초록 ▼

The detergent of this invention, directed to the cleaning of an object having a gap portion at least in part thereof, contains at least one of components of the detergent having a solubility parameter difference of not more than 3 from and a contact angle within 15.degree. with at least one of compo

The detergent of this invention, directed to the cleaning of an object having a gap portion at least in part thereof, contains at least one of components of the detergent having a solubility parameter difference of not more than 3 from and a contact angle within 15.degree. with at least one of components of a smear on the object. The detergent provides an ideal cleaning for the object because it easily permeates into and dissolves the machining oil filling the gaps between closely cohering thin metallic strips. The method of cleaning according to the invention has first cleaning the object with a polar detergent and then rinsing and drying the cleaned object with a detergent having low polarity or no polarity. In the precision cleaning of such objects as electronic parts, therefore, it manifests satisfactory cleaning and drying properties. The detergent and the method of cleaning mentioned above are both safe in the environment because they have no use for such detergents as the Flon type and the chlorine type solvents which induce the destruction and the pollution of the environment.

대표청구항 ▼

[ We claim:] [1.] A method for cleaning an object that has a smear of a machining oil containing at least one component selected from the group consisting of base oil, oiliness agent, and extreme pressure agent, wherein the object includes a gap portion, the method comprisingcleaning the gap portion

[ We claim:] [1.] A method for cleaning an object that has a smear of a machining oil containing at least one component selected from the group consisting of base oil, oiliness agent, and extreme pressure agent, wherein the object includes a gap portion, the method comprisingcleaning the gap portion of the object with a detergent comprising a component that has a solubility parameter difference of not more than 3 with at least one component of the smear.