No VOC solvent blend
View Patent ↗A solvent blend effective to remove grease and oil includes a hydro treated light petroleum distillate in combination with a glycol ether and an ester solvent. Each of the components has a vapor pressure of less than 0.1 mm Hg at 20° C. and accordingly contained no volatile organic compounds. These effectively remove grease and oil and can be emulsified into water to form an aqueous cleaning composition.
1. A solvent blend having a vapor pressure less than 0.1 mm Hg at 20° C. comprising
30% to 60% by weight of a petroleum distillate having a vapor pressure of less than 0.1 mm Hg at 20° C.;
20% to 50% by weight of a glycol ether soluble in said petroleum distillate and having a vapor pressure of less than 0.1 mm Hg at 20° C.;
at least 10% by weight of a C 1 –C 4 ester having a carbon chain length less than 18 and having a vapor pressure of less than 0.1 mm Hg at 20° C.
2. The solvent blend claimed in claim 1 wherein said petroleum distillate is a hydro treated light petroleum distillate.
3. The solvent blend claimed in claim 1 wherein glycol ether is selected from the group consisting of propylene glycol n-butyl ether, propylene glycol n-propyl ether, diethylene glycol monobutyl ether, ethylene glycol monobutyl ether, dipropylene glycol methyl ether, tripropylene glycol methyl ether, dipropylene glycol n-propyl ether, dipropylene glycol mono n-butyl ether, tripropylene glycol mono n-butyl ether, propylene glycolphenyl ether and propylene glycol n-butyl ether, and blends thereof.
4. The solvent blend claimed in claim 1 wherein said ester is a methyl ester.
5. The solvent blend claimed in claim 1 wherein said ester is a monobasic ester.
6. The solvent blend claimed in claim 1 wherein said ester has a carbon length of 12 or less.