CLEANING SOLUTION
First Claim
1. A cleaning solution comprising one or more solvents selected from the group consisting of acetoacetates, alcohols, glycol ethers, glycol esters, terpenes, and water;
- whereina) the cleaning solution is free of surfactants;
b) the relative evaporation time (RET) of the solvents is less than or equal to 60 seconds;
c) the ratio of RET of the solvents to the radius of the sphere of solubility of the resin (R) of the ink or coating to be removed is less than or equal to 6; and
wherein the cleaning solution removes residual inks and coatings from a surface.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention provides cleaning solutions for removing ink, coating, varnish, adhesive, etc. residue from printing equipment. The cleaning solutions of the present invention comprise one or more solvents, preferably selected from acetoacetates, alcohols, glycol ethers, glycol esters, terpenes, and water, and are preferably free of surfactants. The cleaning solutions of the invention have a relative evaporation time (RET) of less than 60 seconds, and a ratio of the RET to the radius of the sphere of solubility of the resin in the ink to be removed of less than 6.
-
Citations
13 Claims
-
1. A cleaning solution comprising one or more solvents selected from the group consisting of acetoacetates, alcohols, glycol ethers, glycol esters, terpenes, and water;
-
wherein a) the cleaning solution is free of surfactants; b) the relative evaporation time (RET) of the solvents is less than or equal to 60 seconds; c) the ratio of RET of the solvents to the radius of the sphere of solubility of the resin (R) of the ink or coating to be removed is less than or equal to 6; and wherein the cleaning solution removes residual inks and coatings from a surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method of formulating a cleaning solution comprising:
-
a) determining the radius of the sphere of solubility of the resin (R) of the ink or coating from the Hansen solubility parameters of the resin; and b) mixing one or more solvents, each independently selected from the group consisting of acetoacetates, alcohols, glycol ethers, glycol esters, terpenes, and water, to produce a solvent blend, wherein; i. the RET of the solvent blend is less than or equal to 60 seconds; and ii. the ratio of RET to R is less than or equal to 6; wherein the cleaning solution is free of surfactants; and wherein the cleaning solution removes residual inks and coatings from a surface.
-
Specification