发明授权
US4687850A Purification of 1-(2-amino-2-alkylpropyl)-3,3,5,5-tetraalkylpiperazinones 失效
纯化1-(2-氨基-2-烷基丙基)-3,3,5,5-四烷基哌嗪酮

Purification of 1-(2-amino-2-alkylpropyl)-3,3,5,5-tetraalkylpiperazinones
摘要:
Novel piperazinones having the formula ##STR1## are useful UV stabilizers and are purified by fractional distillation in the presence of an inorganic base.
信息查询
0/0