D2486-17 Standard Test Methods for Scrub Resistance of Wall Paints . D3928-00a(2018) Standard Test Method for Evaluation of Gloss or Sheen Uniformity . D4400-18 Standard Test Method for Sag Resistance of Paints Using a Multinotch Applicator . D5146-10(2019) Standard Guide to Testing Solvent-Borne Architectural Coatings
Acrylic sheet is easy to fabricate, bonds well with adhesives and solvents, and is easy to thermoform. It has superior weathering properties compared to many other transparent plastics. Acrylic sheet exhibits glass-like qualities—clarity, brilliance, and transparency—but at half the weight and many times the impact resistance of glass.
UV-curable coatings exhibiting a high-density homogeneous distribution of micron-sized inorganic fillers filled with 40–60 nm nanoparticles such as zirconium dioxide, boehmite, and silicon dioxide can provide superior scratch resistance, better surface appearance, and superior chemical resistance coveted in many markets.
A UV-resistant clear coat is like a sunblock for automotive paints, containing organic and non-organic UV absorbers that form an invisible shield, preventing or reducing the amount of UV light penetrating the lacquer. It is always important to follow the manufacturer’s instructions on the number and thickness of lacquer coats to apply.
Proper surface preparation is required before painting to prevent chalking. The remedy is to utilize a topcoat with greater resistance to UV radiation. Quality paints may chalk mildly, but still keep a sound surface that does not crack and retains good moisture and weather resistance for many years. Chalking can be treated by:
IR and EB tend to be lumped together under the label “radiation cure.”. Coatings that are used outdoors are exposed to UV radiation from the sun, and real or simulated solar exposure is used to test such coatings. We include additives in some formulations, particularly for automotive topcoats, to provide UV resistance.
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is acrylic paint uv resistant
