Solventless process for forming thin, durable coatings of perflu

Details Solventless process for forming thin, durable coatings of perflu Solventless process for forming thin, durable coatings of perflu

1996-04-01

1998-02-10

Cameron, Erma

Coating processes

Direct application of electrical, magnetic, wave, or...

Sonic or ultrasonic

427222, 427214, 427340, 427341, 427379, 4273935, 4274121, 4274123, 4274124, B05D 312, B06B 120

Patent

active

057166803

ABSTRACT:
A novel, improved process for forming a thin, adherent coating of a perfluorocarbon ionomer on a polymeric substrate which is typically in powdered form, fibrous form, or a mixture of powdered and fibrous forms, from a colloidal dispersion of the perfluorocarbon ionomer in a liquid medium which consists essentially of water and is substantially free of organic solvents, comprising adding a) the colloidal dispersion and b) a salt or a strongly ionizing acid to a vessel containing the polymeric substrate, and subjecting the dispersion, salt or acid and polymeric material to high shear conditions whereby a thin, durable coating of the perfluorocarbon ionomer is formed on the polymeric substrate.

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