摘要:
The present invention relates to a biuret-based quaternized polymer comprising a polymeric building block according to formula (I)
as well the corresponding biuret-based quaternized monomers and a method of synthesizing said biuret-based quaternized polymers from said biuret-based quaternized monomers, as well as metal or metal alloy plating baths comprising said polymers as additives and a method for deposition of a metal or metal alloy on a substrate.
摘要:
The present invention relates to a cyanide-free aqueous immersion-type plating bath for deposition of gold, comprising gold ions, at least one complexing agent, sulfite ions, thiosulfate ions, and at least one ureylene polymer additive. The gold layer deposited from the plating bath according to the present invention shows a lemon-yellow colour and a sufficient wettability for tin based solder materials.
摘要:
The present invention relates to aqueous plating bath compositions for deposition of nickel and nickel alloys utilizing novel stabilising agents possessing a carbon-carbon triple bond and a functional group to enhance the bath performance.