C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
150/4
C09K 11/06 (2006.01) C09B 67/42 (2006.01) G01N 19/08 (2006.01) G01N 21/01 (2006.01) G01N 21/91 (2006.01)
Patent
CA 1045529
ABSTRACT OF THE DISCLOSURE Biodegradable water washable dye penetrant composition in the form of a gel for use in non-destructive dye penetrant inspec- tion of parts, and which can be applied to part surfaces at varying angles without dripping, and being resistant to decomposition and liquefaction when applied to heated surfaces, e.g. up to about 300°F such composition consisting essentially of (1) an organic dye, pre- ferably a fluorescent dye, (2) a carrier or solvent for said dye, in the form of a surfactant comprised of certain straight chain, primary, aliphatic oxyalkylated alcohols, and (3) silica, particularly fumed silica, such silica employed e.g. in a propor- tion of 5 parts per 1 part of the sum of the other dye penetrant components, including biodegradable surfactant and dye, by volume. The biodegradable heat resistant dye penetrant composition of the invention is a simple formulation which does not require the use of mixtures of conventional solvents and wetting agents and which avoids liquefaction and dripping and also avoids the genera- tion of obnoxious fumes, as distinct from prior art compositions.
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