Prevention of particle redeposition onto organic surfaces

Details Prevention of particle redeposition onto organic surfaces Prevention of particle redeposition onto organic surfaces

B - Operations, Transporting

05

D

B05D 7/24 (2006.01) B05D 1/38 (2006.01) B05D 3/08 (2006.01) B05D 5/00 (2006.01) C09D 185/02 (2006.01) C09D 193/00 (2006.01) B05D 1/18 (2006.01) B05D 3/12 (2006.01)

Patent

CA 2400090

Method for preventing the formation of coating defects in polymeric coated surfaces in a coating process comprising a plurality of steps that occur prior to the polymeric coating of said surfaces and that contact organic and metal surfaces with a plurality of aqueous compositions in which accumulate in suspension resin particles released from said metal surfaces. Suspended resin particles are prevented from re-depositing on the organic surfaces by converting said surfaces to hydrophilic character by means of oxidizing said surfaces prior to contacting the oxidized surfaces with said suspensions.

La présente invention concerne un procédé permettant d'empêcher la formation d'anomalies de revêtement dans des surfaces à revêtement polymère, dans le cadre d'un processus de revêtement comprenant plusieurs étapes qui sont réalisées avant le revêtement polymère desdites surfaces et qui mettent en contact des surfaces organiques et métalliques avec plusieurs compositions aqueuses dans lesquelles s'accumulent en suspension des particules de résine issues desdites surfaces métalliques. La transformation des surfaces organiques en surfaces à caractère hydrophile, par oxydation desdites surfaces avant mise en contact des surfaces oxydées avec les suspensions, permet d'empêcher les particules de résine en suspension de se re-déposer sur les surfaces organiques.

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