Loading patent…
AssigneesBacs Megyei Allami Epitoipari Vallalat, Csepel Muvek Tervezo es Kutato Intezete
InventorsMihaly Stefan, Zoltan Hegedus, Terezia Bagi nee Schmidt, Henrik Dorner, Miklos Kanyo, Pal Fuzesi
Estimating the term…
The invention relates to a process for coating fibrous glass with a glass metal mainly consisting of nickel-phosphorus, under conditions free of current. According to the process a fibrous glass substrate is treated with an aliphatic alcohol having 1 to 4 carbon atoms and subsequently with an aqueous solution of SnCl.sub.2, in the presence of hydrochloric acid, and is then activated with a solution of palladium chloride in aqueous hydrochloric acid. Thereafter the pretreated and activated substrate is kept in a bath comprising nickel ammonium sulfate or nickel sulfate and nickel ammonium sulfate as a nickel-containing component, in combination with sodium hypophosphite, an alkali metal salt of at least one organic acid having a low molecular weight, a mineral acid, preferably sulfuric acid or hydrochloric acid in an amount sufficient to adjust the pH to 3 to 4, and optionally organic or inorganic metal-deposition regulating agent(s) at a temperature between 50.degree. to 90.degree. C.
A process for coating on a fibrous glass substrate an amorphous glass metal coating consisting essentially of nickel-phosphorus, under conditions free of current, which comprises treating the fibrous glass substrate with an aliphatic alcohol having 1 to 4 carbon atoms, and subsequently with an aqueous solution of Sn Cl.sub.2, in the presence of hydrochloric acid, activating said substrate with a solution of palladium chloride in aqueous hydrochloric acid and keeping it in a bath comprising, as a nickel containing component, nickel ammonium sulfate or a mixture of nickel sulfate and nickel ammonium sulfate, in combination with sodium hypophosphite, an alkali metal salt of at least one organic acid having a low molecular weight, a mineral acid, in an amount sufficient to adjust the pH to 3 to 4, and optionally one or more organic or inorganic metal-deposition regulating agents, at a temperature between 55 degrees Celsius and 70 degrees Celsius.
Dependencies are inferred from the claim text.