DOWSIL Q2-7406

Harmonization Code : 8001.20 | Unwrought tin: Tin alloys

DOWSIL Q2-7406

Main features

  • Silicone PSA Tape Coating
  • High-Temperature Tape Adhesion
  • Adjustable Tack-Cohesion Balance

Product Description

DOWSIL Q2-7406 Adhesive is a solvent-borne silicone pressure-sensitive adhesive for coating tape backings. The translucent xylene dispersion contains 55 to 58% active ingredients and has a typical viscosity of 20,000 to 80,000 cP at 25 deg C. It can be applied with conventional tape-coating equipment, diluted with compatible solvents, or blended with other silicone pressure-sensitive adhesives before coating. After solvent removal, heat cure develops the film's tack, adhesive strength, and cohesive strength. Applications include general-purpose adhesive use and the production of splicing and plating tapes for elevated-temperature service.

Key features

  • Tape-coating processability: Can be applied to backing materials with conventional tape-coating equipment.
  • High-temperature adhesion: Supports splicing and plating tape applications exposed to elevated processing temperatures.
  • Adjustable cure balance: Catalyst concentration and heat cure can be used to balance tack, adhesive strength, and cohesive strength.

Applications / Suitable for

  • General-purpose pressure-sensitive adhesive coating
  • Splicing tapes
  • Plating tapes
Product Family

DOWSIL Q2-7406

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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
20,000 - 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.
3.5 x 10¹⁴ Ohms⋅cm

Additional Information

Technical properties

As-supplied / before-processing properties

Typical values for the adhesive dispersion as supplied.

Property Value Unit Method / condition
Appearance Translucent As supplied
Diluent Xylene As supplied
Active ingredients 55 to 58 % Typical
Viscosity 20,000 to 80,000 cP At 25 deg C
Specific gravity 0.98 At 25 deg C
Flash point 27 deg C Closed cup
Usable life 24 months At or below 32 deg C in original unopened containers
Technical properties

After-processing / final-state properties

Typical electrical properties of the cured adhesive film after 96 hours at 23 deg C and 50% relative humidity.

Property Value Unit Method / condition
Electric strength 653 V/mil 2 mil film on aluminum panel; 6.35 mm electrodes
Dielectric constant 2.93 At 10^2 Hz
Dielectric constant 2.87 At 10^5 Hz
Dissipation factor 0.004 At 10^2 Hz
Dissipation factor 0.001 At 10^5 Hz
Volume resistivity 3.5 x 10^14 ohm cm Cured adhesive film

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