Coating processes – With post-treatment of coating or coating material – Chemical agent applied to treat coating
Patent
1997-12-22
1999-11-30
Dudash, Diana
Coating processes
With post-treatment of coating or coating material
Chemical agent applied to treat coating
427212, 427214, 427340, 4273855, B05D 136, B05D 302, B05D 724
Patent
active
059939079
ABSTRACT:
An improved process for forming a thin, durable coating of a perfluorosulfonated, salt- or acid-form ionomer on a selected substrate, which comprises contacting the substrate with an aqueous, surface active dispersion of the thermoplastic, sulfonyl fluoride precursor of the perfluorosulfonated, salt- or acid-form ionomer, contacting the dispersion-wetted substrate with a salt solution or a strongly ionizing acid solution of a sufficient ionic strength to cause a thin, adherent coating of the precursor particles in said dispersion to be formed on the substrate, then removing excess dispersion and excess salt or acid solution, annealing the coated substrate at an elevated temperature and thereafter converting the precursor to the desired acid or salt form ionomer.
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Dudash Diana
The Dow Chemical Company
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