Zinc and zinc alloy electroplating additives and...

Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing

Reexamination Certificate

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C564S026000, C564S032000, C564S047000, C106S001290, C205S244000, C205S305000, C205S311000, C205S312000, C205S313000, C205S314000

Reexamination Certificate



An additive for an alkaline zinc or zinc alloy electroplating bath medium, the additive comprising a random co-polymer comprising the reaction product of: (i) one or more di-tertiary amines including an amide or thioamide functional group, and (ii) optionally, one or more saturated second di-tertiary amines and/or one or more second di-tertiary amines including an unsaturated moiety, with (iii) one or more saturated or unsaturated linking agents capable of reacting with said di-tertiary amines (i) and (ii), provided that, where all the linking agents are saturated, an unsaturated di-tertiary amine must he present. Preferably, the polymer has the general formula n(2x+2y+zEp)j-.

patent: 4717458 (1988-01-01), Martin et al.
patent: 5405523 (1995-04-01), Eckles
patent: 5435898 (1995-07-01), Commander et al.
patent: 5569724 (1996-10-01), Hendricks et al.
patent: WO 9931301 (1999-06-01), None
patent: WO 00/50669 (2000-08-01), None
References A-C were cited on the International Search Report.


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