Quick Search
DESCRIPTION
Sodium Methyl Siliconate is a chemical compound that is part of the group of organosilicon compounds.
Sodium Methyl Siliconate is typically used as a water-repellent agent or as a component in the formulation of coatings, sealants, and waterproofing treatments.
Sodium Methyl Siliconate consists of a silicon atom bonded to both methyl groups and oxygen atoms, with a sodium counterion attached to the oxygen.
CAS NUMBER : 63148-57-2
SYNONYMS
Sodium methylsiliconate,Silanetriol, methyl-, sodium salt,16589-43-8,EINECS 240-648-3,Silanetriol, 1-methyl-, sodium salt (1:?),
NS00131601
OVERVIEW OF SODIUM METHYL SILICONATE (SMS)
Sodium methyl siliconate (SMS) is an organosilicon compound that belongs to a broader family of silicate compounds, with the basic structural unit containing silicon-oxygen (Si-O) bonds. In SMS, a methyl group (CH₃) is attached to the silicon atom, forming a methylated silicon compound.
This gives SMS unique properties such as high hydrophobicity, stability under various environmental conditions, and solubility in water due to the presence of the sodium ion.
Sodium Methyl Siliconate is primarily used in industries like coatings, adhesives, agriculture, and electronics.
GENERAL PROPERTIES OF SILICATES AND ORGANOSILICON COMPOUNDS
Silicates are compounds consisting of silicon-oxygen networks, typically with varying degrees of polymerization.
Organosilicon compounds are a class of materials where organic groups (such as methyl, ethyl, or phenyl) are bonded to silicon atoms.
These compounds combine the desirable properties of both organic and inorganic materials, such as flexibility, hydrophobicity, and chemical stability.
Sodium methyl siliconate, as an organosilicon compound, bridges the gap between traditional silicates and more complex silicone polymers, allowing for versatile applications.
SIGNIFICANCE IN MODERN SCIENCE AND INDUSTRY
Sodium methyl siliconate plays a crucial role in the development of functional materials.
Its applications are diverse, ranging from water repellency in construction materials to surface treatments in the electronics industry.
The compound's versatility in both organic and inorganic chemistry positions it as a key component in material science research.
PURPOSE OF THE ARTICLE
This article aims to provide an in-depth analysis of sodium methyl siliconate, covering its synthesis, chemical properties, applications, environmental impact, and current research trends.
By delving into these areas, the article will serve as a comprehensive resource for scientists, engineers, and industrial professionals working with this compound.
CHEMICAL STRUCTURE AND PROPERTIES
Molecular Structure of Sodium Methyl Siliconate
The molecular structure of sodium methyl siliconate consists of a silicon atom (Si) bonded to one methyl group (CH₃) and an oxygen atom, with the oxygen atom also bonded to a sodium cation (Na⁺).
The general chemical formula can be represented as CH₃SiOₓNa, where x represents the degree of polymerization.
The silicon atom in SMS forms a tetrahedral configuration, with three bonds to oxygen atoms and one bond to a methyl group.
The structure imparts both organic and inorganic characteristics, making it highly reactive and adaptable to various applications.
CHEMICAL BONDING AND INTERACTIONS
In SMS, the silicon-oxygen bond is a key feature.
Silicon atoms have a strong affinity for oxygen, forming covalent bonds that give SMS its structural integrity.
The methyl group attached to the silicon atom creates hydrophobic interactions, enhancing the compound's water-repelling properties.
The sodium ion plays a significant role in solubility, especially in aqueous environments.
The interaction between the methyl group and sodium ions also contributes to the stability of SMS under various conditions.
PHYSICAL PROPERTIES
Melting Point:
Sodium methyl siliconate typically has a high melting point, owing to the strong Si-O bonds and the structure's overall stability.
Solubility:
Sodium Methyl Siliconate is soluble in water due to the ionic nature of the sodium component, while the methyl group confers hydrophobicity.
This dual solubility makes SMS suitable for various applications, particularly in coatings and sealants.
Stability:
SMS is stable under normal environmental conditions but can decompose under extreme temperatures or in the presence of strong acids or bases.
It remains stable in the presence of water but can undergo hydrolysis over time.
SPECTROSCOPİC CHARACTERIZATION
NMR (Nuclear Magnetic Resonance):
NMR spectroscopy can be used to identify the chemical shifts associated with the silicon, hydrogen, and carbon atoms in SMS.
This technique helps in understanding the molecular environment around the silicon atom.
IR (Infrared Spectroscopy):
Infrared spectra provide insights into the Si-O and C-H stretching vibrations, which are key to determining the compound's functional groups.
UV-Vis Spectroscopy:
UV-Vis spectroscopy can help evaluate the absorption characteristics of SMS, particularly in relation to its potential use in coatings and films.
SYNTHESIS OF SODIUM METHYL SILICONATE
METHODS OF SYNTHESIS
Sodium methyl siliconate is commonly synthesized through the reaction of sodium silicate (Na₂SiO₃) with methyl alcohol (methanol, CH₃OH).
