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AssigneesUab “Rekin International”, State Research Institute Center for Physical Sciences and Technology, Mark Hyman
InventorsMark Hyman, Leonas Narus̆kevic̆ius, Danas Budilovskis
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Provided are chrome-free adhesion pretreatment processes for use on a variety of reinforced or unreinforced plastics and polymers, such as polyimides, polyetherimides and polyvinylchloride. The pretreatment process can be performed in a combination of two sequential operations, which includes treating with a first solution containing nitric acid and subsequently treating with a second solution that includes sulfuric acid and periodate ions. Alternatively, the pretreatment process can be performed by treatment with a single combined composition that includes nitric acid, sulfuric acid, and periodate ions. The pretreatment processes, either done in two separate solutions, sequentially, or in one combined solution, produce an adherent surface for further metallization of the article, with adhesional values of the metal layer higher than those achieved using conventional chromic acid pretreatment processes.
A method of pretreating a 30% glass fibers filled polyetherimide substrate for metallization, the method comprising:
A method of metallizing a surface of a plastic or polymer article, the method comprising:
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