DIMETHOXYDIPHENYLSILANE

PRODUCT IDENTIFICATION

CAS RN

EINECS RN

FORMULA

MOLE WEIGHT

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE

MELTING POINT

BOILING POINT

DENSITY

1.08

SOLUBILITY IN WATER

pH

VAPOR DENSITY

REFRACTIVE INDEX

FLASH POINT

121 C

INCOMPATIBLE MATERIALS

Strong oxidizing agents, Water

Carbon oxides, silicon oxides

Will not occur.

NFPA RATINGS

Health: 2. Flammability: 1, Reactivity: 0

SAFETY

HAZARD NOTES

Combustible Liquid, Irritant

EYE

Causes eye irritation.

SKIN

May be harmful if absorbed through skin. Causes skin irritation.

INGESTION

May be harmful if swallowed.

INHALATION

May be harmful if inhaled. Causes respiratory tract irritation.

CHRONIC

TRANSPORT & REGULATORY INFORMATION

UN NO.

HAZARD SYMBOL

XI

RISK PHRASES

38

SAFETY PHRASES

26-36

EXTERNAL LINKS & GENERAL DESCRIPTION

Wikipedia Linking

Silane : http://en.wikipedia.org/wiki/Silane

Siloxane: http://en.wikipedia.org/wiki/Siloxane

Although Organosilane might seem like a confusing compound, it is actually quite useful in many different situations. First of all, it is used in mixtures with hydrogen peroxide. When the peroxide is mixed with an Organosilane quaternary compound in an aqueous formulation, the mixture can be used to improve the way that water and soil can be repelled from surfaces. This creates a coating composition that is at the same time used for cleaning, as well as other multifunctional coating purposes.
Because of the unique properties that Organosilanes have, they can repel water, dirt, and other substances away from the item that they coat. Therefore, a mixture of Organosilane and hydrogen peroxide can be applied to an item, and it will give the item a protective coating that cannot be penetrated. There are many different surfaces that benefit from being coated with the Organosilane mixture. These surfaces include metal, plastic, glass, rubber, ceramic, porcelain, marble, cement, granite, tile, silica, sand, appliances that have been enameled, polyester, polyurethane, polyacrylic, resins that are melamine or phenoilic, siliceous, polycarbonate, and wood, as well as painted surfaces. This is an incomplete list, as there are many different surfaces that can benefit from being coated with the Organosilane that is now used in many different situations. (http://www.articlesbase.com/)

There are many uses for Siloxane; all of this proves to be quite useful for the common person. Siloxane, most of the time, is used in many different products like cosmetics, deodorants, and defoamers. These are three of the main types of products that contain Siloxane, and the Siloxane in them is used there because of its natural bonding properties. There are also Siloxane components that are found in products that repel water, such as those that coat windshields. Also, Siloxane is found in food additives, and can be found in some soaps as well .Therefore, Siloxane is something that is found in many different types of products, occurring all over the world. (http://www.articlesbase.com/)

Often the silane is subjected to hydrolysis prior to the surface treatment. Following hydrolysis, a reactive silanol group is formed, which can condense with other silanol groups, for example, those on the surface of siliceous fillers, to form siloxane linkages. Stable condensation products are also formed with other oxides such as those of aluminum, zirconium, tin, titanium, and nickel. Less stable bonds are formed with oxides of boron, iron, and carbon. Alkali metal oxides and carbonate do not form stable bonds with Si-O. Sufficient water for hydrolysis may be available from atmospheric moisture, or on the substrate surface. In some cases, it may be necessary to add water to increase the degree of hydrolysis. The most straightforward method of silylating a surface with silane is from an alcohol solution. A two percent silane solution can be prepared in the alcohol of choice (methanol, ethanol, and isopropanol are typical choices). The solution can be wiped, dipped, or sprayed onto the surface. When dipping a large object, e.g., glass plates, allow one to two minutes of submersion to allow silane migration to the surface. After the surface dries, excess material can be gently wiped, or briefly (alcohol) rinsed off. Particles, e.g., pigments and fillers, can be silylated by stirring them in a solution for two to three minutes and then decanting the solution. The particles can then be rinsed with alcohol. Cure of the silane layer is for 5-10 min at 110°C or for 24 hr at ambient conditions. There are three basic methods of utilizing silanes in a coatings application: (1) surface treatment, which includes particle (i.e.,pigments and fillers) treatment formulated into primers, and water repellents; (2) additive into paints, inks, and adhesives; and (3) reactive intermediate for silicone resin synthesis and organic resin modification. Each of these methods requires special consideration.(http://www.dowcorning.com/)

Trialkoxysilanes are hypothesized to promote adhesion through a combination of two general mechanisms. In the first mechanism, a "coupling" reaction may occur between the organic functional group of the silane molecule and the polymer matrix, resulting in a chemically covalent bond between the two species. This reaction is accompanied by the hydrolysis of alkoxy groups to form silanols, which can either directly condense to form covalent bonds with the inorganic surface, or can physically adsorb and bond through forces such as hydrogen bonding or electrostatic interactions. In a second mechanism, the alkoxy groups can hydrolyze to form silanols, which then condense to form silsesquioxane networks that can compatibly blend and interpenetrate with the polymer matrix at the interface, while simultaneously adsorbing onto the surface of the inorganic substrate either through direct condensation, or through physical adsorption via secondary chemical bonding interactions. (http://aaparkerconsulting.home.att.net/)

Silane applications include:

• Adhesion Promoter
• Catalyst
• Coupling Agent
• Crosslinking Agent
• Curing Agent
• Dispersing Agent
• Hydrophobic additive
• Hydrophobic surface treatment
• Moisture Scavenger
• Organosilicone intermediate
• Polyurethane Endcapper
• Reinforcer
• Silyl Building Blocks and Synthons
• Silylating Agent
• Thermal Stabilizer

SALES SPECIFICATION

APPEARANCE

PURITY

98.0% min (GC)

PRICE