M&t Chemicals, Inc.

Donald A Arcilesi

Otto Kardos

Silvester P Valayil

This invention relates to a method of producing lustrous to brilliant zinc electrodeposits, which comprises passing current from a zinc anode to a metal cathode for a time period sufficient to deposit a lustrous to brilliant zinc electrodeposit upon said cathode; the current passing through an aqueous acidic bath composition containing at least one zinc compound providing zinc cations for electroplating zinc, and containing as cooperating additives at least one bath soluble substituted or unsubstituted polyether, at least one aliphatic unsaturated acid containing an aromatic or heteroaromatic group and at least one aromatic nitrogen heterocyclic compound.

Acid zinc electroplating process and composition

This invention relates to a method of producing bright zinc electrodeposits over a wide current density range, which comprises passing current from a zinc anode to a metal cathode for a time period sufficient to deposit a bright zinc electrodeposit upon said cathode; the current passing through an aqueous acidic bath composition containing at least one zinc compound providing zinc cations for electroplating zinc such as zinc chloride, zinc fluoborate, zinc sulfamate and zinc sulfate; chloride, fluoborate, sulfamate and/or sulfate anions may be added as salts of bath compatible cations to provide better electrical conductivity, and containing as cooperating additives at least one bath soluble substituted or unsubstituted polyether, at least one aliphatic unsaturated acid containing an aromatic or heteroaromatic group and at least one aromatic or N-heteroaromatic aldehyde.

This invention relates to a method of producing lustrous to brilliant zinc electrodeposits, which comprises passing current from a zinc anode to a metal cathode for a time period sufficient to deposit a lustrous to brilliant zinc electrodeposit upon said cathode; the current passing through an aqueous acidic bath composition containing at least one zinc compound providing zinc cations for electroplating zinc, said zinc compound selected from the group consisting of zinc sulfate, zinc chloride and zinc sulfamate; chloride anions added as salts of bath compatible cations excepting ammonium; in the absence of complexing or chelating agents of organic nature; and containing as cooperating additives at least one alkyl propoxyethoxy polyether, at least one aromatic sulfonate emulsifying agent, and at least one aromatic carbonyl compound.

This invention relates to novel compositions and to a process for electrodepositing copper from an aqueous acidic copper plating bath containing at least one member independently selected from each of the following two groups:

Electrodeposition of copper

This invention relates to novel compositions and to a process for electrodepositing copper from an aqueous acidic copper plating bath containing at least one member independently selected from each of the following two groups: A. an aryl amine selected from those exhibiting the formulae: ##STR1## and its reaction product.sup.2 with propane sultone; ##STR2## wherein Z is selected from the group consisting of oxygen and --NCH.sub.2 --C.sub.6 H.sub.5 ; B. sulfoalkyl sulfide compounds containing the grouping --S--Alk--SO.sub.3 M where M is one gram-equivalent of a cation and --Alk-- is a divalent aliphatic hydrocarbon group of 1 to 8 carbon atoms.

This invention relates to a process and to novel compositions for electrodepositing copper from an aqueous acidic copper plating bath containing at least one member from each of the following two groups:

This invention relates to novel compositions and to a process for electrodepositing copper from an aqueous acidic copper plating bath containing at least one member independently selected from each of the following two groups: A. an aryl amine selected from those exhibiting the formulae: ##SPC1## B. sulfoalkyl sulfide compounds containing the grouping --S--Alk--SO.sub.3 M where M is one gram - equivalent of a cation and --Alk-- is a divalent aliphatic hydrocarbon group of 1 to 8 carbon atoms.

Growing community of inventors

Mount Clemens, MI, United States of America

Donald A Arcilesi