Compositions – Nonreactive analytical – testing – or indicating compositions
Patent
1993-10-04
1995-02-14
Lovering, Richard D.
Compositions
Nonreactive analytical, testing, or indicating compositions
252700, 436 3, 436 5, 436904, C09K 1107
Patent
active
053893026
ABSTRACT:
A chemiluminescent dye penetrant composition is provided for detecting cracks and other defects in the surface of an object, which comprises a carrier, preferably in the form of a nonionic surfactant, a small amount of a fluorescent dye soluble in the surfactant and a minor amount of hydrogen peroxide. The dye penetrant is applied to the surface of the object and excess dye penetrant is removed therefrom. An oxalate ester or oxalate amide is then applied to the treated surface and reacts with the dye penetrant in the cracks and defects to luminesce, and produces self illuminated penetrant indications at the location of the cracks and defects. Oxalate esters such as bis(2,4,6 trichlorophenyl) oxalate are preferred. The oxalate ester or oxalate amide can be mixed with inert conventional developer materials such as talc or fumed silica.
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Fee Valerie D.
Geldin Max
Lovering Richard D.
Rockwell International Corporation
Silberberg Charles T.
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