| 摘要 |
Hydrolytically stable premix compositions for preparation of urethane foams are prepared by employing as the organotin catalyst in such premix composition a di- or tri-alkyltin sulfonate corresponding to the formula R4-n-Sn(O3SR')n wherein R is an alkyl radical of 1 to 8 carbon atoms; R' is an alkyl, phenyl, or alkyl phenyl radical of 1 to 8 carbon atoms and n is 1 or 2. Examples include: dibutyltin bis-methanesulfonate, dibutyltin bis-benzenesulfonate, dimethyltin bis-benzenesulfonate, dimethyltin bis-benzenesulfonate, dioctyltin bis-methanesulfonate and dibutyltin bis-toluenesulfonate. |
