Stabilizers in automotive coatings under acid attack |
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Authors: | Ulrich Schulz Kirsten Jansen Adalbert Braig |
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Institution: | 1. Federal Institute for Materials Research and Testing, D 12200 Berlin, Germany;2. CIBA SC, CH 4002 Basel, Switzerland |
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Abstract: | To examine the action of acid atmospheric precipitation on the light stabilisers in automotive coatings two common clearcoat types (TSA and 2K-PU) blended with commercially available HALS and UVA were subjected to artificial weathering (Acid Dew and Fog test and Acid-free weathering test) and natural weathering outdoors in Jacksonville, FL. Tracing gloss and haze during weathering the test results showed that the influence of acid stress on the long-term performance of the clearcoats depended on the kind of the stabilisation system. |
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Keywords: | coatings ageing stabilisation HALS gloss acid resistance |
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