A PVC product and a stabilizing agent thereof are provided. The stabilizing agent is composed of perchlorate, alkanolamine, and alkanolamide. The total amount of alkanolamine and alkanolamide in the stabilizing agent is 80-99 wt % of the total weight of the stabilizing agent, and the weight ratio of the total amount of alkanolamine and alkanolamide to the amount of perchlorate is 4:1 to 99:1, so that the PVC product has a lower Yellowness Index (YI) and higher transparency.
A PVC product and a stabilizing agent thereof are provided. The stabilizing agent is composed of perchlorate, alkanolamine, and alkanolamide. The total amount of alkanolamine and alkanolamide in the stabilizing agent is 80-99 wt % of the total weight of the stabilizing agent, and the weight ratio of the total amount of alkanolamine and alkanolamide to the amount of perchlorate is 4:1 to 99:1, so that the PVC product has a lower Yellowness Index (YI) and higher transparency.
US7393887B2
申请人:——
公开号:US7393887B2
公开(公告)日:2008-07-01
Synthesis of Monoaza Crown Ethers from<i>N</i>,<i>N</i>-Di[oligo(oxyalkylene)]amines and Oligoethylene Glycol Di(<i>p</i>-toluenesulfonates) or Corresponding Dichlorides
Monoazacrownethers were prepared in satisfactory yields by the one-step reaction between diethanolamine or N,N-di[oligo(oxyethylene)]amines and oligoethylene glycol di(p-toluenesulfonates) or corresponding dichlorides in t-butyl alcohol/dioxane in the presence of sodium or potassium t-butoxide. The reaction conditions in the preparation of monoaza 15- and 18-crown ethers were studied. Various monoaza