18132-72-4

Usage

Chemical Properties

Colorless or yellowish transparent liquid

InChI:InChI=1/C10H24Cl2OSi2/c1-14(2,9-5-7-11)13-15(3,4)10-6-8-12/h5-10H2,1-4H3

Upstream product

• 107-46-0 Hexamethyldisiloxane 
• 10605-40-0 (3-chloropropyl)dimethylchlorosilane 
• 3277-26-7 1,1,3,3-Tetramethyldisiloxane 
• 107-05-1 3-chloroprop-1-ene 
• 67-56-1 methanol 
• 13508-63-9 chloropropyl(dimethyl)ethoxysilane 
• 1432587-27-3 (2-bromoethyl)(3-chloropropyl)dimethylsilane 
• 421-85-2 Trifluoromethanesulfonamide 
• 88820-71-7 6-chloro-3,3-dimethyl-3-silahex-1-ene 

Downstream Products

• 441307-02-4 1,3-(bishydroxyethoxypropyl)-1,1,3,3-tetramethyldisiloxane 
• 17866-53-4 1,3-bistetramethyldisiloxane 

Relevant academic research and scientific papers

Synthesis and properties of dicationic ionic liquids containing a siloxane structural moiety

Five new ionic liquids formed by doubly charged cations containing a siloxane moiety and bis(trifluoromethylsulfonyl) imide anion are synthesized and characterized. Their thermal stability is studied by means of TGA; melting points (glass transition temperatures) and densities are measured. The temperature dependences of kinematic viscosity of the obtained ionic liquids are presented along with their approximations by the Vogel-Tammann-Fulcher equation.

Acid-Catalyzed Rearrangement of Azidopropyl-Siloxane Monomers for the Synthesis of Azidopropyl-Polydimethylsiloxane and Their Carboxylic Acid Derivatives

In this work, we were the first to show the possibility of synthesizing polydimethylsiloxanes (PDMSs) with azidopropyl-functional groups at the silicon atom by the classical methods for PDMS synthesis, that is, ring-opening polymerization (ROP) and catalytic rearrangement of siloxanes in the presence of a strong acid (CF3SO3H). The suggested method was used to obtain PDMSs containing azidopropyl-functional groups at both ends of the polymer chain (telechelics) as well as PDMSs with irregular structures containing different fractions (5-50%) of azidopropyl-functional groups in the main polymer chain. The suggested method also proved to be efficient for synthesizing PDMSs containing both azidopropyl- and hydridosilyl-functional groups simultaneously. As a result, PDMSs with different mutual arrangements of two types of functional groups along the PDMS chain were obtained. The method for the catalytic rearrangement of low-molecular-weight siloxanes that we used made it possible to obtain azidopropyl-functional PDMSs in a wide range of molecular weights from 2000 to 88,000 according to gel permeation chromatography (GPC) data. The possibility of further modification of the resulting azidopropyl-functional PDMS, as well as multifunctional PDMSs containing azidopropyl- and hydridosilyl-functional groups simultaneously, by azide-alkyne cycloaddition reactions was demonstrated. The polymers obtained were characterized by 1H and 29Si NMR spectroscopy and by GPC.

Dicationic disiloxane ionic liquids as heat transfer agents in vacuo

Bis(trifluoromethylsulfonyl)imidic dicationic liquids containing a disiloxane linker between the imidazole cations have been synthesized. Their thermal stability was estimated, and their melting points, viscosity, and volatility in vacuo were measured. The opportunity to use these ionic liquids as heat transfer agents in a dynamic vacuum has been shown.

Properties of dicationic disiloxane ionic liquids

A number of dicationic ionic liquids with a disiloxane linker between imidazolium cations and bis(trifluoromethylsulfonyl)imide anion were synthesized and characterized. Melting points, viscosity, and volatility in a vacuum were measured; the thermal and hydrolytic stability of ionic liquids were also studied. The dependence of the properties on the structure of substituents in the cation of the ionic liquid was demonstrated.

Controlled anchoring of (Phenylureido)sulfonamide-based receptor moieties: An impact of binding site multiplication on complexation properties

The repetition of urea-based binding units within the receptor structure does not only lead to monomer properties multiplication. As confirmed by spectroscopic studies, UV-Vis and1H-NMR in classical or competitive titration mode, the attachment

Heteroatom-containing hydroxyalkyl disiloxane and preparation method and application thereof

The invention provides heteroatom-containing hydroxyalkyl disiloxane and a preparation method and application thereof. The preparation method comprises the steps of preparing a hydrolysis condensationproduct by using chlorosilane (II) as a starting material through a hydrolysis condensation reaction; and carrying out nucleophilic substitution or Williamson etherification reaction on a chloroalkylgroup in the hydrolysis condensation product and a mercapto group, an amine group or an alkoxide group in the hydroxyl compound (III) to obtain the heteroatom-containing hydroxyalkyl disiloxane. Thepreparation method is simple and convenient in steps, mild in reaction conditions, easy to realize and control in reaction conditions, short in preparation period, low in cost and high in target product yield and purity. The heteroatom-containing hydroxyalkyl disiloxane prepared by the preparation method disclosed by the invention can be used for preparing novel silicon-containing polymers such ashydroxyalkyl-terminated polysiloxane or organosilicon modified polyurethane (urea) or polyester, so that the material is endowed with better performance and wider application.

Dicationic polysiloxane ionic liquids

Dicationic ionic liquids with bis(trifluoromethylsulfonyl)imide anions and dimethylimidazolic moieties linked by the polymeric siloxane chain in the cation structure have been synthesized. Thermal stability of the compounds synthesised was studied by TGA; glass transition temperatures, viscosities and volatility in vacuo were measured. Applicability of these ionic liquids as heat carriers under high dynamic vacuum conditions is shown.

The products of substitution and cyclization in the reaction of (2-bromoethyl)(3-chloropropyl)dimethylsilane with triflamide

In order to synthesize the first seven-membered N-triflylazasilacycloalkane the reaction of triflamide with (2-bromoethyl)(3-chloropropyl)dimethylsilane was studied. Depending on the reaction conditions bis(3-chloropropyl) tetramethyldisiloxane, 3-trifluo

Catalytic reactions of hydrosiloxanes with allyl chloride

Catalytic reactivity of Si-H bond of di-, trisiloxanes with allyl chloride in the presence of platinum catalyst has been examined. Hydrosilylation process competes with hydrogen substitution by chlorine and/or propenyl group. The effect of the reaction conditions as well as structure of siloxane on the yield and selectivity of the number of products has been discussed. Several consecutive-competitive processes have been identified. The results obtained can be helpful in the study of the catalytic hydropolysiloxanes reactions with allyl derivatives-systems of great practical importance, to produce commercial functionalized silicones.

The coupling agent and a silane polyfunetional organooligomer can be used as a method for manufacturing the same

A monohydroxysilane polysulfide of the formula:in which the radicals R, which may be identical or different, are hydrocarbon groups preferably comprising from 1 to 15 carbon atoms; the radicals R', which may be identical or different, are divalent linking groups preferably comprising from 1 to 18 carbon atoms; x is greater than or equal to 2. This hydroxysilane is in particular a bis-(propyidimethylsilanol) polysulfide. A process for obtaining such a hydroxysilane by alcoholysis and/or hydrolysis of a halogenated organosilane, followed by a sulfuration stage. Use of this hydroxysilane as a coupling agent.