The general reaction is as follows:
Na2SiO3+2CH3OH→2CH3SiO2Na+H2ONa 2 SiO 3 +2CH 3 OH→2CH 3SiO2Na+H2O
This process involves the alkylation of the sodium silicate by methanol, resulting in the formation of SMS and water as a byproduct.
REACTION MECHANISMS
The reaction between sodium silicate and methanol is an example of a nucleophilic substitution, where the methoxy group (CH₃O⁻) replaces a hydroxyl group (OH⁻) in the sodium silicate structure.
The methyl group from methanol is attached to the silicon atom, forming sodium methyl siliconate.
The reaction is typically carried out in the presence of a catalyst to improve yield and control the reaction's rate.
OPTIMIZING YIELD AND PURITY
To maximize yield and purity, factors such as temperature, concentration of reactants, and reaction time must be carefully controlled.
By adjusting these parameters, it is possible to produce SMS with high purity and minimize the formation of byproducts.
INDUSTRIAL SCALABILITY
Sodium methyl siliconate can be produced on an industrial scale by using continuous reactors that allow for efficient mixing of sodium silicate and methanol.
The reaction is typically carried out under mild conditions to avoid excessive decomposition and to ensure high-quality output.
REACTIVITY AND CHEMICAL BEHAVIOR
Reactivity with Water, Acids, and Bases
Sodium methyl siliconate is generally stable in water but can undergo hydrolysis under certain conditions.
In the presence of water, the Si-O bonds can break, releasing methanol and forming hydroxylated silicates.
The reactivity of SMS with acids and bases is similar to other organosilicon compounds.
Strong acids can lead to the hydrolysis of the methyl group, while bases may promote the formation of silanol groups (Si-OH).
Stability in Various Environments
The compound is stable under neutral conditions and can tolerate mild variations in temperature and humidity.
However, exposure to highly acidic or basic environments can lead to the degradation of the material. SMS is also sensitive to high temperatures, which may induce polymerization or decomposition.
Role of the Methyl Group
The methyl group in SMS plays a crucial role in enhancing the hydrophobicity and stability of the compound.
It reduces the water solubility of the material and protects the silicon atom from certain reactions, such as hydrolysis.
This contributes to the long-lasting properties of SMS in various applications.
APPLICATIONS OF SODIUM METHYL SILICONATE
Use in Coatings and Sealants
SMS is widely used in coatings and sealants due to its excellent water-repellent properties.
When applied to surfaces, SMS forms a thin, durable film that prevents moisture penetration, which is valuable in protecting materials from corrosion and degradation.
It is used in construction for waterproofing and in automotive industries for vehicle coatings.
Role in the Manufacture of Silicone Polymers
Sodium methyl siliconate serves as an intermediate in the synthesis of silicone polymers.
These polymers are used in a variety of applications, including lubricants, adhesives, and medical devices.
SMS contributes to the crosslinking of silicone polymers, enhancing their mechanical strength and flexibility.
Use in the Automotive Industry
In the automotive industry, SMS is used to improve the performance and longevity of exterior coatings.
It provides resistance to water, chemicals, and UV radiation, which helps maintain the appearance and functionality of automotive parts.
Applications in the Electronics Industry
SMS is employed in the electronics industry for surface treatments of components, ensuring that they are water-resistant and durable.
It is also used in the production of semiconductor devices and photovoltaic cells, where it helps improve the adhesion of conductive materials.
In Agriculture and as a Surfactant
SMS is used as a surfactant in agricultural formulations, helping improve the spreadability and effectiveness of pesticides and herbicides.
Its water-repellent properties are useful in protecting plants from water damage.
ENVIRONMENTAL IMPACT
Biodegradability and Environmental Safety
Sodium methyl siliconate is considered relatively safe for the environment.
Sodium Methyl Siliconate is biodegradable and breaks down into harmless byproducts such as silica and methanol.
However, its impact depends on the concentration and the method of disposal.
Potential Toxicology and Effects on Ecosystems
SMS is not highly toxic to aquatic life at typical concentrations used in industry.
However, prolonged exposure to large quantities may lead to environmental harm, particularly in aquatic ecosystems.
Research into its long-term effects is ongoing.
Regulations and Safety Standards
There are regulatory guidelines governing the safe handling and disposal of SMS in various countries.
It is important to follow these guidelines to minimize environmental risks and ensure worker safety.
INDUSTRIAL AND COMMERCIAL ASPECTS
Market Overview and Demand for SMS
The demand for sodium methyl siliconate is driven by its applications in industries like construction, automotive, and electronics.
The growing need for sustainable and durable materials is expected to drive future demand.
Key Manufacturers and Suppliers
Several chemical manufacturers and suppliers produce sodium methyl siliconate, with major players focusing on scaling up production to meet growing industrial demand.
Costs of Production and Economic Considerations
The production of SMS is relatively cost-effective, but prices can fluctuate based on raw material costs and production methods.
Economies of scale play a key role in making SMS affordable for large-scale industrial use.
Trends in Research and Development
Ongoing research is focused on improving the synthesis methods of SMS, exploring new applications, and enhancing its properties to meet emerging industrial needs.
