TRAPYLEN 189 S: New Adhesion Promoter For Printing Inks With ECHA-Compliant Stabilizer

TRAMACO is launching TRAPYLEN 189 S, a newly developed adhesion promoter specially designed for use in printing inks - especially in screen printing. The chlorinated polypropylene impresses with its ECHA-compliant stabilizer and opens up a wide range of application and processing options in plastic coating and solvent-based adhesives.

Product features and advantages

• High compatibility and very good pigment wetting capacity: TRAPYLEN 189 S ensures excellent adhesion and at the same time a high gloss level and good weather resistance.
• Versatile areas of application: In addition to its use as a binder for printing inks (especially screen printing), TRAPYLEN 189 S can also be used as an adhesion promoter in plastic coatings and solvent-based adhesives (including NR/SBR and polychloroprene-based adhesives).
• Proven adhesion to polypropylene, PP/EPDM and thermoplastic rubbers: Limited adhesion to polyethylene is also possible.
• Grease and oil resistance: For higher requirements, TRAPYLEN 189 S can be combined with other TRAPYLEN grades with a lower chlorine content.

Processing and application

1. Protection from moisture and sunlight
   To ensure the quality of the product, direct sunlight and humidity should be avoided. TRAPYLEN 189 S is also available in pre-dissolved form if required.
2. Solubility and solution recommendation
   • Soluble in aromatics, ethyl acetate and ketones
   • Insoluble in aliphatics and alcohols
   • Preparation of the solution: First place the solvent in a suitable container. Then add TRAPYLEN 189 S while stirring (dissolver). The resin dissolves by shearing; the temperature should rise to approx. 60 °C and be maintained for approx. 3 hours. The solids content is then adjusted to the desired concentration with additional solvent and filtered.
3. Additional quantity and further processing
   The necessary amount to be added to the main matrix must be determined for each application by appropriate tests
   • Screen printing varnish: Usual application quantity is 3–4 g/m², drying time approx. 30 seconds at 80 °C.

Technical data

• Product name: TRAPYLEN 189 S
• Chemical character: Chlorinated polypropylene
• Texture: Brittle, slightly yellow and transparent granules
• Chlorine content [%]: 36
• Viscosity (dyn.) (50% in ethyl acetate) [mPas]: 400