Technical Library

Siloxane and silicone diluents can reduce the viscosity of epoxy systems as well as lowering surface tension allowing ease of handling, facilitating higher filler loading and infiltration of prepregs and fine structural components. Monofunctional silicone compounds with molecular weights high enough to be considered polymers are sometimes referred to as macromers. Copolymerization of macromers with traditional monomers offers a route to polymers with properties that are usually associated with grafting. Modification of organic polymers with silicon-containing macromers has led to new applications in coatings and pigment vehicles.

Monofunctional Low MW Siloxanes

Product CodeStructureNameMolecular WeightBP/mm (MP) (°C)Density
D420
Refractive Index
nD20
CommentsCAS
SIG5820.0(3-glycidoxypropyl)bis(trimethylsiloxy)methylsilane336.6596/0.50.9101.4206flashpoint: >110 °C[7422-52-8]
TSCA
SIG5838.0(3-glycidoxypropyl)pentamethyldisiloxane262.5081/1.50.915251.4267flashpoint: 83 °C[18044-44-5]

Mono (2,3-Epoxy)Propylether-Terminated Polydimethylsiloxanes - asymmetric, CAS:[1108731-31-2]/[127947-26-6], TSCA

Product CodeViscosity (cSt)Molecular WeightRefractive IndexDensity
MCR-E1110-151,0001.4100.96
MCR-E211205,0001.4080.97

Mono (2,3-Epoxy)Propylether-Functional Polydimethylsiloxanes - symmetric

Product CodeViscosity (cSt)Molecular WeightRefractive IndexDensity
MCS-E1545-55800-9001.3981.09