COMPARISONS WITH OTHER SILICATES AND ORGANOSILICON COMPOUNDS
Comparison with Other Sodium Silicates
Sodium methyl siliconate is more hydrophobic and has better compatibility with organic systems compared to traditional sodium silicates, which are more water-soluble.
Differences from Other Methyl Silicates
Unlike dimethyl siliconate or trimethylsilane, SMS is specifically tailored for industrial applications that require a balance between organic and inorganic properties.
Applications Where SMS is Preferred
SMS is often preferred for applications where water resistance, stability, and ease of handling in aqueous solutions are crucial.
RECENT RESEARCH AND DEVELOPMENTS
Latest Scientific Discoveries
Recent research into SMS has focused on improving its performance in coatings, exploring its use as a binder in composite materials, and investigating its potential in sustainable technologies.
Innovations in Production Techniques
Advances in production technologies aim to reduce the energy required for SMS synthesis and enhance its purity, making it more efficient for large-scale applications.
New Applications
SMS is being explored for use in biodegradable materials, advanced coatings, and other environmentally friendly applications.
Summary of the Importance of Sodium Methyl Siliconate
Sodium methyl siliconate is a highly versatile organosilicon compound with applications across several industries, from coatings to agriculture.
Its unique properties, such as hydrophobicity and stability, make it a valuable material in modern technology.
Future Directions for Research and Application
The future of SMS is bright, with ongoing research aimed at enhancing its properties and discovering new, sustainable applications in materials science and beyond.
The continuous demand for high-performance, environmentally safe materials will drive innovation in SMS production and utilization.
SAFETY INFORMATION ABOUT SODIUM METHYL SILICONATE
First aid measures:
Description of first aid measures:
General advice:
Consult a physician.
Show this safety data sheet to the doctor in attendance.
Move out of dangerous area:
If inhaled:
If breathed in, move person into fresh air.
If not breathing, give artificial respiration.
Consult a physician.
In case of skin contact:
Take off contaminated clothing and shoes immediately.
Wash off with soap and plenty of water.
Consult a physician.
In case of eye contact:
Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician.
Continue rinsing eyes during transport to hospital.
If swallowed:
Do NOT induce vomiting.
Never give anything by mouth to an unconscious person.
Rinse mouth with water.
Consult a physician.
Firefighting measures:
Extinguishing media:
Suitable extinguishing media:
Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.
Special hazards arising from the substance or mixture
Carbon oxides, Nitrogen oxides (NOx), Hydrogen chloride gas
Advice for firefighters:
Wear self-contained breathing apparatus for firefighting if necessary.
Accidental release measures:
Personal precautions, protective equipment and emergency procedures
Use personal protective equipment.
Avoid breathing vapours, mist or gas.
Evacuate personnel to safe areas.
Environmental precautions:
Prevent further leakage or spillage if safe to do so.
Do not let product enter drains.
Discharge into the environment must be avoided.
Methods and materials for containment and cleaning up:
Soak up with inert absorbent material and dispose of as hazardous waste.
Keep in suitable, closed containers for disposal.
Handling and storage:
Precautions for safe handling:
Avoid inhalation of vapour or mist.
Conditions for safe storage, including any incompatibilities:
Keep container tightly closed in a dry and well-ventilated place.
Containers which are opened must be carefully resealed and kept upright to prevent leakage.
Storage class (TRGS 510): 8A: Combustible, corrosive hazardous materials
Exposure controls/personal protection:
Control parameters:
Components with workplace control parameters
Contains no substances with occupational exposure limit values.
Exposure controls:
Appropriate engineering controls:
Handle in accordance with good industrial hygiene and safety practice.
Wash hands before breaks and at the end of workday.
Personal protective equipment:
Eye/face protection:
Tightly fitting safety goggles.
Faceshield (8-inch minimum).
Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).
Skin protection:
Handle with gloves.
Gloves must be inspected prior to use.
Use proper glove
removal technique (without touching glove's outer surface) to avoid skin contact with this product.
Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices.
Wash and dry hands.
Full contact:
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril (KCL 740 / Aldrich Z677272, Size M)
Splash contact
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril (KCL 740 / Aldrich Z677272, Size M)
It should not be construed as offering an approval for any specific use scenario.
Body Protection:
Complete suit protecting against chemicals, The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace.
Respiratory protection:
Where risk assessment shows air-purifying respirators are appropriate use a fullface respirator with multi-purpose combination (US) or type ABEK (EN 14387) respirator cartridges as a backup to engineering controls.
If the respirator is the sole means of protection, use a full-face supplied air respirator.
Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU).
Control of environmental exposure
Prevent further leakage or spillage if safe to do so.
Do not let product enter drains.
Discharge into the environment must be avoided.
Stability and reactivity:
Chemical stability:
Stable under recommended storage conditions.
Incompatible materials:
Strong oxidizing agents:
Hazardous decomposition products:
Hazardous decomposition products formed under fire conditions.
Carbon oxides, Nitrogen oxides (NOx), Hydrogen chloride gas.
Disposal considerations:
Waste treatment methods:
Product:
Offer surplus and non-recyclable solutions to a licensed disposal company.
Contact a licensed professional waste disposal service to dispose of this material.
Contaminated packaging:
Dispose of as unused product
