Method of thread masking and thread masked part

B - Operations – Transporting – 05 – D

Patent

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B05D 1/32 (2006.01) B05D 5/00 (2006.01) B05D 7/22 (2006.01) C25D 13/22 (2006.01) F16B 33/06 (2006.01) F16B 37/00 (2006.01) B05D 3/02 (2006.01)

Patent

CA 1328379

ABSTRACT A method of masking the threaded portion of a threaded fastener part to prevent adhesion of coatings comprising the steps of applying a film of a heat activated foaming polymeric material to the threaded portion of a threaded part prior to exposing the threads to a coating and heating the foaming material subsequent to the application of a coating thereto. The foaming material comprises a plastisol, preferably including a vinyl compound, which most preferably is polyvinyl chloride. The foaming material further comprises a blowing agent, preferably azodicarbonamide.

603565

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