Transparent soft touch topcoat - formula

This formulation is designed for a transparent soft touch topcoat, providing a smooth and tactile finish. It includes a mix of acrylic copolymer emulsion, elastomer-copolymer, various additives, and rheology modifiers to enhance performance and application properties.

Components and Their Functions:

1. Acrylic Co-polymer Emulsion (Neocryl XK-98)*
   • Function: Acts as the primary binder, providing adhesion and forming a durable film upon drying.
2. Water
   • Function: Serves as the vehicle, dissolving and carrying other components.
3. Elastomer-Copolymer in Water (Deuteron SO 302)*
   • Function: Soft-feel additive, enhancing the tactile properties of the topcoat.
4. Emulsion of Polysiloxanes (Drewplus S-4386)*
   • Function: Foam control agent, reducing foam formation during application.
5. Blend of UV-Absorber + HALS (Eversorb AQ-1)
   • Function: Light stabilizing additive, protecting the coating from UV degradation.
6. Biocide (Nuosept BM11)*
   • Function: In-can preservative, preventing microbial growth and extending shelf life.
7. Ester Alcohol (Texanol)*
   • Function: Coalescing agent, aiding in the film formation process by promoting the merging of polymer particles.
8. Polyether-Modified Polysiloxane (BYK 346)
   • Function: Substrate wetting, enhancing the coating's spreadability and adhesion.
9. Nonionic Synthetic Associative Thickener (NSAT) (Aquaflow™ NLS-220E)
   • Function: Rheology modifier, adjusting the viscosity and flow properties for better application.
10. Nonionic Synthetic Associative Thickener (NSAT) (Aquaflow™ NHS-350E)
    • Function: Additional rheology modifier, further fine-tuning viscosity and flow properties.
11. Water
    • Function: Additional vehicle, ensuring the right consistency and viscosity.

Properties:

• Total Weight: 100 kg
• Viscosities:
  • Brookfield (Spl6/100RPM): 21,800 mPa·s
  • Stormer: 99 KU
  • Cone and Plate: 210 mPa·s
• Leveling:
  • Leneta: 10 (1-10; 10=Best)
  • NYPC: 6 (1-10; 10=Best)
• Sag Resistance: 150 microns
• Specific Mass: 1.03 kg/m³
• Gloss (60°): 6 GU
• pH: 8 – 9

Preparation Procedure:

1. Initial Mixing:
   • Add water to a mixing container.
   • Gradually add the acrylic co-polymer emulsion and stir to ensure proper dispersion.
2. Additives:
   • Incorporate the elastomer-copolymer, foam control agent, light stabilizing additive, and biocide in sequence, ensuring each is well-mixed before adding the next.
3. Final Additions:
   • Add the ester alcohol and polyether-modified polysiloxane, followed by the rheology modifiers (NSAT Aquaflow™ NLS-220E and NHS-350E).
   • Add the remaining water and stir until a homogeneous mixture is achieved.

Legal and Trademark Information:

• This formulation and the trademarks mentioned are the property of Ashland or its subsidiaries, with some trademarks owned by third parties.
• The document includes a disclaimer about the accuracy and reliability of the information, stating that it should not be taken as a guarantee or warranty.
• The information is copyrighted by Ashland, with the latest revision in October 2019.

This formulation is optimized to provide a transparent, soft touch topcoat with excellent tactile properties, UV protection, and a smooth application suitable for brush or roller use.