| 摘要 |
PURPOSE:To obtain an oxygen permeable polymer molded body excellent in film forming property, having large oxygen transmission coefficient and extremely excellent in the transmission coefficient ratio of oxygen and nitrogen, by using a polymer obtained by the radical polymerization and copolymerization of fumaric diester. CONSTITUTION:A polymer, which is obtained by radical polymerization of 1,3- dimethylbutyl-alkyl fumarate represented by formula (wherein R is an 1-12C alkyl group or a 3-12C cycloalkyl group) or the radical copolymerization of said compound and a vinyl compound having a polymerizable double bond in the molecule thereof, is used. It is necessary to contain 80wt% or more of the fumarate component. Further, a number average MW is pref. about 8,000- 300,000 and the polymer is used by forming the same into a membrane with a thickness of 0.01-200mum by a proper method. Oxygen transmission coefficient is 10<-9>cm<3>cm/cm<2>seccmHg or more and the transmission coefficient ratio of oxygen and nitrogen is 2.8 or more. |
