PVDF-acrylic hybrid

Keywords Service life prediction Chalk resistance Gloss retention Color retention PVDF Poly(vinylidene fluoride) Weathering Durability Accelerated weathering UV fluorescent cabinet Coatings Waterborne PVDF-acrylic hybrid Color fade Outdoor weathering... 

This paper outlines how this quantitative weathering model can be used, first to better understand the linkages between natural and accelerated testing and, second, to predict outdoor gloss and color retention, as well as chalk resistance, for waterborne coatings based on new PVDF-acrylic hybrid latex materials. A general methodology for this approach is depicted in Fig. 5.1. 

Using this approach, we developed a specific 70 30 PVDF-acrylic hybrid latex product that we predicted would have weathering performance in low-tanperature (50 °C) bake paints very close to that of commercial high-temperature baked solvent-borne PVDF systems formulated at a similar 70 30 resin weight ratio. We now have more than 10 years of Florida exposure data for coatings made with the PVDF-acrylic hybrid latex technology. As was predicted, these coatings show... 

Fig. 5.7 Florida gloss retention for waterborne masstone paints based on copolymer PVDF-acrylic (70 30 by weight) hybrids. Initial pigment volume concentrations in these coatings were about 20 %. The lack of chaUdng after 10 years exposure and the pattern of initial gloss loss, followed by a gloss plateau region, are consistent with what would be predicted by a 2-resin contraction model...

PVDF Copolymer/acrylic waterborne hybrid masstone paints with mixed metal oxide pigments Fla S45 gloss retention with 10-year chalk values also indicated (10 best)... 

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