Development of UV-resistant Topcoat for External Walls of Buildings
An anti-ageing topcoat was developed,not only shielding UV radiation but also facilitating application,offering superior efficiency and versatility.Experimental results demonstrate that the topcoat developed exhibits excellent ageing resistance,with significantly improved overall ageing resistance.The UV absorption spectrum shows that UV-7751W displays a broader response range in the UV spectrum compared with DW-123(N),indicating superior UV ageing resistance.Additionally,if mixed with UV absorber,it exhibits better performance,while other fundamental coatings properties such as stain resistance(＜10%)and scrub resistance(＞10 000 cycles)far exceed industry standards.This is essential for maintaining buildings'cleanliness and natural appearance over the long term,extending the renovation cycle of buildings,and conserving natural resources,thus aligning with the requirements of the new era.
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