Furfuryl alcohol mixtures for use as cleaning agents

Details Furfuryl alcohol mixtures for use as cleaning agents Furfuryl alcohol mixtures for use as cleaning agents

1993-03-26

1994-05-03

Breneman, R. Bruce

Cleaning and liquid contact with solids

Processes

For metallic, siliceous, or calcareous basework, including...

134 40, 252173, 252541, 252544, 252DIG14, B08B 700, C11D 118, C11D 326, C11D 732

Patent

active

053084020

ABSTRACT:
A method for removing flux residue from an electronic component using a solution having tetrahydrofurfuryl alcohol (THFA) and an activator. As activators, compounds of the formula ##STR1## are used, wherein R.sub.1, R.sub.2 and R.sub.3 are independently hydrogen, C.sub.1 -C.sub.7 alkyl, C.sub.5 -C.sub.6 cycloalkyl, furanyl which can be substituted by C.sub.1 -C.sub.7 alkyl, tetrahydrofuranyl which can be substituted by C.sub.1 -C.sub.7 alkyl, pyrrolyl, pyrrolidinyl, benzyl which can be substituted by C.sub.1 -C.sub.7 alkyl, phenyl which can be substituted by C.sub.1 -C.sub.7 alkyl, C.sub.1 -C.sub.7 alkenyl, C.sub.1 -C.sub.7 alkenyl, furfuryl which can be substituted by C.sub.1 -C.sub.7 alkyl, or tetrahydrofurfuryl which can be substituted by C.sub.1 -C.sub.7 alkyl, wherein R.sub.1, R.sub.2 and R.sub.3 can be hydroxy groups, where R.sub.1, R.sub.2 and R.sub.3 are not simultaneously hydrogen, R.sub.4 is hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.6 cycloalkyl, furanyl which can be substituted by C.sub.1 -C.sub.6 alkyl, tetrahydrofuranyl which can be substituted by C.sub.1 -C.sub.6 alkyl, pyrrolyl, pyrrolidinyl, or benzyl which can be substituted by C.sub.1 -C.sub.6 alkyl, R.sub.5 is C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.6 cycloalkyl, furanyl which can be substituted by C.sub.1 -C.sub.6 alkyl, tetrahydrofuranyl which can be substituted by C.sub.1 -C.sub.6 alkyl, furfuryl which can be substituted by C.sub.1 -C.sub.6 alkyl, tetrahydrofurfuryl which can be substituted by C.sub.1 -C.sub.6 alkyl, pyrrolyl, pyrrolidinyl, benzyl which can be substituted by C.sub.1 -C.sub.6 alkyl, or the group --(C).sub.1 --O--(C).sub.b --O--(C).sub.b --OH wherein a is from 1 to 3 and b is from 1 to 4, can be used. In addition to the activators (I) or (II), the present invention can also include as activators cyclic or non-cyclic diamines, pyrrolidone, optionally substituted by C.sub.1 -C.sub.6 alkyl or C.sub.1 -C.sub.6 alkenyl, or butyrolactone.

REFERENCES:
patent: 4207421 (1980-01-01), Scardera et al.
patent: 4568395 (1986-02-01), Nabhani
patent: 4617251 (1986-10-01), Sizensky
patent: 4737195 (1988-04-01), Carandang et al.

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