Solvent Mixture for Removing Polyurethane Coatings

摘要

The present invention concerns itself with a solvent mixture that is especially adapted for dissolving and removing polyurethane synthetic resins in the form of coatings, foamed encapsulants, paints and insulation foams. The solvent mixture is effective in removing polyurethane compounds strictly through solvent activity without the need for an additional abrading or grinding action which often results in inflicting excessive damage to polyurethane coated, electronic components. The solvent solution consists essentially of a mixture of dichloromethane, dimethyl formamide and methanol. The solvent mixture's effectiveness appears to reside in its ability to achieve slight solvation with maximum swelling. This affects the adhesive bond of the polyurethane compound thereby facilitating easy removal with little or no damage to the polyurethane coated subsrate or electronic component.