Silicones

PDV-1631: Vinyl Terminated Diphenylsiloxane-Dimethylsiloxane Copolymer (Telechelic Functional Fluid)
These fluids are most often employed in 2-part addition cure silicone elastomers where special thermal or optical properties are required.
PDV-1631 Properties
Viscosity: 1,000 cStMolecular Weight: 19,000 g/molVinyl (eq/kg): 0.09-0.12Refractive Index: 1.465

DMS-S31: Silanol Terminated PDMS, 1,000 cSt (Telechelic Functional Fluid)
Terminal silanol groups render polydimethylsiloxanes susceptible to condensation under both mild acid and base conditions. They are intermediates for most room temperature vulcanizeable (RTV) condensation cure silicones. The reactivity of silanol fluids is utilized in applications other than RTVs. Low viscosity silanol fluids are employed as filler treatments and structure control additives in silicone rubber compounding. Intermediate viscosity (1,000-10,000 cSt) fluids can be applied to textiles as durable fabric softeners. High viscosity silanol terminated fluids form the matrix component in tackifiers and pressure sensitive adhesives.
DMS-S31 Properties
Viscosity: 1,000 cStMolecular Weight: 26,000 g/molWt.% OH: 0.1OH (eq/kg): 0.055-0.060

PDV-0541: Vinyl Terminated Diphenylsiloxane-Dimethylsiloxane Copolymer (Telechelic Functional Fluid)
These fluids are most often employed in 2-part addition cure silicone elastomers where special thermal or optical properties are required.
PDV-0541 Properties
Viscosity: 10,000 cStMolecular Weight: 60,000 g/molVinyl (eq/kg): 0.027-0.038Refractive Index: 1.430

DMS-S14: Silanol Terminated PDMS, 35-45 cSt (Telechelic Functional Fluid)
Terminal silanol groups render polydimethylsiloxanes susceptible to condensation under both mild acid and base conditions. They are intermediates for most room temperature vulcanizeable (RTV) condensation cure silicones. The reactivity of silanol fluids is utilized in applications other than RTVs. Low viscosity silanol fluids are employed as filler treatments and structure control additives in silicone rubber compounding. Intermediate viscosity (1,000-10,000 cSt) fluids can be applied to textiles as durable fabric softeners. High viscosity silanol terminated fluids form the matrix component in tackifiers and pressure sensitive adhesives.
DMS-S14 Properties
Viscosity: 35-45 cStMolecular Weight: 700-1,500 g/molWt.% OH: 30.-4.0OH (eq/kg): 1.7-2.3

Siloxane-Based Silane Reducing Agent
Organosilanes are hydrocarbon-like and possess the ability to serve as both ionic and free-radical reducing agents. These reagents and their reaction by-products are safer and more easily handled and disposed than many other reducing agents. The metallic nature of silicon and its low electronegativity relative to hydrogen lead to polarization of the Si-H bond yielding a hydridic hydrogen and a milder reducing agent compared to aluminum-, boron-, and other metal-based hydrides. A summary of some key silane reductions are presented in Table 1 of the Silicon-Based Reducing Agents brochure.
Pendant Functional Fluid; MethylHydrosiloxane-Dimethylsiloxane Copolymer, TMS Terminated
MethylHydrosiloxane copolymers are the primary cross linkers for 2-part vinyl-addition silicones and intermediates for functional copolymers.
Hydrogen dimethicone; Dimethylhydropolysiloxane; Dimethicone/methicone copolymer; Polysiloxanes dimethyl methyl hydrogen, Hydride functional polydimethylsiloxane; Siloxanes and silicones, dimethyl, methyl hydrogen
Viscosity: 110-150 cStMolecular Weight: 5,500-6,500 g/molMol% Hydride: 7-9Potential reducing agents in the mode of HMS-991 or HMS-997Extensive review of silicon based reducing agents: Larson, G.; Fry, J. L. "Ionic and Organometallic-Catalyzed Organosilane Reductions", Wipf, P., Ed.; Wiley, 2007

DMS-H11: Hydride Terminated PDMS, 7-10 cSt (Telechelic Functional Fluid)
Hydride terminated silicones are chain extenders for vinyl-addition silicones, enabling low-viscosity, high elongation formulations. They are also intermediates for functionally terminated silicones.
DMS-H11 Properties
Viscosity: 7-10 cStMolecular Weight: 1,000-1,100 g/molWt.% Hydride: 0.2

PDV-1641: Vinyl Terminated Diphenylsiloxane-Dimethylsiloxane Copolymer (Telechelic Functional Fluid)
These fluids are most often employed in 2-part addition cure silicone elastomers where special thermal or optical properties are required.
PDV-1641 Properties
Viscosity: 10,000 cStMolecular Weight: 55,000 g/molVinyl (eq/kg): 0.033-0.040Refractive Index: 1.465

DMS-S45: Silanol Terminated PDMS, 50,000 cSt (Telechelic Functional Fluid)
Terminal silanol groups render polydimethylsiloxanes susceptible to condensation under both mild acid and base conditions. They are intermediates for most room temperature vulcanizeable (RTV) condensation cure silicones. The reactivity of silanol fluids is utilized in applications other than RTVs. Low viscosity silanol fluids are employed as filler treatments and structure control additives in silicone rubber compounding. Intermediate viscosity (1,000-10,000 cSt) fluids can be applied to textiles as durable fabric softeners. High viscosity silanol terminated fluids form the matrix component in tackifiers and pressure sensitive adhesives.
DMS-S45 Properties
Viscosity: 50,000 cStMolecular Weight: 110,000 g/molWt.% OH: 0.03OH (eq/kg): 0.015-0.017