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For over 20 years, Kynar Aquatec® PVDF latex resin-based coatings have offered a quantum improvement in topcoat gloss and color retention compared to coatings containing conventional acrylic and polyester resins.  Now specifiers of both protective and architectural restoration coatings systems can specify these field-applied coatings according to the SSPC Paint 47 standard.

Innovative Kynar Aquatec® emulsions are used by paint formulators to make truly premium weatherable water-based coatings. Coatings formulated with these emulsions can provide the durability and performance of traditional Kynar 500® PVDF resin based coatings. They can easily be applied to a variety of substrates, including metals, plastics, wood, concrete, textiles, and even some previously painted surfaces. Now, the extreme weatherability of a Kynar 500® PVDF resin based coating is available in an aqueous VOC-compliant, field or factory applied, ambient air-dry system. Additional benefits include tremendous resistance to dirt pick-up, outstanding water repellency, and high initial and long-term Total Solar Reflectance and Emissivity.SSPC Logo 4x3-crop400x191.png

Specifiers of both protective and architectural restoration coatings systems have expressed a need for an SSPC standard for field-applied fluoropolymer topcoats, particularly for bright and saturated colors.  In December 2020, the SSPC Paint 47 standard was released and now addresses that need.

Challenges in developing a new standard

A key challenge for the new standard was to identify a set of accelerated weathering test conditions, which would allow for the reliable qualification of fluoropolymer topcoat formulations much faster than the 10-50 year outdoor service life of the fluoropolymer paint.  the SSPC C.1.8 Fluoropolymer Topcoats Committee performed round robin testing to identify an accelerated weathering test cycle that cleanly differentiates between high performance fluoropolymertopcoats, and conventional non-fluoropolymer controls.

The SSPC C.1.8 committee identified accelerated test conditions that accurately differentiate, in six months, between high weatherability fluoropolymer formulations, and conventional SSPC Paint 36 and MPI 311 formulations.  They used the same performance criteria specified in the AAMA 2605 standard after a 10 year Florida exposure, a gloss retention >50%, color retention Delta E of < 5 units, and a chalk rating ≥ 8 (≥ 6 for whites).

Round Robin Conclusion: UVB-313 Method Offers a Rapid and Reliable Way to Differentiate High Performance Fluoropolymer Topcoats from Conventional Controls

Can use same performance criteria in the standard for 10-year Florida and accelerated testing:

  • % Gloss retention > 50%
  • Delta E* < 5
  • Chalking ≥ 8 (≥ 6 for whites)

Spearman rank correlation > 0.90 for differentiation of fluoropolymers vs. all Paint 36, MPI 311 controls, at 4000 hours UVB-313 cycle (with zero false positives)

 

Comparison of Popular North American Standards for Weatherable Top Coats and Finishes

Standard Reference Substrate Primary Application Conditions Years of Florida Weatherability Referenced in standard Color used for Florida Weatherabilty Color Fade Requirement for Non-whites? Referenced Resin Type
AAMA 2605 Aluminum Factory Bake 10 Any Yes None
MPI 311 / 315 Any Field-applied - - No Latex
SSPC Paint 36 Steel Field-applied 1-4 White or Off-white No 2-component polyurethane


SSPC Paint 47

 

Any

 

Any

10 years FL
or
4000 hrs UVB313

 

Any

 

Yes

 

Fluoropolymer

Now architects can specify high performance, field-applied fluoropolymer coatings for superior color and gloss retention with the same confidence as factory-applied coatings. It’s easy – just reference SSPC Paint 471.

Kynar 500® and Kynar Aquatec® are registered trademarks of Arkema.
1On January 1, 2021 the SSPC merged with NACE to form AMPP. Copies of the new standard are available in the AMPP Store at http://shop.sspc.org/ST-PAINT47