CAS 70131-67-8

Polysiloxanes, di-Me, hydroxy-terminated

Description:

Polysiloxanes, di-Me, hydroxy-terminated, commonly referred to as hydroxyl-terminated polydimethylsiloxane (PDMS), are a class of silicone polymers characterized by their repeating siloxane (Si-O) units. These compounds typically exhibit a linear structure with methyl groups (Me) attached to the silicon atoms and hydroxyl (–OH) groups at the terminal ends. This structure imparts unique properties, including flexibility, low surface tension, and excellent thermal stability, making them suitable for a variety of applications. They are often used as intermediates in the synthesis of silicone elastomers, sealants, and coatings due to their ability to form strong bonds with other materials. Additionally, their hydrophobic nature and low toxicity make them valuable in cosmetic formulations and medical applications. The presence of hydroxyl groups allows for further chemical modification, enhancing their versatility in various industrial processes. Overall, polysiloxanes with this specific structure are integral to many fields, including materials science, pharmaceuticals, and consumer products.

Formula: Unspecified

Synonyms:

• Poly(dimethylsiloxane),hydroxy
• Sh-Qy
• α-Hydro-ω-hydroxypoly(dimethylsiloxane)
• Hydroxy silicone oil
• Polydimethylsiloxane, silanol terminated
• PS 195
• OH Polymer
• Polysiloxanes, di-Me, hydroxy-terminated
• Hydroxy-terminated di-Me siloxanes
• Di-Me hydroxy-terminated siloxanes
• Siloxanes and Silicones, di-Me, hydroxy-terminated

Silanol terminated polydimethylsiloxane cSt 35-45

CAS: 70131-67-8

Color and Shape: Liquid, Clear Liquid

Molecular weight: 0.0

Ref: 10-DMS-S14

Silanol terminated polydimethylsiloxanes cSt 50,000

CAS: 70131-67-8

DMS-S45 - Silanol terminated polydimethylsiloxanes cSt 50,000

Color and Shape: Liquid, Clear

Molecular weight: 0.0

Ref: 10-DMS-S45

SILANOL TERMINATED POLYDIMETHYLSILOXANE, 3,500 cSt

CAS: 70131-67-8

DMS-S33: Silanol Terminated PDMS, 3,500 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-S33 Properties
Viscosity: 3,500 cStMolecular Weight: 43,500 g/molWt.% OH: 0.8OH (eq/kg): 0.045-0.050

Color and Shape: Liquid

Molecular weight: 43500.0

Ref: 3H-DMS-S33

SILANOL TERMINATED POLYDIMETHYLSILOXANE,18,000 cSt

CAS: 70131-67-8

DMS-S42: Silanol Terminated PDMS, 18,000 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-S42 Properties
Viscosity: 18,000 cStMolecular Weight: 77,000 g/molWt.% OH: 0.4OH (eq/kg): 0.023-0.025

Color and Shape: Liquid

Molecular weight: 77000.0

Ref: 3H-DMS-S42

SILANOL TERMINATED POLYDIMETHYLSILOXANE, 90-120 cSt

CAS: 70131-67-8

DMS-S21: Silanol Terminated PDMS, 90-120 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-S21 Properties
Viscosity: 90-120 cStMolecular Weight: 4,200 g/molWt.% OH: 0.8-0.9OH (eq/kg): 0.47-0.53

Color and Shape: Liquid

Molecular weight: 4200.0

Ref: 3H-DMS-S21