PENETRANT FOR METALLIC ARTICLE LUMINESCENT DEFECTOSCOPY Russian patent published in 1997 - IPC

FIELD: luminescent materials. SUBSTANCE: penetrant has 4-methyl-7-diethylaminocoumarin, N-methylpyrrolidone, kerosene, dibutylphthalate, luminophore-acceptor and wetting agent. Luminophore-acceptor is 4-methoxypropylaminonaphthalic acid N-methoxypropylimide and wetting agent is a mixture of polyethylene glycol C₈-C₁₀-monoalkylphenyl esters at the following ratio of components, wt.-%: 4-methoxypropylaminonaphthalic acid N-methoxypropylimide 1.5-2.0; 4-methyl-7-diethylaminocoumarin 0.3-0.8; mixture of polyethylene glycol C₈-C₁₀-monoalkylphenyl esters 4.5-5.5; N-methylpyrrolidone 42-50; kerosene 6-8, and dibutylphthalate - the rest. EFFECT: enhanced sensitivity and safety of defect detection.