BRAZING-USE FLUX COMPOSITION AND POWDER BRAZING COMPOSITION, ALUMINUM ALLOY MEMBER AND HEAT EXCHANGER, AND ALUMINUM ALLOY MEMBER PRODUCTION METHOD AND HEAT EXCHANGER PRODUCTION METHOD

WIPO Patent Application WO/2021/014607

A1

The flux composition according to the present invention contains a fluoride-based flux, a resin, and a solvent. The solvent is water or a water-soluble organic solvent. When a specific evaporation amount Qa for a solvent a is defined as the ratio of the evaporation amount for the solvent a to the evaporation amount of butyl acetate, and, for the specific evaporation amount Qa determined by the formula below, a solvent 1 for which Qa > 60, a solvent 2 for which 60 ≥ Qa > 10, and a solvent 3 for which Qa ≤ 10 are considered, the mixing mass proportions thereof satisfy: solvent 1:solvent 2:solvent 3 = 0 to 20%:30 to 70%:10 to 60%. (Qa represents the specific evaporation amount of the solvent a; Pa represents the saturation vapor pressure (20°C) of the solvent a; Ma represents the molecular weight of the solvent a; Pbutyl acetate represents the saturation vapor pressure (20°C) of butyl acetate; and Mbutyl acetate represents the molecular weight of butyl acetate.)

UESUGI RYUJI (JP)
HYOGO YASUNORI (JP)
KUME HIDEO (JP)

PCT/JP2019/028998

January 28, 2021

July 24, 2019

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MITSUBISHI MATERIALS CORP (JP)
MITSUBISHI ALUMINIUM (JP)

B23K35/363

WO2017006580A1

2017-01-12

JP2014100737A	2014-06-05
JP2019042805A	2019-03-22
JPH08246086A	1996-09-24
JP2002144078A	2002-05-21
JPH0929487A	1997-02-04
JP2019122970A	2019-07-25

MATSUNUMA Yasushi et al. (JP)

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