Process for the production of multi-layer coatings...

Details Process for the production of multi-layer coatings... Process for the production of multi-layer coatings...

2007-01-23

2007-01-23

Fletcher, III, William Phillip (Department: 1762)

Coating processes

Applying superposed diverse coating or coating a coated base

Synthetic resin coating

C427S384000, C427S388100

Reexamination Certificate

active

10842218

ABSTRACT:
A process for producing multi-layer coatings comprising a waterborne primer-surfacer layer and a topcoat applied thereto on substrates, in which a waterborne primer-surfacer layer is applied from a waterborne primer-surfacer to substrates and baked and then a topcoat is applied, wherein the waterborne primer-surfacer has a binder solids content with a hydroxyl number of 100 to 250 mg KOH/g and contains free or blocked polyisocyanate as a curing agent (crosslinking agent) for the hydroxy-functional binder(s) in a molar ratio of OH/NCO of more than 2:1 to 5:1, and wherein, after it has been applied and before baking, the waterborne primer-surfacer layer is allowed to evaporate for 30 to 300 seconds at 15 to 40° C.

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The International Search Report and Written Opinion of the International Searching Authority, Application No. PCT/US2005/015273, Mailed: Nov. 21, 2005.

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