乙酸乙酯 → 乙酸乙烯酯

To 100 g of the same copolymer was added 1500 ml of ethyl acetate, 40 ml of concentrated ammonium hydroxide and 40 ml of water. After two days with stirring, the polymer dissolved to give a gel. During the next three weeks at room temperature, a progressive decrease in viscosity of the solution was noted. At this time the solution was heated to remove ammonia, giving a partially saponified polymer of composition 32.4 wt % vinyl acetate, 16.4 wt % vinyl alcohol, 38 wt % TFE, and 13.2 wt % HFP in a 27.4 wt % solids solution in ethyl acetate.

1. dissolutionthe polymer dissolved
2. customto give a gel
3. customDuring the next three weeks
4. customat room temperature
5. temperatureAt this time the solution was heated
6. customto remove ammonia

ORD记录

ord-daa2e4e30ef942c09a4a540a3956b1ac

来源数据集

uspto-grants-1998_03

DOI

10.6084/m9.figshare.5104873.v1

专利号

US05723556