| 摘要 |
<p>The invention relates to a polyurethane remover for different background materials, and consists of a gamma -lactone with a weight percentage of 20-80 %, and/or a compound of a gamma -lactone and methylamine with total weight percentage of the compound 20-80 %, and a diethylene glycol ether or diglycol monoether or diacetone alcohol and a non-ionic tenside for emulsification with a weight percentage of 1-8 %, and a thickener for viscosity increase with a weight percentage of 0.1-1 %, or an amino alcohol with a weight percentage of 2-75 %, and a diethylene gloycol monoether or ethylene gloycol monoether, and a thickener for viscosity increase with a weight percentage of 0.1-1 %.</p> |
