Patent ID: 6306223
Filing Date: 2001-10-23
Classification: C11D,C23G,H05K,Y10S

Abstract:
A process for removing fatty compounds from an article having a surface, comprising the steps of:1) carrying out on the surface of the article at least a first degreasing operation, with a surfactant-free solvent mixture comprising at least one compound (a) being a C.sub.1 -C.sub.4 dialkyl ester of at least one C.sub.4 -C.sub.6 aliphatic diacid, and at least one compound (b) being miscible in the compound (a) and dissolving the fatty compounds, and contaminating the article,2) optionally, carrying out at least a second degreasing operation with a solvent mixture comprising one or more of the compound (a) and one or more of the compound (b), with a compound (a)/compound (b) volume ratio of greater than or equal to 1,3) carrying out a third degreasing operation with only the compound (a) to remove any trace of the compound (b) at the surface of said article, and4) rinsing the article with water.