摘要:
Disclosed is a phosphate-free aqueous acidic conversion coating comprising zinc sulfate and sulfuric acid. The conversion coating finds special use as a conversion coating to metal substrates prior to application of a cold forming lubricant or prior to application of a paint. The conversion coatings according to the present disclosure avoid the issues associated with phosphate containing conversion coatings but provide similar benefits to phosphate-based conversion coatings. Optional components of the conversion coating solutions include one or more of pH adjustment neutralizers, coating stabilizers, coating accelerators, coating refiners, etchants, paint adhesion promoters and mixtures thereof. In an additional option, manganese oxide can be used in place of zinc oxide.
摘要:
An object is to provide a 2-benzyl-4-(2,4-dichlorophenyl)-5-methylimidazole compound useful as an antioxidant for copper surface, a curing agent for epoxy resins, or an intermediate for medicaments and agricultural chemicals. A 2-benzyl-4-(2,4-dichlorophenyl)-5-methylimidazole compound represented by the formula (I). The compound can be synthesized by reacting a 2-halogenated 2',4'-dichloropropiophenone compound with an arylacetamidine compound under heating in the presence of a dehydrohalogenating agent in an organic solvent. (I) wherein X 1 and X 2 are the same or different and represent a hydrogen atom, a chlorine atom, or a bromine atom.
摘要:
An object is to provide a surface treating agent, which in mounting electronic parts or the like to a printed wiring board using a lead-free solder, forms a chemical layer having excellent heat resistance on the surface of copper or a copper alloy constituting a circuit part of a printed wiring board or the like and at the same time, improves the wettability to the solder and makes the solderability good, and a surface treatment method. Also, another object is to provide a printed wiring board resulting from bringing the surface of copper or a copper alloy constituting a copper circuit part into contact with the foregoing surface treating agent and to provide a soldering method by bringing the surface of copper or a copper alloy into contact with the foregoing surface treating agent and then performing soldering using a lead-free solder. A surface treating agent for copper or a copper alloy, which contains an imidazole compound represented by the formula (I): (I) wherein Ar 1 and Ar 2 are different and represent the following formula (II) or formula (III); R represents a hydrogen atom or an alkyl group: (II) (III) wherein X 1 and X 2 are the same or different and represent a hydrogen atom or a chlorine atom.
摘要:
A surface treating agent for copper or a copper alloy, which contains an imidazole compound represented by the formula (I): wherein R represents a hydrogen atom or an alkyl group, X 1 and X 2 are the same or different and represent a chlorine atom or a bromine atom; m and n represent an integer of 0 to 3 and at least one of m or n is 1 or more. The surface treating agent is also used in surface treating methods, in making printed wiring boards and in soldering methods.
摘要:
An aqueous composition for surface treatment of copper or copper alloys is disclosed which enables soldering in which a lead-free solder is used. The aqueous composition contains a compound represented by the following formula (1): (1) (wherein R represents a hydrogen atom or a methyl group; and R and R represent hydrogen atoms when R and R represent chlorine atoms, while R and R represent chlorine atoms when R and R represent hydrogen atoms).
摘要:
A method for treating a micro-roughened metal surface to improve bonding between the metal surface and a polymer material. The method involves post-treating the micro-roughened conversion coated metal surface with an aqueous wetting agent composition after having formed the micro-roughened conversion coated metal surface with an adhesion promotion composition. The method can be employed in the circuit board industry to improve bonding between layers in multilayer circuit boards.
摘要:
The present invention relates to a solution and to a method of treating copper surfaces, the copper surfaces being brought into contact with an acidic treatment liquid which contains hydrogen peroxide and at least one five-membered heterocyclic compound as well as additionally at least one microstructure modifying agent selected form the group comprising thioles A, disulfides B, sulfides, C and thioamides D having the respective general formulae wherein R and R = alkyl, alkenyl, aryl, aralkyl, especially benzyl, cycloalkyl and the derivatives thereof and R = R , R -O, R -S, amino or substituted amino, wherein R and R may especially be phenyl or substituted phenyl.
摘要翻译:本发明涉及一种处理铜表面的方法和方法,所述铜表面与含有过氧化氢和至少一种五元杂环化合物的酸性处理液接触,另外还包括至少一种微结构修饰 选自具有以下通式的硫醇A,二硫化物B,硫化物,C和硫代酰胺D的基团,其中R 1和R 2 =烷基,烯基,芳基,芳烷基,特别是苄基,环烷基及其衍生物 R 3 = R 1,R 1 -O,R 1 -S,氨基或取代的氨基,其中R 1和R 2可以特别是苯基或取代的苯基。