Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
  • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
  • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
  • C07D213/06—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom
  • C07D213/16—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom containing only hydrogen and carbon atoms in addition to the ring nitrogen atom containing only one pyridine ring
  • C07D213/20—Quaternary compounds thereof
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D215/00—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems
  • C07D215/02—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom
  • C07D215/04—Heterocyclic compounds containing quinoline or hydrogenated quinoline ring systems having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen atoms or carbon atoms directly attached to the ring nitrogen atom with only hydrogen atoms or radicals containing only hydrogen and carbon atoms, directly attached to the ring carbon atoms
  • C07D215/10—Quaternary compounds
• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
  • C25D3/00—Electroplating: Baths therefor
  • C25D3/02—Electroplating: Baths therefor from solutions
  • C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
  • C25D3/14—Electroplating: Baths therefor from solutions of nickel or cobalt from baths containing acetylenic or heterocyclic compounds
  • C25D3/18—Heterocyclic compounds

Definitions

• This invention relates to a nickel electroplating method and bath wherein additives are used having brightening and leveling properties.
• additives are organic compounds having cyclic quaternary ammonium and sulfonamide, disulfimide or sulfocarbonimide groups.
• organic compounds which contain at least one cyclic, quaternary ammonium group and at least one sulfonamide, disulfimide or sulfocarbonimide group in the molecule, exhibit excellent brightening and leveling properties in acid nickel electroplating baths.
• diaryl-disulfimides or halosubstituted diaryl-disulfimides as brightening agents in nickel electroplating baths.
• sulfoca-rbonimides have already been used as brightening agents in nickel electroplating baths.
• the inner salts of pyridine alkane sulfonic acids have also been used as leveling agents in acid nickel electroplating baths.
• all of these products have the disadvantage that optimum effects can be achieved with them only in combination with other additives, such as brightening, leveling, pore-prevention and wetting agents.
• the agents according to the present invention When the agents according to the present invention are used, only the addition of wetting agents is necessary in order to achieve high performance baths which fulfill all the requirements even under the most difiicult conditions.
• the baths according to the present invention have the following advantages:
• the control of the baths is simple because only one bath component needs to be controlled.
• the analytical control of the active substances according to the present invention is particularly easy because they exhibit a strong ultra-violet absorption.
• the substances do not need to be isolated first by precipitation, extraction or organic solvents or similar manipulations, but instead it suffices to dilute 1 cc. of the bath fluid with water to a volume of 100 cc. and to measure the extinction of this dilute solution.
• the baths are substantially more economical than the previous bath combinations because the electrochemical decomposition of the agents used in accordance with the present invention is much less than that of known products.
• a further advantage of the use of the agents according to the present invention is the easy regeneration property of the bath with the aid of activated charcoal.
• the products used in accordance with the present invention are, as described above, characterized by at least one cyclic quaternary ammonia group, which may, for example, be'derived from heterocyclic tertiary bases such as pyridine, quinoline, isoquinoline, pyrimidine, pyrazine, thiazole, etc., and by at least one sulfonamide, disulfimide or sulfocarbonimide group.
• heterocyclic tertiary bases such as pyridine, quinoline, isoquinoline, pyrimidine, pyrazine, thiazole, etc.
• a compound which is active pursuant to the present invention of the formula is obtained by reacting 1-chloromethyl-benzene-4-sulfamide with an equimolecular arnountof pyridine in an aqueous medium or in excess pyridine at 90 C.
• the agents according to the present invention are added to the nickel electroplating baths in amounts of 50 mgm. to 5 gm. per liter, preferably in amounts of l00 to 500 mgm./l, of bath fluid.
• the products may also be used in the electroplating baths in the form of difiicultly soluble, controlled release agents which gradually go into solution or may be inserted into solution filters. In this manner self-regulating baths are provided which require still less surveillance.
• the high stability of the compounds in the operation of the electroplating baths is particularly advantageous under these conditions.
• EXAMPLE III 0.2 to 0.4 gm. of the compound of formula 9 and 0.1 gm. of sodium dodecylsulfate as brightening agent, both perliter of bath fluid, were added to a nickel bath of the @if i il Watts type.
• the nickel electrodeposits obtained in a current density range of 0.1 to 8 amp./dm. at 55 C. were firmly adhering, ductile, and exhibit an excellent full brightness and strong leveling effect.
• EXAMPLE IV A nickel electroplating bath of the Watts type, which contained per liter of bath fluid 0.1 gm. of sodium dodecylsulfate as a wetting agent, was operated with the product of the formula 4 above as a controlled release additive lying on the bottom of the electroplating cell.
