Abstract: A water-based, two-part primer for metal substrates includes at least a first and second part, combined in a ratio of about 1:1. The first part of the primer may be substantially free of volatile organic compounds and include a colloidal silica present in the amount of about 20 weight percent to about 80 weight percent, based on the total weight of the first part; a silane coupling agent selected from the group consisting of epoxysilanes, mercaptosilanes, and modified silanes having a functional group active to an epoxy group, the silane coupling agent present in the amount of about 0.05 weight percent to about 15 weight percent based on the weight of the first part; and a cellulose ether in the amount of about 0.1 weight percent to about 2 weight percent. The second part may include from about 50% by weight zinc powder. The primer may be conventionally sprayable for use in large ship-building operations.

Abstract: The present invention relates to coating compositions formed by combining two latex resins: a base latex resin and a stratifying latex resin. The stratifying latex resin comprises at least one “driver” to promote migration of the stratifying latex to the surface of the coating during curing or drying. Drivers may be selected from one or more of fluorine containing monomers incorporated into the stratifying latex, long chain acrylate monomers, such as lauryl methacrylate, wax, small particle size, or relatively low Tg.

Abstract: An aqueous multi-component epoxy coating composition having less than 3% by weight of VOCs and curable upon admixing the components comprises (a) a first component of (i) a stable epoxy dispersion of an epoxy resin, from 5 to 20 weight percent of a mixture of surfactants comprising a low temperature nonionic surfactant having a molecular weight of from 1,000 to 7,000; a high temperature nonionic surfactant having a molecular weight of greater than 7,000 to 20,000 and an anionic surfactant, and (b) a second component of (i) a water miscible polyamine, wherein the composition further contains an associative thickener as well as thixotropic clay and/or a cellulosic thickener as additional thickener(s).