Introduction:

Escoat RA-150W Release Coat is a high quality release coating developed for pressure sensitive adhesive tapes to provide controlled release.  It adheres well to polyester and corona or flame treated polyolefins.  It provides excellent release, even in high humidity environments, with rubber, solvent acrylic and hot-melt adhesives.  Escoat RA-150W Release Coat may also be used as a water based over print varnish having good gloss, release power and a low coefficient of friction.

Material Description: Aqueous Polyurethane Release Coat

Chemical Name: Aliphatic modified polyurethane aqueous dispersion

Empirical Formula: [-OCO(CH2)2OCONH(CH2)6NH-]n

Molecular Weight: [230.3]n

Physical Properties: Appearance:                           Clear to slightly hazy liquid

Ionic Characteristic:                Anionic

Total Solids in %:                    25 ± 2

pH:                                          8.3 +/- 1.0

Water Solubility:                      Completely soluble

Specific Gravity (H20=1):       1.1

Brookfield Viscosity               (#1RV @100rpm):                  20-60 cps

Flash point:                             >100 °C (>212 °F) [Closed cup]

Mixing Instructions:

Dilute with water and mix thoroughly to achieve desired solids concentration. Recommended applications solids concentration, usually in the range of 1.0 – 1.5% solids, is best determined by trial. Apply using Meyer rod, Anilox or Gravure rollers at 4-5 gm/m2. Dry coating thoroughly at between 80 to 100°C depending on web speed and oven efficiency before rewinding. No curing mechanism is required.

Advantages:

• Water based system.
• Compatible with all standard adhesive systems.
• Provides a controlled release effect.

Storage:

The shelf life of Escoat RA-150W Release Coat is at least 6 months when stored in securely closed containers in cool, dry storage locations. Despite a very good freeze thaw stability, it is advised to protect from low temperature (below 32°F). Stir before use.