Solvent blend for removing flux residues

Details Solvent blend for removing flux residues Solvent blend for removing flux residues

1985-02-15

1986-07-01

Albrecht, Dennis L.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

134 31, 134 38, 134 40, 252170, 252171, 252172, 570107, 570108, 570110, 570118, B08B 308, C07C 1742, C11D 750, C23G 5028

Patent

active

045978905

ABSTRACT:
Stable methylchloroform solvent compositions in combination with from about 3 to about 5 volume percent of 2-butanol and from about 1 to about 3 volume percent of 3-methyl-1-butyn-3-ol have been shown to be superior solvents for removing flux from circuit boards. Such compositions have no flash point and maintain excellent distribution of the components in the vapor and liquid sections of the defluxing apparatus.

REFERENCES:
patent: 3049571 (1962-08-01), Brown
patent: 3326988 (1967-06-01), Stack
patent: 3932297 (1976-01-01), Clementson
patent: 3974230 (1976-08-01), Archer
patent: 4023984 (1977-05-01), Clementson
patent: 4524011 (1985-06-01), Tasset
Dow Chemical Bulletin: "PRELETE--New Generation Defluxer for High Efficiency PWA Defluxing", Form No. 100-5927-83, published by Dow Chemical, U.S.A., Midland, Michigan 48640.
Dow Bulletin: "CHLOROTHENE SM and Methylene Chloride Solvents", Form No. 100-5869-82, published by Dow Chemical, U.S.A., Midland, Mich. 48640.

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