ELT-S311 methyltrimethoxysilane Cas No.: 1185-55-3 EC No.: 214-685-0 Similar to: Dow-Corning Xia-meter Z6070,Momentive Sil-quest A163,Evonik Dy-nassylan MTMS,ShinE-tsu KBM13
Silane S311 is an important component as alkylalkoxysilane in sol-gel system.Silane S311 can hydrolyzes slowly in presence of moisture to form reactive silanols.The react can produce oligosiloxanes and then polysiloxanes.
Silane S311 is highly miscible with standard organic solvents,for example alcohols,acetone and hydrocarbons.But it can't soluble in water and will reacts only slowly to form silanols and higher condensation products.
1.Silane S311 is usually prepared from methyltrichlorosilane.
2. Silane S311 can be used as crosslinking agent for room temperature cured silicone rubber,coupling agent for glass fiber and SiO2.It also can be used as strengthing treatment agent for plastic-layer pressing material.Because of high reactivity,the most common alkoxy crosslinkers are methoxy or ethoxy silanes.
3.Silane S311 cna be used to render wide range of surfaces and materials water repelent,for example pigments,glass,cardbord,mineral fillers.Silane S311 also can be used in solution to treat fillers,using suitable mixing equipment.May be important to first pre-treat substrate with water and catalyst.
4.Silane S311 can be used in production of silicone resisn and condensation-curing silicone rubber.
5.The most common alkoxy crosslinkers are methoxy or ethoxy silanes due to their high reactivity.The reaction precedes by nucleophilic substitution usually in the presence of acid or base catalysts.Alkoxides react directly with silanols or with water to produce silanols.The newly formed silanols can react with otheralkoxides or self-condense to produce a siloxane bond and water.When an acid catalyst is used,protonation of the alkoxysilane increases the reactivity of the leaving group.When a base catalyst is used,deprotonation of the silanol forms a reactive silonate anion.The by-product of the reaction is an alcohol. Common metal catalysts for these reactions are alkoxytitanium derivatives and dibutytin dicarboxylates.
