| 摘要 |
1430164 Porous ion-exchanging shaped articles BASF AG 1 Aug 1973 [2 Aug 1972] 36519/73 Headings C3C and C3P Porous ion-exchanging shaped articles are prepared by mixing (1) a particulate cross-linked polymer obtained by dispersion polymerization of styrene, a styrene derivative of acenaphthylene in the presence of 1 to 20 weight per cent of an aromatic divinyl compound and (2) an olefin polymer in the presence of (3) an inert organic liquid of low volatility, forming the mixture into shaped articles and introducing ion-exchange groups into the mixture after shaping the inert liquid being removed after shaping. The crosslinked polymer may be derived from styrene, methyl styrene, acenaphthylene or a mixture of styrene with methyl styrene, stilbene or acenaphthylene, together with divinyl benzene; and may be mixed with a polymer of a C 2-6 olefin. The mixture may be formed into fibres, fabrics or membranes and ion-exchanging groups introduced by sulphonation or by chloromethylation and amination. The inert liquid may be tetralin, decalin, anthracene, acenaphthene, diphenyl, C 10-40 alkanes, adipate or phthalate esters, camphor or oleic, stearic or palmitic acid. After shaping it may be extracted, e.g. with methanol, acetone or light naphtha to give microporous articles. In examples (1) cross-linked polystyrene is mixed with polyethylene in tetralin and after shaping into fibres the tetralin is extracted with boiling methanol and ion-exchange groups are introduced by sulphonation, (2) cross-linked polystyrene is mixed with polypropylene in paraffin oil and after shaping into fibres the paraffin oil is extracted with boiling acetone and ion-exchange groups are introduced by sulphonation, and (3) fibres as in (2) are chloromethylated and aminated. |