• the bath produced nickel electrodeposits of high brightness and good leveling effects within a current density range of 0.1 to 7 amp/rim. at 55 C.
• EXAMPLE V The compound of Formula 6 above was introduced as a controlled release additive into a solution filter of a nickel bath of the Watts type which contained per liter of bath fluid 0.1 gm. of sodium dodecylsulfate as a wetting agent.
• the bath produced ductile, firmly adhering and satisfactorily bright nickel electrodeposits with a medium leveling effect at 55 C. in a current density range of 0.1 to 4 amp./dm.
• EXAMPLE VI A nickel electroplating bath of the Watts type, which contained per liter of bath fluid 0.1 gm. of sodium dodecylsulfate as a wetting agent, was operated with a product of the Formula 5 above as a conrolled release additive lying at the bottom of the electroplating cell.
• the self-regulating bath produced ductile, firmly adhering, full bright and satisfactory leveled nickel electrodeposits at 60 C. in a current density range of 0.1 to 3 amp./dm.
• the bath was particularly suitable for large scale electroplating operations, for instance, by the drum or bell process.
• a Watts type nickel electroplating bath to which has been added a compound having the general formula where R R R R is lower alkyl, and when terminal a member selected from the group consisting of lower alkyl and carbonamide groups, w'hereat one or all of these groups may be missed,
• X is a member selected from the group consisting of sulfonamide, disulfamide and sulfocarbonimide groups,
• n is an integer from 0 to 1
• o is an integer from 0 to 1
• m is an integer from 0 to l
• p is an integer from 0 to l
• q is an integer from 0 to l, where p and q are not simultaneously 0, in suflicient quantity to obtain bright, level nickel electrodeposits.
• a Watts yp nlckel f P bath to Whlch has '14.
• a method for producing bright, level nickel elecbfiefl added a Compound having the formula trodeposits which comprises forming said electrodeposits r in a Watts type nickel electroplating bath to which has CH SO N-SO CH G 2 G 3 been added a compound having the structural formula 1 PG I r r 1 r N -R XR R X R --N L J. 2 L 3 L J0 L in sufficient quantity to obtain bright, level nickel electrowhere R R R R is lower alkyl, and when, terminal deposits. a member selected from the group consisting of lower 7.
• a Watts type nickel electroplating bath to which has is a cyclic quaternary ammonium group n is a number been added a compound having the formula from 0 to 1, 0 is a number from 0 to 1, Where n and 0 are not simultaneously 0, m is a number from 0 to 1, p is a number from 0 to 1, q is a number from 0 to 1, where p and q are not simultaneously 0, in sufficient quantity to obtain bright, level nickel electrodeposits.
• the quantity of N-CH SO N O Q s 2 the added compound is from about mgm. to about 5 in sufiicient quantity to obtain bright, level nickel electro- P liter of bath- 4() 16.
• the method of claim 14 wherein the quantity of deposits.
• a Watts type'nickel electroplating bath to which has e added Compo d is from about 100 mgm. to 500 been added a compound having the formula mgm. per liter of bath.
• a method for producing bright, level nickel elechaS been added a C mp und ha g the formula 50 trodeposits which comprises forming said electrodeposits I in a Watts type nickel electroplating bath to which has NoH r been added a compound having the structural formula Q C I: -oni-somm] c1- y SO'N SOZ 19.
• a method for producing bright, level nickel electrodeposits which comprises forming said electrodeposits in a Watts type nickel electroplating bath to which has in sufficient quantity to obtain bright, level nickel elecbeen added a compound having m6 Structural formula trodeposits.
• a method for producing bright, level nickel elec CHIGONH @SOFN trodeposits which comprises forming said electrodeposits in sufiicient quantity to obtain bright, level nickel electrom a Watts type nickel electrQplatm'g bath to Whlch has deposits, been added a compound havlng the structural formula 12.
• a method for producing bright, level nickel electrodeposits which comprises forming said electrodeposits 10 in a Watts type nickel electroplating bath to which has been added a compound having the structural formula 25.
• a method for producing bright, level nickel electrodeposits which comprises forming said electrodeposits in 9.
• a method for producing bright, level nickel electrodeposits which comprises forming said electrodeposits in a Watts type nickel electroplating bath to which has been added a compound having the structural formula 23.
• a method for producing bright, level nickel electrodeposits which comprises forming said electrodeposits in 21 Watts type nickel electroplating bath to which has been added a compound having the structural formula trodeposits which comprises forming said electrodeposits in a Watts type nickel electroplating bath towhich has been added a compound having the structural formula References Cited by the Examiner UNITED STATES PATENTS 2,644,788 7/ 1953 Shenk 20449 2,644,789 7/ 1953 Shenk 20449 2,658,867 11/1953 Little 20449 2,757,133 7/1956 Shenk 20449 3,023,151 2/1962 Strauss et al. 20449 3,054,733 9/1962 Heil-ing 20449 3,206,383 9/1965 Kappel 20449 FOREIGN PATENTS 610,888 12/1960 Canada.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Electroplating And Plating Baths Therefor (AREA)

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Citations (8)

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• 1962
  • 1962-12-04 DE DED40436A patent/DE1224112B/de active Pending
• 1963
  • 1963-11-08 GB GB44077/63A patent/GB1056284A/en not_active Expired
  • 1963-11-20 US US325174A patent/US3282811A/en not_active Expired - Lifetime

Patent Citations (8)

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