Accession Number : AD0164346
Title : Process for Nondestructive Inspection.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C
Personal Author(s) : Allinikov,Sidney
Report Date : 17 OCT 1972
Pagination or Media Count : 5
Abstract : This invention is useful in that it permits the detection of weakly bonded or nonbonded portions of laminated articles. A substituted 1,3,3-trimethylindolinobenzopyrylospiran is mixed with an organic-soluble, resin base paint and applied to the surface of a laminated article. The coating is then activated by ultraviolet light which causes a color change. Upon heating, any portion of the coating directly over a weakly bonded or nonbonded portion of the laminated article will return to its original colorless or white state.
Descriptors : *Patents, *Laminates, *Nondestructive testing, Spiro compounds, Defects(Materials), Detection, Inspection, Dyes, Oxygen heterocyclic compounds, Nitrogen heterocyclic compounds, Paints, Synthesis(Chemistry), Ultraviolet radiation
Subject Categories : Organic Chemistry
Test Facilities, Equipment and Methods
Distribution Statement : APPROVED FOR PUBLIC RELEASE