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Afcona 3238 is a liquid additive serving as a slip and leveling agent with excellent defoaming effects. Specifically designed for coil coatings, gelcoats, and high-solids coatings, it offers anti-cratering properties and good compatibility with epoxies and polyurethanes. This polysiloxane-based product ensures smooth application via airless spray and curtain coating methods. It caters to various markets, including automotive, marine, flooring, wood, and industrial coatings, providing versatility in both solvent-based and solventless formulations.

Chemical Family: Polysiloxane, Organomodified

Compatible Polymers & Resins: Epoxies (EP), Polyurethanes (PU)

Features: Anti-Cratering , Defoaming, Good Compatibility

End Uses: Coil Coating, Gelcoat, Radiation Curable Coating, Solventborne Coating, Solventless & High Solids Coating, Wood Coating

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

CASE Ingredients Functions
Technologies
Chemical Composition

Organically modified polyalkyl polysiloxane.

Features & Benefits

Applications & Uses

Compatible Polymers & Resins
Compatible Substrates & Surfaces
Cure Method
Incorporation

AFCONA-3238 can be added at any stage of production process. However, high shear force is needed if added in letdown stage due to the defoaming property. For easier incorporation, dilute to 10% in any solvent/s..

Addition and Dosage

0.05 – 0.50% on total formulation. In general under normal conditions, the dosage is 0.05 – 0.2% based on total formulation.

Properties

Physical Form
Appearance
Transparent To Slightly Yellowish Liquid
Typical Properties
ValueUnitsTest Method / Conditions
Active Ingredientmin. 95%
Denisty (at 20°C)0.91 - 0.94g/cm³
Colormax. 3
Refractive Index1.427 - 1.437
Flash Pointmin. 100°C
Product Properties

AFCONA-3238 is another grade of alkyl modified polysiloxane from AFCONA. The % of alkyl modification in AFCONA – 3238 is in between AFCONA – 3236 and AFCONA – 3239.
The different properties of AFCONA – 3238 from the other grades of alkyl modified silicones from AFCONA are:

  • AFCONA – 3238 is better in slip
  • AFCONA – 3238 is better compatibilitythan AFCONA – 3236
  • AFCONA – 3238 is better in defoamingthan AFCONA – 3239.

AFCONA-3238 mostly recommended in foam sensitive systems as listed below due to none foam stabilizing property:

  1. Solvent –less epoxies
  2. High Solid or solvent-less polyurethanes
  3. Paints applied by Curtain coater
  4. Paints applied by airless spray application
  5. UV curing systems For matted finish coatings, addition of AFCONA – 3238 will help in matting agent orientation. In UV curing systems, it even further reduces gloss when added together with a matting agent.

Packaging & Availability

Packaging Information

25kg and 180kg non-returnable containers

Storage & Handling

Shelf Life
5 years
Storage Condition

AFCONA-3238 should be stored in a cool dry place. When kept in an original unopened container, it will keep up to 5 years from the date of manufacture. The expiry date is indicated on the container.