US 6,283,360 B1 · Composition for preventing creeping of a flux for soldering

Abstract

The present invention relates to a composition for preventing creeping of a flux for soldering, which is free from a problem from the viewpoint of the global environment or working environment. The present invention provides a composition for preventing creeping of a flux for soldering, consisting of a composition comprising a polymer containing polymer units of an unsaturated ester containing a polyfluoroalkyl group, a fluorine-type surfactant and an aqueous medium. Further, the present invention provides a method for soldering by means of the composition. Furthermore, the present invention provides an electronic part or printed board soldered by the method. Still further, the present invention provides an electric appliance employing such an electronic part or printed board.

Claims9

Dependent claims

A method for soldering an electronic part or printed board, comprising:

forming a coating film by drying a composition on the surface of an electronic part or on the surface of a printed board, then treating the surface having the coating film thus formed, with a flux for soldering, and then carrying out soldering;
wherein said composition comprises a polymer, a fluorine-containing surfactant and an aqueous medium;
wherein said polymer contains a first polymer unit;
wherein said first polymer unit is a polymer unit of an unsaturated ester containing a polyfluoralkyl group, or a polymer unit of an unsaturated ester containing a polyfluoroalkyl group having an etheric oxygen atom inserted in the carbon-carbon bond.

1 more element

Dependencies are inferred from the claim text.

Composition for preventing creeping of a flux for soldering

Life of this patent

Composition for preventing creeping of a flux for soldering

Life of this patent

Abstract

Claims9