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US 4,049,509 AGranted
Plating
AssigneeW. Canning & Company Limited
InventorsTony Eugene Such, Apoloniusz Wyszynski, Barrie Sydney James
Life of this patent
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Abstract
The mixture present after reaction of an acetylenic diol and less than an equimolar amount of an alkylene oxide or the like oxirane compound, and comprising a proportion of unreacted acetylenic diol starting material together with proportions of the mono-substituted and di-substituted reaction products is used as a nickel-plating bath additive. Preferred ranges for the reaction mixture of diol/oxirane are 1 : 0.5. to 1 : 0.95, and a preferred combination is 2-butyne-1,4-diol and propylene oxide.
Claims12
A plating additive consisting essentially of:
- a. about 45.5 to about 50 parts of monopropoxylated 2-butyne-1, 4diol;
- b. about 11.5 to about 33.5 parts of dipropoxylated 2-butyne-1, 4-diol;
- and
- c. about 42.5 to about 17 parts of 2-butyne-1, 4-diol,
- all parts by weight based on 100 parts of the three components.
2 more elements
Dependencies are inferred from the claim text.