(N-Substituted-pyridyl)-alkyl sulfonic acid betaines as electroplating additives
AssigneeCilag-Chemie A.G.
InventorsKurt Pluss, Bruno Romano De Martin
Life of this patent
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Abstract
Novel pyridyl alkyl sulfonic acid betaines useful as additives to nickel electroplating baths.
Claims16
A pyridyl alkyl sulfonic acid betaine having the formula:
- ##STR18## in which the substituent --(CH.sub.2).sub.n SO.sub.3.sup..crclbar. is in the 2- or 4-position of the pyridyl ring;
- n is the integer 1 or 2;
- and R is a member selected from the group consisting of methyl;
- methallyl;
- benzyl;
- halobenzyl wherein said halo has an atomic weight less than 80;
- loweralkylbenzyl wherein said loweralkyl has from 1 to 4 carbons;
- and benzyl substituted with the group:
- ##STR19## wherein the substituent --(CH.sub.2).sub.n SO.sub.3.sup..crclbar. is in the 2- or 4-position of the pyridyl ring and n is the integer 1 or 2.
2-[N-methyl-pyridyl-(2)]-ethanesulfonic acid betaine.
2-[N-(2-methylbenzyl)-pyridyl-(2)]-ethanesulfonic acid betaine.
2-[N-(2-methylbenzyl)-pyridyl-(4)]-ethanesulfonic acid betaine.
[N-benzylpyridyl-(2)]methanesulfonic acid betaine.
2-[N-benzylpyridyl-(2)]-ethanesulfonic acid betaine.
2-[N-benzylpyridyl-(4)]-ethanesulfonic acid betaine.
2-[N-(2-chlorobenzyl)-pyridyl-(2)]-ethanesulfonic acid betaine.
2-[N-(4-chlorobenzyl)-pyridyl-(2)]-ethanesulfonic acid betaine.
2-[N-(2-chlorobenzyl)-pyridyl-(4)]-ethanesulfonic acid betaine.
1,4-Bis-[2-(2-sulfoethyl)-pyridinium-(1)-methyl]-benzene.
1,2-bis-[2-(2-sulfoethyl)-pyridinium-(1)-methyl]-benzene.
1,3-bis-[2-(2-sulfoethyl)-pyridinium-(1)-methyl]-benzene.
1,4-bis-[4-(2-sulfoethyl)-pyridinium-(1)-methyl]-benzene.
2-[N-methallyl-pyridyl-(2)]-ethanesulfonic acid betaine.
2-[N-methallyl-pyridyl-(4)]-ethanesulfonic acid betaine.
Dependencies are inferred from the claim text.