DOWSIL 282

Harmonization Code : 8001.20 | Unwrought tin: Tin alloys

DOWSIL 282

Main features

  • High-Adhesion Tape Formulation
  • 55-57% Active Silicone Content
  • Cured-Film Electrical Insulation

Product Description

DOWSIL 282 Adhesive is a high-viscosity silicone pressure-sensitive adhesive dispersion for coating backing materials used in masking, plating and related tape constructions. The xylene-diluted product contains 55-57% active ingredient and has a typical viscosity range of 30,000-80,000 cP at 25 deg C, supporting conventional tape-coating processes. Solvent removal and controlled peroxide-catalyzed heat cure develop the balance of tack, adhesive strength and cohesive strength required in the converted adhesive film. Cured-film electrical values apply to a 2 mil adhesive film on an aluminum panel after 96 hours at 23 deg C and 50% relative humidity.

Key features

  • 55-57% active ingredient: Provides a concentrated silicone adhesive dispersion for tape coating.
  • High-viscosity coating control: Typical viscosity is 30,000-80,000 cP at 25 deg C.
  • Cured-film electrical data: Electrical values apply to a conditioned 2 mil film on aluminum.

Applications

Masking and plating tapes and other pressure-sensitive adhesive constructions requiring high adhesion.

Product Family

DOWSIL 282

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Translucent
Specific Gravity
Specific gravity (SG) is the ratio of the density of a substance to the density of a reference substance; equivalently, it is the ratio of the mass of a substance to the mass of a reference substance for the same given volume. For liquids, the reference substance is almost always water (1), while for gases, it is air (1.18) at room temperature. Specific gravity is unitless.
0.98
Physical Properties
Viscosity
Viscosity is a measurement of a fluid’s resistance to flow. Viscosity is commonly measured in centiPoise (cP). One cP is defined as the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP. A product like honey would have a much higher viscosity -around 10,000 cPs- compared to water. As a result, honey would flow much slower out of a tipped glass than water would. The viscosity of a material can be decreased with an increase in temperature in order to better suit an application
30,000–80,000 mPa.s
Thermal Properties
Flash Point
The flashpoint of a solvent is the lowest possible temperature at which it can vaporize to form an ignitable vapor. Flashpoint is often confused with “autoignition temperature”, which is the temperature at which a solvent ignites without an ignition source.
27 °C
Electrical Properties
Volume Resistivity
Volume resistivity, also called volume resistance, bulk resistance or bulk resistivity is a thickness dependent measurement of the resistivity of a material perpendicular to the plane of the surface.
7.2 x 10¹⁵ Ohms⋅cm

Additional Information

Technical properties

As-supplied / before-processing properties

Typical as-supplied dispersion properties. Values are not specifications.

Property Value Unit Method / condition
Appearance Translucent As supplied
Diluent Xylene As supplied
Active ingredient 55-57 % Silicone solids content
Viscosity 30000-80000 cP At 25 deg C
Specific gravity 0.98 At 25 deg C
Flash point 27 (81) deg C (deg F) Tag closed cup
Technical properties

After-processing / final-state properties

Electrical properties of a cured 2 mil adhesive film on an aluminum panel, conditioned 96 hours at 23 deg C and 50% relative humidity.

Property Value Unit Method / condition
Electric strength 1500 V/mil 6.35 mm electrodes; 2 mil cured film
Dielectric constant 2.98 At 100 Hz
Dielectric constant 2.87 At 100 kHz
Dissipation factor 0.005 / 0.004 At 100 Hz / 100 kHz
Volume resistivity 7.2 x 10^15 ohm cm Conditioned cured film

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