A nonflammable solvent composition, a method of cleaning an article, and a method of depositing a material on a substrate are disclosed. The nonflammable solvent composition includes a fluorocyclopentane in which 3 to 9 hydrogen atoms have each been replaced by a fluorine atom; trans-1,2-dichloroethylene (t-DCE); and at least one organic compound, such as a C.sub.2-C.sub.6 alcohol, a C.sub.1-C.sub.6 alkane, and a C.sub.3-C.sub.6 cycloalkane. Amounts of the fluorocyclopentane, t-DCE, and the organic compound in the nonflammable composition are selected so that the composition is an azeotrope or is azeotrope-like. The method of cleaning an article includes contacting the article with the nonflammable composition via vapor degreasing or wet cleaning. The method of depositing a material on a substrate includes dissolving the material in the nonflammable solvent composition, applying the composition containing the material to the substrate, and evaporating the composition from the substrate.

A nonflammable solvent composition, a method of cleaning an article, and a method of depositing a material on a substrate are disclosed. The nonflammable solvent composition includes a fluorocyclopentane in which 3 to 9 hydrogen atoms have each been replaced by a fluorine atom; trans-1,2-dichloroethylene (t-DCE); and at least one organic compound, such as a C.sub.2-C.sub.6 alcohol, a C.sub.1-C.sub.6 alkane, and a C.sub.3-C.sub.6 cycloalkane. Amounts of the fluorocyclopentane, t-DCE, and the organic compound in the nonflammable composition are selected so that the composition is an azeotrope or is azeotrope-like. The method of cleaning an article includes contacting the article with the nonflammable composition via vapor degreasing or wet cleaning. The method of depositing a material on a substrate includes dissolving the material in the nonflammable solvent composition, applying the composition containing the material to the substrate, and evaporating the composition from the substrate.

This invention relates to non aqueous non-volatile alkylated siloxane compositions having low VOC and vapor pressure of about 31 millimeters of mercury at 20° C. consisting essentially of a mixture of a linear or open-chain methyl alkylated siloxane having two silicon atoms and a siloxane having three silicon atoms alkylated with methyl groups.

Compositions that include at least one low molecular weight to oxygen containing solvent and one or more compounds of formula (I) wherein R is a C.sub.1-C.sub.6 alkyl; X is a C.sub.1-C.sub.10 alkyl and n is an integer from 0 to 5. Methods of removing polymeric material containing heteroatoms from a surface by contacting the surface with such compositions and wiping the composition at least some portion of the polymeric material from the surface. ##STR00001##

A method of treating an apparatus to remove surface deposits therefrom is performed by selecting a colloidal particle dispersion having inorganic nanoparticles with an average particle size of from 500 nm or less that exhibit properties of Brownian motion that facilitate penetration of solid deposits on surfaces of an apparatus that is subject to surface deposits from contact with fluids. The surfaces of the apparatus are contacted with a treatment composition comprising the colloidal particle dispersion. The composition is allowed to act upon the materials adhering to the surfaces of the apparatus to loosen and breakup the materials adhering to the surfaces of the apparatus. The loosened and broken materials are removed from the surfaces of the apparatus.

The present invention relates to a cleaning apparatus (100) for metal smallware, comprising: a washing chamber (1) apt to receive a solvent and at least one batch of metal smallware soiled with lubricant and configured to carry out a washing cycle to remove at least part of said lubricant from said batch of metal smallware soiled with lubricant by means of said solvent and; suction means (2) connected to said washing chamber (1) and configured to carry out a discharge cycle by sucking said gaseous mixture comprising air and solvent from said washing chamber (1); a main absorption column (4) having a first side (41) and a second side (42) opposite each other, and wherein said first side (41) is hydraulically connected to said suction means (2) so as to receive said gaseous mixture comprising air and solvent and said second side (42) is hydraulically connected to a supply duct (3) so as to receive an absorption liquid from the latter.

In particular, the main absorption column (4) is configured to cause an interaction between a gaseous mixture supplied by said suction means (2) and an absorption liquid supplied by said supply duct (3) so as to perform chemical absorption of a solvent present in said gaseous mixture comprising air and solvent, in said absorption liquid, and therefore reduce the concentration of solvent in the gaseous mixture comprising air and solvent.

A method of treating a pipeline is performed by selecting a colloidal particle dispersion having inorganic nanoparticles with an average particle size of from 500 nm or less that exhibit properties of Brownian motion that facilitate penetration of solid deposits on interior surfaces of a pipeline. A treatment composition comprising the colloidal particle dispersion is introduced into an interior of a pipeline by at least one of (A) introducing a batch amount of the treatment composition in a selected volume into the interior of the pipeline, and (B) continuously introducing the treatment composition at a selected rate into the interior of the interior of the pipeline. The composition is allowed to act upon the surfaces and materials adhering to the surfaces of the interior of the pipeline.

A method for manufacturing a cover member for electronic devices according to certain embodiments of the present disclosure may comprise: a step for forming a magnesium plate; a step for performing primary CNC processing on the magnesium plate using a predetermined cutting oil; a step for performing a primary pretreatment on the magnesium plate using chromate or micro arc oxidation (MAO); a step for performing a primary surface-treatment on the magnesium plate by bake-coating or electrodeposition coating; a step for performing secondary CNC processing on a first region of the magnesium plate using an alcohol-containing cutting oil; a washing and drying step; a step for performing a secondary pretreatment for preventing oxidation on the first region; and a step for performing a secondary surface-treatment on the first region by bake-coating or electrodeposition coating.

A method for manufacturing a cover member for electronic devices according to certain embodiments of the present disclosure may comprise: a step for forming a magnesium plate; a step for performing primary CNC processing on the magnesium plate using a predetermined cutting oil; a step for performing a primary pretreatment on the magnesium plate using chromate or micro arc oxidation (MAO); a step for performing a primary surface-treatment on the magnesium plate by bake-coating or electrodeposition coating; a step for performing secondary CNC processing on a first region of the magnesium plate using an alcohol-containing cutting oil; a washing and drying step; a step for performing a secondary pretreatment for preventing oxidation on the first region; and a step for performing a secondary surface-treatment on the first region by bake-coating or electrodeposition coating.

The present application provides azeotrope or azeotrope-like compositions comprising dimethyl carbonate and a perfluoroheptene ether or a perfluoropentene ether, wherein the perfluoroheptene ether or perfluoropentene ether is present in the composition in an amount effective to form an azeotrope composition or azeotrope-like composition with the dimethyl carbonate. Methods of using the composition provided herein in cleaning and carrier fluid applications are also provided.