DOWSIL 280A

Harmonization Code : 3208.20.90 | Paints and varnishes that are dispersed or dissolved in a non aqueous medium

DOWSIL 280A

Main features

  • Tack/Adhesion up to 260 deg C
  • Solvent-Based Peroxide-Cure Silicone PSA
  • Masking, Plating, and Splicing Tapes

Product Description

DOWSIL™ 280A Adhesive is a solvent-based silicone pressure-sensitive adhesive formulated for masking, plating, and splicing tape constructions. The peroxide-cure adhesive combines good tack with adhesion performance at temperatures up to 260°C (500°F), making it relevant for tape applications that require temporary or process-stage attachment during elevated-temperature operations. Its reported nonvolatile content of 57%, viscosity of 38,900 mPa·s, and specific gravity of 0.98 at 25°C provide useful selection data for coating and converting evaluation.

Key features

  • High-temperature adhesion: Provides good tack and adhesion at temperatures up to 260°C (500°F).
  • Silicone pressure-sensitive adhesive: Solvent-based, peroxide-cure formulation for specialty tape constructions.
  • High-tack application profile: Suitable for tape applications requiring a balance of properties with emphasis on tack.

Applications / Suitable for

  • Masking tapes
  • Plating tapes
  • Splicing tapes
Product Family

DOWSIL 280A

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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
30000–80000 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.
4E13 Ohms⋅cm

Additional Information

Technical properties

As-supplied / before-processing properties

Typical properties of DOWSIL™ 280A Adhesive as supplied.

Property Value Unit Method / condition
Nonvolatile content 57 % Typical value
Viscosity 38,900 mPa·s Typical value
Specific gravity 0.98 — At 25°C
Flash point 27 °C Closed cup
Shelf life 270 days  

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