetic fibers. The deposition of a thin SiO2 layer improves the chemical and thermal stability and mechanical properties.
HENGDA-Si40 is a ethyl silicate with a silicon dioxide content of approximately 38- 42 % upon complete hydrolysis (the Si content of HENGDA-Si40 is calculated as SiO2).
HENGDA-Si40 is formed in the presence of water from tetraethyl silicate (Si[OEt]4) by partial hydrolysis of the ethoxy groups to hydroxyl groups and subsequent condensation with formation of siloxane bonds (-Si-O-Si-).
HENGDA-Si40 is a colorless, low-viscosity liquid with an SiO2 content of 40% (the Si content of HENGDA-Si40 is calculated as SiO2). The polysilicic acids still have a sufficient content of ethoxy groups which can be activated by acid- or base-catalyzed hydrolysis. Condensation starts even during hydrolysis, with the formation of relatively large polymeric molecules. During storage of these hydrolysates, condensation continues until a gel is formed, where the rate depends on the degree of hydrolysis.
The action of the hydrolysates as binders is based on the continuation of the hydrolysis with subsequent gelation and dehydration to give polymeric SiO2 structures.
Similarly toHENGDA-Si28, HENGDA-Si40 is used to deposit silicic acid formed as a result of complete hydrolysis. The resulting silicic acid bonds well to many inorganic substrates, such as glass, ceramic, metal, fillers, pigments and synthetic fibers. The deposition of a thin SiO2 layer improves the chemical and thermal stability and mechanical properties.
HENGDA-Si40 is a ethyl silicate with a silicon dioxide content of approximately 38- 42 % upon complete hydrolysis (the Si content of HENGDA-Si40 is calculated as SiO2).
HENGDA-Si40 is formed in the presence of water from tetraethyl silicate (Si[OEt]4) by partial hydrolysis of the ethoxy groups to hydroxyl groups and subsequent condensation with formation of siloxane bonds (-Si-O-Si-).
HENGDA-Si40 is a colorless, low-viscosity liquid with an SiO2 content of 40% (the Si content of HENGDA-Si40 is calculated as SiO2). The polysilicic acids still have a sufficient content of ethoxy groups which can be activated by acid- or base-catalyzed hydrolysis. Condensation starts even during hydrolysis, with the formation of relatively large polymeric molecules. During storage of these hydrolysates, condensation continues until a gel is formed, where the rate depends on the degree of hydrolysis.
The action of the hydrolysates as binders is based on the continuation of the hydrolysis with subsequent gelation and dehydration to give polymeric SiO2 structures.
Similarly toHENGDA-Si28, HENGDA-Si40 is used to deposit silicic acid formed as a result of complete hydrolysis. The resulting silicic acid bonds well to many inorganic substrates, such as glass, ceramic, metal, fillers, pigments and synthetic fibers. The deposition of a thin SiO2 layer improves the chemical and thermal stability and mechanical properties.
PROPERTY| Appearance | Colorless Transparent Liquid |
| SiO2 content (wt%) | 38.0~42.0 |
| Density(ρ20),g/cm3 | 1.040~1.070 |
Equivalent NameTEOS-40,DYNASIL40TES 40Applications:1. Adhesion promoter for paint coatings, investment casting materials, and ceramic materials; crosslinking agent for silicone rubber.
2. Ethyl silicate can be used as insulating materials, coatings for the electronics industry, zinc powder coating binders, optical glass treatment agents, and coagulants. Organic silicon solvents and precision casting binders for the electronics industry, and to manufacture models for metal investment casting methods box.
3. After the ethyl silicate is completely hydrolyzed, extremely fine silicon oxide powder is produced, which is used to make phosphors.
4. It is used for organic synthesis, preparation of soluble silicon, catalyst, etc.
5. It is also used as a crosslinking agent and intermediate in the production of polysilicon.ReactivityHENGDA-Si40 can react with water.Company Profile
Hengda Chemical, headquartered in Gaizhou, Liaoning province, we are the first manufacturer of silane coupling agents in China since 1965.
HENGDA products cover 12 series of silane coupling agents and crosslinking agents including amino silane, methacrylate silane, epoxy silane, vinyl silane, mercapto silane, alkyl silane, ethyl silicate, chlorine silane, isocyanate silane, phenyl silane, ureido silane, and sulfur silane.
HENGDA silane coupling agents are widely used in fiberglass, adhesives &sealants, resin, coatings, wire & cable, solar PV, textile auxiliaries, pigment filler, silicone fluid, precision casting, building protection, plastics and composites, rubber & tires, foundry, aerogels, and artificial stone.
HENGDA production lines are equipped with DCS remote-control operating system, safety instrument system and environmental protection treatment facilities.
Relying on advanced production equipment, complete testing methods and quality management system (ISO 9001), HENGDA Chemical provides customers with stable high-quality products and services. We have become customers' reliable long-term suppliers in over 57 countries and regions. Packaging & Shipping
25 kg,200 kg drums and 1000kg IBC
Our Advantages
1. The First Manufacturer of silane coupling agents in China since 1965. We have the most production experience in silane coupling agents.
2. Professional in Producing High-Quality Silane Coupling Agents.
3. Safety facilities such as DCS automatic remote control operating system, SIS safety instrumentation system; environmental treatment facilities such as waste gas collection and treatment system, sewage treatment system.
4. Well-trusted by world customers covering over 57 countries and regions.
Complaint
