Electrolytic deposition of zinc

Claim 2

AN AQUEOUS ZINCATE BATH HAVING A PH OF ABOUT 12 AND ABOVE FOR ELECTROPLATING BRIGHT METALLIC ZINC DEPOSITS ON SUBSTRATES OVER A WIDE CURRENT DENSITY RANGE WHICH COMPRISES

Claim 3

AN AQUEOUS ALKALINE SOLUTION CONTAINING LESS THAN ABOUT 2 OZ./GAL/ OF CYANIDE;

Claim 4

AN AQUEOUS ALKALINE SOLUTION CONTAINING LESS THAN ABOUT 2 OZ./GAL/ OF CYANIDE;

Claim 5

A SOLUBLE ZINC COMPOUND DISSOLVED THEREIN AND CAPABLE OF PLATING ZINC METAL BY ELECTROLYTIC DEPOSITION;

Claim 6

A SOLUBLE ZINC COMPOUND DISSOLVED THEREIN AND CAPABLE OF PLATING ZINC METAL BY ELECTROLYTIC DEPOSITION;

Claim 7

a soluble zinc compound dissolved therein and capable of plating zinc metal by electrolytic deposition;

Claim 8

a soluble zinc compound dissolved therein and capable of plating zinc metal by electrolytic deposition;

Claim 9

The bath of claim 1 wherein the substituted pyridine compound is the reaction product of an epoxide and a substituted pyridine, said reaction product being produced by reacting the epoxide and a substitUted pyridine for a sufficient length of time and in a molar ratio sufficient to form the reaction product which is soluble in the aqueous zincate bath.

Claim 10

a soluble zinc compound dissolved therein and capable of plating zinc metal by electrolytic deposition;

Claim 11

a soluble zinc compound dissolved therein and capable of plating zinc metal by electrolytic deposition;

Claim 12

a substituted pyridine or quinoline compound possessing at least one amino substituent in an amount sufficient to increase the brightness of the zinc deposit electrolytically deposited therefrom over an increased current density range; and

Claim 13

a substituted pyridine or quinoline compound possessing at least one amino substituent in an amount sufficient to increase the brightness of the zinc deposit electrolytically deposited therefrom over an increased current density range; and

Claim 14

The bath of claim 2 wherein the substituted pyridine reacted is 2-aminopyridine or 3-aminopyridine and the epoxide is epichlorohydrin.

Claim 15

a substituted pyridine or quinoline compound possessing at least one amino substituent in an amount sufficient to increase the brightness of the zinc deposit electrolytically deposited therefrom over an increased current density range; and

Claim 16

a substituted pyridine or quinoline compound possessing at least one amino substituent in an amount sufficient to increase the brightness of the zinc deposit electrolytically deposited therefrom over an increased current density range; and

Claim 17

A SUBSTITUTED PYRIDINE OR QUINOLINE COMPOUND POSSESSING AT LEAST ONE AMINO SUBSTITUENT IN AN AMOUNT SUFFICIENT TO INCREASE THE BRIGHTNESS OF THE ZINC DEPOSIT ELECTROLYTICALLY DEPOSITED THEREFROM OVER AN INCREASED CURRENT DENSITY RANGE; AND

Claim 18

A SUBSTITUTED PYRIDINE OR QUINOLINE COMPOUND POSSESSING AT LEAST ONE AMINO SUBSTITUENT IN AN AMOUNT SUFFICIENT TO INCREASE THE BRIGHTNESS OF THE ZINC DEPOSIT ELECTROLYTICALLY DEPOSITED THEREFROM OVER AN INCREASED CURRENT DENSITY RANGE; AND

Claim 19

AN AMINE BRIGHTENING AGENT OTHER THAN THE AMINO SUBSTITUTED PYRIDINE OR QUINOLINE COMPOUND IN SUFFICIENT AMOUMT TO INCREASE THE BRIGHTNESS OF THE ENTIRE DEPOSIT

Claim 20

AN AMINE BRIGHTENING AGENT OTHER THAN THE AMINO SUBSTITUTED PYRIDINE OR QUINOLINE COMPOUND IN SUFFICIENT AMOUMT TO INCREASE THE BRIGHTNESS OF THE ENTIRE DEPOSIT

Claim 21

The bath of claim 1 wherein the amino-pyridine is 2-aminopyridine or 3-aminopyridine.

Claim 22

an amine brightening agent other than the amino substituted pyridine or quinoline compound in sufficient amount to increase the brightness of the entire deposit.

Claim 23

an amine brightening agent other than the amino substituted pyridine or quinoline compound in sufficient amount to increase the brightness of the entire deposit.

Claim 24

an amine brightening agent other than the amino substituted pyridine or quinoline compound in sufficient amount to increase the brightness of the entire deposit.

Claim 25

an amine brightening agent other than the amino substituted pyridine or quinoline compound in sufficient amount to increase the brightness of the entire deposit.

Claim 26

An aqueous zincate bath according to claim 1 in which the amine brightening agent is a water soluble reaction product of an amine and an epihalohydrin or an amine and a polyepihalohydrin containing repeating amino groups and having a molecular weight above about 250, said reaction between the amine and the epihalohydrin and the amine and the polyepihalohydrin being carried out for a sufficient length of time, and said reactants being present in such a molar ratio so as to produce a polycondensate having repeating amino groups and having a molecular weight above about 250, but below that which would render the polymer insoluble in the alkylene zincate bath.