Abstract: Superior protective coatings for corrosion susceptible substrates are provided by lower alkoxysilane-epoxy polymeric compounds produced by sol-gel polymerization and cross-linked by reaction with an aromatic diamine cross-linking agent such as a phenylenediamine.

Abstract: Superior protective coatings for corrosion susceptible substrates are provided by lower alkoxysilane-epoxy polymeric compounds produced by sol-gel polymerization and cross-linked by reaction with an aromatic diamine cross-linking agent such as a phenylenediamine.

Abstract: An air treating gel comprises an aqueous medium, at least one volatile air treating component and a gelling agent, characterized in that the gelling agent consists of the reaction product of a water soluble cellulose derivative and a metal salt.The invention also covers an apparatus for continuously producing the above air treating gel comprising a pair of containers holding the aqueous solution of said cellulose derivative and the slurry of said metal salt and said volatile air treating component respectively, mixing means connected to the containers for mixing and reacting the aqueous solution and slurry to form the gel, and transfer means for continuously transferring the aqueous solution and slurry in predetermined volume proportion from the containers to the mixing means.