Process for anion removal from orthophosphate coatings

Details Process for anion removal from orthophosphate coatings Process for anion removal from orthophosphate coatings

B - Operations, Transporting

05

D

117/99

B05D 3/10 (2006.01) C08J 7/04 (2006.01)

Patent

CA 1057140

Title Process for Anion Removal from Orthophosphate Coatings ABSTRACT OF THE DISCLOSURE The process of coating an organic polymeric shaped article with aluminum orthophosphate, using an anion com- pound as a source of aluminum, and topcoating with a polymer is further improved to enhance barrier properties under moist conditions. The aluminum orthophosphate coating is dried to effect no more than a partial cure and the anion concentra- tion is reduced below about 1% of the weight of the solids content of the coating prior to completing the cure. The top- coating may be applied prior to completing the cure and then dried at a temperature to effect a substantially complete cure of the aluminum orthophosphate. - 1 -

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