Preparation of waterborne silane/titanium chelates composition

摘要

A stable aqueous solution of a silane/titanium chelate is prepared by (a) forming a mixture in alcoholic solution of bis-hydroxyethylaminopropyltriethoxysilane and a titanium chelate selected from the group consisting of titanium acetylacetonate, triethanolamine titanate and butyltitanate monomer; (b) adding water to the mixture of step (a) in a quantity sufficient to effect the hydrolysis of the silane; (c) completing the silane hydrolysis reaction; and (d) removing the alcohol from the solution. The end product can be diluted further with water to provide a commercial formulation that is substantially free of VOC and has a shelf like of at least six months. The aqueous solution of the silane/titanium chelate can also include an organofunctional silane.