Baths of organic sulfonate solution for bismuth and bismuth...

Details Baths of organic sulfonate solution for bismuth and bismuth... Baths of organic sulfonate solution for bismuth and bismuth...

C - Chemistry, Metallurgy

25

D

204/28

C25D 3/54 (2006.01) C25D 3/56 (2006.01)

Patent

CA 1311713

ABSTRACT OF THE DISCLOSURE A bismuth or bismuth alloy plating bath comprises as essen- tial ingredients an organic sulfonic acid of the general formula (I) (X1)n-R-SO3H ------ (I) wherein R is a C1-5 alkyl radical, X1 is a halogen atom or hydroxyl, aryl, alkylaryl, carboxyl, or sulfonyl radical which may be in any optional position of the alkyl radical, and n is an integer of 0 to 3, or of the formula (II) Image ------ (II) wherein X2 is a halogen atom or hydroxyl, alkyl, aryl, alkylaryl, aldehyde, carboxyl, nitro, mercapto, sulfonyl, or amino radical, or two X2's which may combine with a benzene ring to form a naphthalene ring, and m is an integer of 0 to 3, and a bismuth salt of the acid or a mixture of the bismuth salt of the acid and one or more other metal salts of the acid.

519048

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