摘要:
The instant invention is directed to an aqueous bath for the electrodeposition of bright metal deposits, and more particularly to a bath composition which provides upon the basis metal an electrodeposit having improved brightness, particularly in low current density areas, and as well, a condition of ductility markedly better than that which characterizes certain prior art baths. The electroplating bath composition of this invention embodies a polyethylenimine having the general empirical formula --[C.sub.2 H.sub.5 N].sub.x --, and a sulfonating agent for the polyethylenimine, whereby there is obtained a reaction product which contains nitrogen substituted sulfamate groups as an integral part of the polymer chain. The nitrogen substituted sulfamate unit of the reaction product is represented by the formula: ##STR1## where, M = H, Li, Na, K, or, NH.sub.4. The ratio of these nitrogen substituted sulfamate units to amino units, --[CH.sub.2 CH.sub.2 NH]--, in the reaction product is determined by the molar ratio of the polymer repeat unit, --[C.sub.2 H.sub.5 N]--, to sulfonating agent in the reaction.
摘要:
The new 1-monochloro- and 1,1-dichloro-prop-2,3-ene-3-sulfonic acids and their metal salts, and a process for their manufacture by reacting chloropropanesulfonic acid compounds with alkali metal carbonates, alkali metal bicarbonates and/or alkaline earth metal hydroxides at from 5.degree. to 100.degree. C to give 1-chloro-prop-2,3-ene-3-sulfonates which may then be reacted with acid compounds in a second step.The products are starting materials for the manufacture of pesticides, plasticizers, solvents, leather greases, detergents, lubricating oils, synthetic resins and slip agents. They are also assistants in electroplating processes and starting materials for the manufacture of such assistants.
摘要:
This invention relates to a process and composition for the preparation of an electro-deposit which contains; at least one metal selected from the group consisting of nickel and cobalt or; binary or ternary alloys of the metals selected from nickel, iron, and cobalt; which comprises passing current from an anode to a cathode through an aqueous acidic electroplating solution containing at least one member selected from nickel compounds and cobalt compounds and which may additionally contain iron compounds providing nickel, cobalt and iron ions for electrodepositing nickel, cobalt, nickel-cobalt alloys, nickel-iron alloys, cobalt-iron alloys or nickel-iron-cobalt alloys; the improvement comprising the presence of 5 .times. 10.sup.-6 moles per liter to 0.5 mole per liter of an unsaturated cyclosulfone exhibiting the following generalized structural formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently hydrogen, lower alkyl, or hydroxyl;For a time period sufficient to form a metal electroplate upon said cathode.
摘要:
A process for maintaining a continuous and stable aqueous nickel sulfamate electroforming solution adapted to form a relatively thin, ductile, seamless nickel belt by electrolytically depositing nickel from said solution onto a support mandrel and thereafter recovering said nickel belt by cooling said nickel coated mandrel effecting a parting of the nickel belt from the mandrel due to different respective coefficients of thermal expansion comprising: establishing an electroforming zone comprising a nickel anode and a cathode comprising said support mandrel, said anode and cathode being separated by said nickel sulfamate solution maintained at a temperature of about 140* to 160* F and having a current density therein ranging from about 200 to about 500 amps/ft2; imparting sufficient agitation to said solution to continuously expose said cathode to fresh solution; maintaining said solution within said zone at a stable equilibrium composition: Total Nickel 12.0 to 15.0 oz/gal Halide as NiX2.6H2O 0.11 to 0.23 moles/gal H3BO3 4.5 to 6.0 oz/gal ELECTROLYTICALLY REMOVING METALLIC AND ORGANIC IMPURITIES FROM SAID SOLUTION UPON EGRESS THEREOF FROM SAID ELECTROFORMING ZONE: CONTINUOUSLY CHARGING TO SAID SOLUTION ABOUT 1.0 TO 2.0 X 10 4 MOLES OF A STRESS REDUCING AGENT PER MOLE OF NICKEL ELECTROLYTICALLY DEPOSITED FROM SAID SOLUTION; PASSING SAID SOLUTION THROUGH A FILTERING ZONE TO REMOVE ANY SOLID IMPURITIES THEREFROM; COOLING SAID SOLUTION SUFFICIENTLY TO MAINTAIN THE TEMPERATURE WITHIN THE ELECTROFORMING ZONE UPON RECYCLE THERETO AT ABOUT 140* TO 160* F. at the current density in said electroforming zone; and recycling said solution to said electroforming zone.
摘要:
A WATTS BRIGHT NICKEL ELECTROPLATING BATH CONSISTING OF FROM 0.1 TO 1 G./L. OF A MIXTURE OF ACETYLENIC COMPOUNDS INCLUDING BOTH AN A-HYDROXY-ACETYLENIC COMPOUND AND AN ALKYLENE OXIDE CONDENSATION PRODUCT OF AN A-HYDROXY-ACETYLENIC COMPOUND IN A WEIGHT RATIO OF THE SAID CONDENSATION PRODUCT TO THE A-HYDROXY-ACETYLENIC COMPOUNDS OF FROM 1.5:1 TO 7:1, AND 0.2 OR 0.5 G./L. OR SACCHARIN.
摘要:
AN AQUEOUS NICKEL PLATING ELECTROLYTE COMPRISES (A) AT LEAST 30 GM. PER LITER OF A NICKEL-II SALT; (B) 0.1-1.0 GM. PER LITER OF A MIXTURE OF ACETYLENIC COMPOUNDS INCLUDING BOTH AN ALFA-HYDROXY-ACETYLENIC COMPOUND AND AN ALKYLENE OXIDE CONDENSATION PRODUCT OF AN ALFA-HYDROXY-ACETYLENIC COMPOUND IN A WEIGHT RATIO OF THE SAID CONDENSATION PRODUCTS TO THE ALFA-HYDROXY-ACETYLENIC COMPOUNDS OF FROM 1.5:1 TO 7:1; AND (C) FROM 1.0 TO 5.0 GM. PER LITRE OF SACCHARIN OR A SUBSTITUTED SACCHARIN.
摘要:
THE NOVEL PROCESS OF THIS INVENTION FOR ELECTROPLATING A SEMI-BRIGHT SUFLUR-FREE, NICKEL PLATE ONTO A BASIS METAL COMPRISING PASSING FROM AN ANODE TO A BASIS METAL CATHODE THROUGH AN AQUEOUS ACIDIC NICKEL PLATING SOLUTION CONTAINING AT LEAST ONE NICKEL COMPOUND PROVIDING NICKEL IONS FOR ELECTROPLATING OF NICKEL, AND INCLUDING AS COOPERATING SEMI-BRIGHT ADDITIVES: (A) THE ALIPHATIC ACETYLENIC COMPOUND 3-HEXYNE-2,5-DIOL, AND (B) A COMPOUND CONTAINING AN OXYAMEGASULFOHYDROCARBON-DI-YL COUMARIN ANION WHEREIN THE HYDROCARBON-DI-YL MOIETY CONTAINS AT LEAST TWO CARBON ATOMS AND WHEREIN THE OXYOMEGASULFOHYDROCARBON-DI-YL GROUP IS SUBSTITUTED ON THE CARBOCYLIC NUCLEUS OF THE COUMARIN GROUP.