Flux compositions for brazing aluminum, their films and brazing method
AssigneeToyo Aluminium Kabushiki Kaisha
InventorsHaruzo Katoh, Takashi Watsuji, Ken Matsumura
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Abstract
A flux composition for brazing aluminum, comprising a fluoride flux, at least one selected from a butyl rubber and a petroleum resin, and a solvent. The novel flux composition has excellent processing properties and provides brazed areas (fillets) with good appearance.
Claims12
A flux composition for brazing aluminum comprising:
- (a) a fluoride flux,
- (b) at least one member selected from a butyl rubber and a petroleum resin, and
- (c) a solvent,
- wherein the butyl rubber has a molecular weight ranging from 250,000 to 550,000.
A film prepared by coating at least a part of a surface of an aluminum brazing sheet with a composition comprising:
- (a) a fluoride flux,
- (b) at least one member selected from a butyl rubber and a petroleum resin, and
- (c) a solvent,
- wherein the butyl rubber has a molecular weight ranging from 250,000 to 550,000.
An aluminum brazing sheet coated with a composition comprising:
- (a) a fluoride flux,
- (b) at least one member selected from a butyl rubber and a petroleum resin, and
- (c) a solvent,
- wherein the butyl rubber has a molecular weight ranging from 250,000 to 550,000.
A flux composition for brazing aluminum comprising:
- (a) a fluoride flux,
- (b) at least one member selected from a butyl rubber and a petroleum resin,
- (c) a solvent, and
- (d) a metallic powder for brazing,
- wherein the butyl rubber has a molecular weight ranging from 250,000 to 550,000.
A film prepared by coating at least a part of a surface of an aluminum material with a composition comprising:
- (a) a fluoride flux,
- (b) at least one selected from a butyl rubber and a petroleum resin,
- (c) a solvent, and
- (d) a metallic powder for brazing,
- wherein the butyl rubber has a molecular weight ranging from 250,000 to 550,000.
An aluminum material coated with a composition comprising:
- (a) a fluoride flux,
- (b) at least one selected from a butyl rubber and a petroleum resin,
- (c) a solvent, and
- (d) a metallic powder for brazing,
- wherein the butyl rubber has a molecular weight ranging from 250,000 to 550,000 .
Dependencies are inferred from the claim text.