| 摘要 |
Novel compounds of the formula <IMAGE> wherein -D- is a methylene group which is a member of an oxetane or a 1,3-dioxane ring, -R- is ethylene or propylene bearing from 0-6 methyl groups and m and n are lower integers. For example, a compound of the formula <IMAGE> is contacted with dilute HCl to give a monomer <IMAGE> which is copolymerized with a diisocyanate to give a copolymer which removes SO2 from gas streams.
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