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WACKER® AK 20 is a linear, non-reactive polydimethylsiloxane with a viscosity of approximately 20 mm²/s. Its chemical structure gives it an exceptional property profile that distinguishes it from organic materials like mineral oils. It is chemically highly unreactive, has a low solidifying point, and exhibits high heat resistance.

CAS Number: 9006-65-9

Functions: Anti-Foaming Agent, Lubricant, Polishing Agent, Release Agent, Solvent, Water Repellent

Chemical Family: Siloxanes

Product Type: Heat Transfer Fluid, Hydraulic Fluids

Certifications & Compliance: BSE & TSE, Coalition of Northeastern Governors (CONEG), Consumer Product Safety Improvement Act (CPSIA), Directive 2000/53/EC, Directive 2011/65/EC amended through EU/2015/863 (RoHS), EC No.1907/2006, EU Packaging Directive (94/62/EC), FDA 21 CFR 175.105, FDA 21 CFR 176.180, FDA 21 CFR 176.200, FDA 21 CFR 176.210, FDA 21 CFR 177.2260, FDA 21 CFR 177.2800, FDA 21 CFR 178.3120, GB 9685-2016, REACH Exempt (Europe), Regulation (EC) No. 1005/2009, Regulation (EU) No. 1169/2011, Regulation (EU) No. 2019/1021, Waste Electrical & Electronic Equipment Directive (WEEE)

Synonyms: Dimethicone

Technical Data Sheet

Knowde Enhanced TDS

Identification & Functionality

Chemical Family
CAS No.
9006-65-9
EC No.
618-433-4
Chemical Structure

WACKER® AK 20 - Chemical Structure

Features & Benefits

Applications & Uses

Home Care Applications
Application Details
  • Due to WACKER® AK 200 many diverse applications, no general processing information can be provided. Parameters will vary from application to application.
  • Available in a range of viscosities, WACKER® SILICONE FLUIDS AK are miscible with each other in any ratio. The standard product's viscosity can thus be altered to suit your individual needs.
  • WACKER® AK 200 is a non-polar liquid and is immiscible with polar solvents such as water or short-chain alcohols.
  • In aliphatic and aromatic hydrocarbons, chlorohydrocarbons, ethers, esters, ketones and higher alcohols, WACKER® AK 200 is soluble in any proportion.
  • Before the product is used with solvents for the first time, it is advisable to perform a lab-scale test.
  • When solvents are used, please remember to read the appropriate hazard information.
    • Release agent
    • Lubricant
    • Hydraulic fluid
    • Antifoam agent
    • Water-repellent agent
    • Liquid dielectric for electrical and electronic equipment
    • Heat-transfer oil
    • Polish additive
    • Plastics additive
    • Additive for textile and fiber auxiliaries
  • For pharmaceutical applications, we recommend specialty silicone fluids from our SILFAR® line.
  • Silicone fluids from our BELSIL® line are available for the cosmetic sector.
  • Whenever particularly high heat and shear resistance is required, we recommend silicone fluids from our AK stab, AK visc and AKC product lines.
  • Specialty grades of the product (available as WACKER® PLASTICIZER) will be needed for use as a silicone plasticizer in RTV-1 sealants

Properties

Physical Form
Appearance
Clear colorless liquid
Typical Properties
ValueUnitsTest Method / Conditions
Density (at 25°C)approx. 0.95 g/cm³DIN 51757
Flash Pointmin. 175 °CISO 2719
Ignition Temperature390°CEN 14522
Kinematic Viscosity (at 25°C)approx. 20 mm²/sDIN 53019
Refractive Index (at 25°C)approx. 1.401DIN 51423
Surface Tension (at 25°C)0.021N/m
Properties
  • Minimal change in physical properties over a broad temperature range
  • Excellent water-repellent properties
  • Good dielectric properties
  • Low surface tension and thus high surface activity
  • Chemically highly unreactive
  • Low solidifying point
  • High heat resistance
  • High flash point
  • Good solubility in a wide range of solvents

Regulatory & Compliance

Packaging & Availability

Country Availability
Regional Availability
  • Africa
  • Asia
  • Europe
  • Latin America
  • Middle East
  • North America
  • Oceania

Storage & Handling

Storage Information

Maximum temperature allowed during storage and transportation: 50°C