One-part organopolysiloxane rubber composition for use as a corrosion protectioncoating on metals

摘要

The present invention relates to a one-part room temperature vulcanizable organopolysiloxane rubber composition which crosslinks in the presence of moisture to form a coating for the corrosion protection of metals. The one-part organopolysiloxane rubber composition comprises the product which is obtained by mixing the following: a) about 20 to 50 weight percent of polydimethyl siloxane fluid of the formula: HO[(CH3)2SiO]nH, in which n has an average value such that the viscosity is in the range from 1 to 100 Pa.S at 25 DEG C, preferably from 10 to 20 Pa.S at 25 DEG C; b) about 20 to 50 weight percent of a mixture of anorphorous and crystalline SiO2 reinforcing fillers having a surface area of up to 200 m2/g and a specific gravity of 2.2; c) about 2 to 6 weight percent of an oximino silane; d) about 0.25 to 2 weight percent of an organo functional silane; e) about 0.05 to 1 weight percent of an organotin sa and f) about 10 to 40 weight percent of an organic solvent as a dispersion medium for the above composition.