COATING COMPOSITION FOR LEAK DETECTION IN AIR TEST

摘要

A coating composition for leak detection in an air test, consists of an aqueous solution containing from 1.6 to 9.6 wt% of soluble starch, from 0.04 to 0.75 wt% of water-soluble acrylic resin, from 0.05 to 0.5 wt% of gelatin, and from 0.5 to 1.0 wt% of a foaming agent, and is adjusted to a pH range between 4 and 10. The composition may be adjusted to a pH range between 4 and 6. It may also be an aqueous solution containing a coagulation modifier, with the pH adjusted to a range between 8 and 10 with the addition of a small amount of caustic alkali.