Silicones

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; polyMethylHydrosiloxanes, TMS Terminated
MethylHydrosiloxane homopolymers are used as water-proofing agents, reducing agents and as components in some foamed silicone systems.
Poly(methylhydrosiloxane); Methyl hydrogen siloxane; Polysiloxanes, methyl hydrogen; Siloxanes and silicones, methyl hydrogen
Viscosity: 15-25 cStMolecular Weight: 1,400-1,800 g/molMol% Hydride: 100Reduces lactones to lactolsReduces aldehydes, ketones, esters, lactones, triglycerides and epoxides to alcohols with zinc hydride catalysisWith titanium tetraisopropoxide catalysis carries out reductive amination of ketones and aldehydes and the reduction of acids or esters to 1° alcoholsWith TBAF catalysis selectively reduces aldehydes over ketonesUsed to generate tri-n-butyltin hydride ‘in-situ’ and in a one-pot hydrostannylation/Stille coupling sequenceReduces esters to alcoholsExtensive review of silicon based reducing agents: Larson, G.; Fry, J. L. "Ionic and Organometallic-Catalyzed Organosilane Reductions", Wipf, P., Ed.; Wiley, 2007

DMS-H21: Hydride Terminated PDMS, 100 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-H21 Properties
Viscosity: 100 cStMolecular Weight: 4,000-5,000 g/molWt.% Hydride: 0.04

DMS-V46: Vinyl Terminated PDMS, 60,000 cSt (Telechelic Functional Fluid)
Vinyl terminated polymers are most often employed in 2-part addition cure silicone elastomers.
DMS-V46 Properties
Viscosity: 60,000 cStMolecular Weight: 117,000 g/molWt.% Vinyl: 0.04-0.06Vinyl (eq/kg): 0.018-0.020