DOWSIL Q2-7406
Harmonization Code : 8001.20 | Unwrought tin: Tin alloys
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
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Thermal Properties
Electrical Properties
Additional Information
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 |
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 |
