Titanium dioxide nanoparticles (TiO2 NPs) are promising in preparation of self-cleaning coatings [1].Nevertheless, the TiO2-based coatings easily cause the decomposition of organic component [2].When they are cast on organic substrates, a protective interlay layer between TiO2-based coatings and the organic substrate is always employed [3], which complicates the application technique of self-cleaning coatings.Herein, self-cleaning coatings were prepared based on an aqueous TiO2 dispersion and a hybrid binder (TM82) that was synthesized from tetraethoxylsilane and methyl trimethoxysilane via a sol-gel process.All self-cleaning coatings with various TiO2 contents were transparent and can be directly applied on architecture latex coatings.The coatings were exposed outdoors for 1 year.All TiO2-based coatings displayed better self-cleaning performance compared with bare latex coatings (Fig.1).In addition, the TiO2-based coatings were deposited on high gloss blue latex coatings and further carried out accelerated weathering testing.The gloss and color change of coatings were monitored.After 1800 h of accelerated weathering testing, the coatings with top self-cleaning layer possess higher gloss retention and smaller color change compared with bare latex coatings.The cross section SEM images indicated that the degradation of latex coatings beneath could not be observed until TiO2 content in self-cleaning coatings beyond 45 wt% (Fig.2).The non-degradation of latex coatings could be due to the hydrophobicity of the hybrid binder.It assured the preferential occupation of the binder at the interface and thus the isolation of YiO2 NPs from the latex coatings beneath.