| 摘要 |
1300974 Trioxan polymerization catalyst composition BADISCHE ANILIN- & SODAFABRIK AG 17 April 1970 [18 April 1969] 18368/70 Heading C3P [Also in Division B1] Trioxan is homo- or co-polymerized, e.g. a liquid mixture of 97 wt. per cent trioxan, 2À85% 1,3 - dioxacycloheptane and 0-15% butanol is polymerized at 60‹ C., by the addition as catalyst of a mixture of HF and HBF 4 , e.g. in Bu 2 O and C 6 H 6 . The 1,3-dioxacycloheptane may be replaced by 1,3-dioxolan. |
