| 摘要 |
<p>The present invention offers an alternative to the chlorofluorocarbons which have been used in the cleaning industry. In particular, the present invention uses a solution having tetrahydrofurfuryl alcohol (THFA) and an activator. As activators, compounds of the formula <CHEM> wherein R1, R2 and R3 are independently hydrogen, C1-C7 alkyl, C5-C6 cycloalkyl, furanyl which can be substituted by C1-C7 alkyl, tetrahydrofuranyl which can be substituted by C1-C7 alkyl, pyrrolyl, pyrrolidinyl, benzyl which can be substituted by C1-C7 alkyl, phenyl which can be substituted by C1-C7 alkyl, C1-C7 alkenyl, C1-C7 alkynl, furfuryl which can be substituted by C1-C7 alkyl, or tetrahydrofurfuryl which can be substituted by C1-C7 alkyl, wherein R1, R2 and R3 can be substituted by at least one hydroxy group, provided that R1, R2 and R3 are not simultaneously hydrogen, or (II) R4- @-O-R5 wherein R4 is hydrogen, C1-C6 alkyl, C5-C6 cycloalkyl, furanyl which can be substituted by C1-C6 alkyl, tetrahydrofuranyl which can be substituted by C1-C6 alkyl, pyrrolyl, pyrrolidinyl, or benzyl which can be substituted by C1-C6 alkyl, R5 is C1-C6 alkyl, C5-C6 cycloalkyl, furanyl which can be substituted by C1-C6 alkyl, tetrahydrofuranyl which can be substituted by C1-C6 alkyl, furfuryl which can be substituted by C1-C6 alkyl, tetrahydrofurfuryl which can be substituted by C1-C6 alkyl, pyrrolyl, pyrrolidinyl, benzyl which can be substituted by C1-C6 alkyl, or the group -(C)a-O-(C)b-O-(C)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, which can be substituted by C1-C6 alkyl or C1-C6 alkenyl, or butyrolactone.</p> |
