	US 12,280,454 B2
	Flux for brazing
Ulrich Seseke-Koyro, Isernhagen (DE); and Andreas Becker, Lachendorf (DE)
Assigned to Solvay SA, Brussels (BE)
Filed by SOLVAY SA, Brussels (BE)
Filed on Nov. 25, 2020, as Appl. No. 17/104,661.
Application 17/104,661 is a continuation of application No. 15/124,709, abandoned, previously published as PCT/EP2015/055003, filed on Mar. 11, 2015.
Claims priority of application No. 14158706 (EP), filed on Mar. 11, 2014.
Prior Publication US 2021/0078114 A1, Mar. 18, 2021
Int. Cl. B23K 35/36 (2006.01); B23K 1/20 (2006.01); B23K 35/02 (2006.01); B23K 35/362 (2006.01); B23K 35/365 (2006.01)

CPC B23K 35/362 (2013.01) [B23K 1/203 (2013.01); B23K 35/0222 (2013.01); B23K 35/0244 (2013.01); B23K 35/3602 (2013.01); B23K 35/3605 (2013.01); B23K 35/3606 (2013.01); B23K 35/3611 (2013.01); B23K 35/365 (2013.01)]

17 Claims

1. A flux comprising a fundamental flux, wherein the fundamental flux comprises:

from 80 mol % to 100 mol % KAlF₄, and

one or more components selected from the group consisting of K₂AlF₅, K₃AlF₆, potassium fluorozincates, cesium fluoroaluminates, potassium fluorostannates and cesium fluorostannates, and hydrates thereof, wherein the one or more components are comprised in the fundamental flux from 0 to 20 mol %, adding up with the content of KAlF₄to 100 mol %,

wherein the content of K₃AlF₆in the fundamental flux is equal to or lower than 2 mol % including 0 mol %,

wherein the content of free KF in the flux is lower than 0.2% by weight including 0% by weight, and

wherein the flux further comprises from 0.1 to 8 weight % relative to the total weight of the flux of at least one additive salt selected from group consisting of BaF₂and SrF₂.