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ENCOR® 601 acrylic latex

ENCOR® 601 acrylic latex delivers excellent resistance to surfactant leaching in masonry coatings.

The acrylic binder is optimized to help formulators achieve high levels of resistance to surfactant leaching in interior and exterior masonry coatings. The binder delivers excellent performance in deep tint base formulations, where surfactant leaching is most problematic.

 

ENCOR® 601 acrylic latex can be used to formulate low VOC (<50g/l) coatings.

Performance benefits

  • Allows formulation of low VOC coatings with excellent resistance to surfactant leaching
  • Displays strong block resistance, hardness and film toughness
  • Excellent performance in deep tint base formulations
  • Very good scrub, efflorescence and alkali resistance
  • Outstanding adhesion in wet or dry application conditions

Typical properties1

Property Typical value
Total solids, % 52
Weight per gallon, lbs. 8.8
pH 8.5
Viscosity, cps <800
Particle size, µm 0.15
MFFT, °C 16

 

¹The data provided for these properties are typical values, intended only as guides, and should not be construed as sales specifications.

 

Surfactant leaching resistance

Low VOC coatings formulated with common acrylic latexes are prone to surfactant staining when applied to exterior buildings. Paint application in low temperature / high humidity environmental conditions tends to promote surfactant leaching.

 

Staining comes from leachate that migrates outward from an applied coating system to a wet environment. Leachates include a wide variety of hydrophilic materials found in a fully formulated coating:

  • Surfactants and dispersants: alcohol ethoxylates, polyethylene glycols
  • Excess salts
  • Biocide and fungicides

 

Because colorant pigment dispersions contain concentrated amounts of surfactants, deep tinted paints are more susceptible to surfactant leaching than white or light color paints. To reduce leaching potential of coatings:

  • Focus on reducing all free hydrophilic species in end formulation – not as

          simple as reducing surfactant usage in latex

  • Latex composition and morphology and structure must enable optimum film formation

 

Testing to assess surfactant leaching

Water droplet test

  • Described in ASTM D7190-10: Standard Practice to Evaluate Leaching of

          Water-Soluble Materials from Latex Paint Films

  • Place water droplets on paint film drawdown at various stages of drying
  • Allow the water to stand for 10 minutes, then tilt up the test panel to allow the

          water to run-off

  • Once dry, evaluate the runoff area for visible streaking defect

 

Exudate extraction test

  • Drawdown test panel is prepared and the weight of dry coating film is

          determined prior to testing

  • There are several ways to force the exudation. One variation is to submerge

          a pre-weighed coated test panel in water for 1 hour

  • Test panel is removed and allowed to dry
  • Test panel is re-weighed to determine % leachate extracted from the film

Film performance

The information that follows details the performance of ENCOR® 601 acrylic latex in a variety of formulations, compared with similar binders. Figure 1 is a legend that describes the various latex binders included in the testing.

Figure 1

Binder MFFT °C % Solids
ENCOR® 601 16 52
Masonry Acrylic 1 16 58
Masonry Acrylic 2 12 58
Gloss Acrylic 1 <5 49
Gloss Acrylic 2 24 45
Gloss Acrylic 3 <5 45

ENCOR® 601 acrylic latex performance: satin deep base

  • Satin deep base formulation
  • Tinted with individual low-VOC colorants at 12 fl oz/gal

ENCOR® 601 acrylic latex performance: satin mid base - brown tint

ENCOR® 601 acrylic latex also offers excellent potential for block resistance, scrub resistance and efflorescence resistance.

ENCOR® 601 acrylic latex performance: gloss white

ENCOR® 601 acrylic latex may also be formulated in semi-gloss to high gloss coatings and maintain excellent performance balance for block resistance and surfactant leaching.

ENCOR® 601 acrylic latex performance: semi-gloss deep base

ENCOR® 601 acrylic latex matches performance of acrylic binder technology engineered for deep tint hardness and block resistance while offering greatly improved surfactant leaching and water resistance.

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