Predicting the exterior durability of new fluoropolymer coatings

Commercial coatings based on polyvinylidene fluoride (PVDF)/acrylic blends typically show minimal gloss loss or bulk chemical change even after many months of Florida or accelerated weathering testing. Because of this excellent weathering, better short term tests are needed to predict long term weat...

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Bibliographic Details
Published inJournal of fluorine chemistry Vol. 104; no. 1; pp. 63 - 71
Main Authors Wood, Kurt A., Cypcar, Christopher, Hedhli, Lotfi
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.06.2000
Subjects
Coatings
Degradation
Exterior durability
Fluoropolymer
QUV-B
Weight loss
Degradation
QUV-B
Exterior durability
Fluoropolymer
Coatings
Weight loss
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Summary:Commercial coatings based on polyvinylidene fluoride (PVDF)/acrylic blends typically show minimal gloss loss or bulk chemical change even after many months of Florida or accelerated weathering testing. Because of this excellent weathering, better short term tests are needed to predict long term weatherability. We have recently found dramatic differences in the steady state weight loss rate for different fluoropolymer/acrylic coatings in a ‘QUV-B’ unit. For clear coats, steady state weight loss rates can be measured long before the coatings begin to lose gloss. Studies are now underway to understand the microscopic basis for these differences. For new fluoropolymer/acrylic blend compositions, the weight loss rate can be used as an early predictor of the blend’s weatherability.
ISSN:0022-1139
1873-3328
DOI:10.1016/S0022-1139(00)00228-1