Ambient temperature self-crosslinking acrylic latexes were prepared through semicontinuous emulsion polymerization using 3 different polymerizable alkoxysilanes

i.e. vinyltri(β-methoxy ethoxy)silane (A172)

vinyl-triethoxysilane (VTES) and γ-methacryloxypropyltrimethoxysilane (A174).The hydrolysis of these siloxanes under different pH was characterized

and dependence of the latex and polymer properties on these siloxanes and their incorporated amounts in the polymers was studied.Results revealed that the lowest hydrolysis was observed around neutral pH between 7 and 9.A172 was more quickly hydrolyzed at all tested pH

and its hydrolysis was fully accomplished within 5 h at pH 8.4.Polymer crosslinking

mechanical performance and water resistance of the final polymers were significantly enhanced with incorporation of VTES and A174.The hydrolysis can be controlled through pH adjustments during emulsion polymerization and film formation so that to reduce the hydrolysis during emulsion polymerization and to enhance it when film being formed

which entrained higher crosslinking in the final polymer films.It was found that acidic pH was more preferable compared to alkali pH although in both cases films performances were improved when compared with films cast without pH adjustment under neutral pH.This pH adjustment effect was more pronounced in latexes prepared with VTES than in those done with A174.