The metallic soaps of naphthenic acids — Part 8

The preparation of tin naphthenate has been described in a U.S. patent specification, the product being applicable to the increasing of adhesion between polyorganosiloxanes coatings hardenable at 25°C, and as a hardener for polyorganosiloxane elastomers, and in the manufacture of polysiloxane resin. It can also be used to colour stabilize aluminium salts of ethyl hexanoic acid when used as a paint drier, and as a catalyst for the polymerising of vinyl chloride. Copolymers of vinyl monomers and butadiene have been stabilized against ageing and discolouration by the use of stannous naphthenate along with di‐tert‐butyl‐p‐cresol, and the same product has stabilized rubbers against colour deterioration. The use of stannous naphthenate as a catalyst for silicone water‐repellants can lead to a decrease in the amount of siloxane needed to obtain a high degree of water repellancy by textiles. The naphthenate has been utilized in transformer oils to prevent sludge deposition. Tributyltin naphthenate is useable as a fungicide in silicone sealing compounds, plastics, and paints. Inhalation tests with vapours of tributyltin naphthenate have shown no acute inhalation risks.