| abstract |
Cleaning agents are disclosed for removing contaminants that occur during polymerization, containing: a) 0.5 to 20% by weight of butyrolactone b) 0.1 to 5% by weight of 2-ethylhexyl acetate, c) 1.0 to 40% by weight of 2-(2-ethoxyethoxy)ethanol d) 40 to 60% by weight of dimethyl sulfoxide and e) 0.1 to 5% by weight of additives, such impurities often occurring in processes involving polyurethane polymerisation. |