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Encor® 2181 latex

Encor® 2181 is a styrene acrylic emulsion polymer that provides an excellent balance of performance and value in clear sealers and topcoats for furniture and for use in interior wood coatings applications.

Features

  • Fast drying and hardness development. Figure 1 below details Persoz pendulum hardness performance.
  • Coatings based on Encor® 2181 latex display excellent resistance to water and hydrophilic stains. Figure 2 below details chemical resistance performance.
  • Produces films with high glass transition temperatures with excellent clarity and sanding properties.
  • Sealers formulated with Encor® 2181 latex display excellent sandability and recoatability performance.
  • Coatings display good film formation with fast-evaporating solvents with no permanent plasticizers.
  • Contributes warm aspect in coatings applied to wood.
Image: Kitchen with finished woodwork.
Image: For European Formulators

Typical physical properties1

Property Value
Polymer type Styrene acrylic
Freeze/thaw stability Stable
Solids content, % @105° C (ISO 3251) 43.5
pH (ISO 976) 8.5
Viscosity, Brookfield TVT, mPa.s (ISO 2555) 1000
MFFT, °C (ISO 2115) 52
Particle size, avg., nm (ISO 13321) 100

1 typical properties not to be construed as specifications.

Persoz pendulum hardness (Figure 1.)

   

Application of 100 µm on glass

2 h4 h6 h24 h2 d 7 d 21 d
Time 75100125160175185

Figure 2

Chemical resistance2 based on EN12720 standard

Chemical Time Rating
Water 16 hr. 5
Coffee 1 hr. 4
Ethanol (48%) 1 hr. 1

2Chemical resistance of clear topcoat based on Encor® 2181 latex.

Chemical Resistance Test Methodology

1. Spray application on pine at 100 g/m2

            + 5 min. at room temp.

            + 30 min. at 40°C

            + light sanding

2. Spray application at 100 g/m2

            + 5 min. at room temp.

            + 30 min. at 40°C

3. Evaluation after 21 days at 23°C, 50% RH

Guideline formulation

Waterbased clear topcoat for wood based on Encor® 2181 latex.

Ingredient Weight Volume
Encor® 2181 binder (Arkema) 670.47 650.94
Byk® 028 defoamer (Byk Chemie) 3.94 3.79
Water 210.20 210.20
Butylglycol coalescent 53.78 59.79
Dowanol® coalescent (Dow) 7.32 8.05
Aquaslip™ 677 wax emulsion (Lubrizol) 20.96 22.06
Crayvallac® WN-1875 matting agent (Arkema) 17.75 13.15
Ammonia (28%) neutralizing agent 1.27 1.38
Coapur™ 6050 associative thickener (PU) (Coatex) 14.31 13.76
Total 1000.00 983.08

 

Paint characteristics as formulated Value
 Density, g/cm3 1.02
 Solids, % by weight  33.20
 Solids, % by volume  31.31
 VOC, g/L, water included  62
 Application characteristics  
 Viscosity, seconds, #4 Ford cup @20°C  76
 pH  8.2
 Dry film characteristics  
 Solids Density, g/cm3  1.08

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