|5611906||Preparation of N-allyl compounds|
A process for the preparation of N-allyl compounds of the general formula I ##STR1## in which ##STR2## denotes a nitrogen-containing heterocyclic compound, R1, R3, and R4 independently denote hydrogen or C1
|5217599||Bonding of polyimide film|
Disclosed is a method for electroplating a metal sheet adapted for being used in electronic packaging material, such as printed circuit boards. Bismaleimide and its derivative are added into the plated solution so as to form insoluble particles of bismale...
|5024736||Process for electroplating utilizing disubstituted ethane sulfonic compounds as electroplating auxiliaries and electroplating auxiliaries containing same|
A process in which disubstituted ethane sulfonic compounds are employed as electroplating auxiliaries in electroplating. The compounds for use in combination with the claimed process have the general formula: ##STR1## wherein, A represents a pyridini...
|4441969||Coumarin process and nickel electroplating bath|
A process and electroplating bath for use in electrodepositing nickel on a base where the electroplating bath includes a coumarin compound and an aryl hydroxy carboxylic acid compound, such as salicylic acid, present in a combined amount effective to prov...
|4430171||Electroplating baths for nickel, iron, cobalt and alloys thereof|
An aqueous electroplating bath for nickel, cobalt, nickel-cobalt, nickel-iron, cobalt-iron or nickel-cobalt-iron is described which contains, as a brightening agent, a quaternary amine sulfobetaine of the formula ##STR1## wherein N+ i...
|4421611||Acetylenic compositions and nickel plating baths containing same|
A new acetylenic composition, 3-(2-propynoxy)-2-propenoic acid, and its methods of preparation are described. Also, acetylenic compositions are described which are prepared by the process which comprises the steps of (a) reacting propargyl alcohol with an alka...
|4212709||Acidic nickel electroplating bath containing sulfobetaines as brighteners and levelling agents|
An acidic nickel electroplating bath containing brighteners and levelling agents, wherein the levelling agents are compounds of the formula I ##STR1## where N is a hetero-aromatic nitrogen base, R, R1 and R2 are hydrogen or al...
|4183789||Anode bag benefaction|
In accordance with certain of its aspects this invention relates to a process and composition for the prevention of anode bag clogging in the preparation of an electrodeposit which contains nickel or; binary or ternary alloys of the metals selected from n...
|4101388||Prevention of anode bag clogging in nickel iron plating|
This invention relates to a process and composition for the preparation of an electrodeposit which contains at least one metal selected from the group consisting of nickel, cobalt and iron, which comprises passing current from an anode to a cathode throug...
Novel pyridyl alkyl sulfonic acid betaines useful as additives to nickel electroplating baths....
|4036709||Electroplating nickel, cobalt, nickel-cobalt alloys and binary or ternary alloys of nickel, cobalt and iron|
This invention relates to a process and composition for the preparation of an electrodeposit 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, ...
|4016051||Additives for bright plating nickel, cobalt and nickel-cobalt alloys|
An acidic aqueous solution for use in bright nickel, cobalt, or nickel-cobalt alloy electroplating which includes nickel, cobalt, or nickel-cobalt ions respectively, and at least 0.005 but not exceeding 0.3 grams per liter of the solution consisting of di...
|4010084||Method of and electrolytic bath for the electrodeposition of semibright nickel and nickel-cobalt coatings upon a metal surface|
Semibright (matte-gloss) coatings of nickel or nickel-cobalt are deposited on a metal substrate from a WATT'S-type sulfamiate or fluorobate electroplating bath at a pH of 2.5 to 5.8, a temperature of 15° to 70° C and a current density of 0.5 to 20 A/dm
|3953304||Electroplating baths for nickel and brightener-leveler compositions therefor|
An aqueous acid nickel electroplating bath containing as a brightener-leveling agent the reaction product of an acetylenic diester of a halogenated saturated aliphatic acid with a heterocyclic compound containing a tertiary nitrogen atom. The brightener m...