| 摘要 |
PCT No. PCT/EP94/03978 Sec. 371 Date Jun. 12, 1996 Sec. 102(e) Date Jun. 12, 1996 PCT Filed Nov. 30, 1994 PCT Pub. No. WO95/16723 PCT Pub. Date Jun. 22, 1995Glycerol, 2,2-dimethyl-1,3-dioxolane-4-methanol (Solketal), glycidol or glycerol carbonate is polymerized into preponderantly linear oligomers at 150 DEG C. to 350 DEG C. in the presence of anionic clay material, preferably hydrotalcite, as a catalyst. |
