| 摘要 |
The material (I) with an absorbency for 10% aq. chloride of at least 3 g/g of dry (I) or salt, comprises sulphonated hydrocarbon residues prepd. by sulphonating a porous, crosslinked polymeric material with a pore vol. greater than 3.0 up to 99.5 cc/g. Also claimed is a process for preparing a homogenous (I). - Pref. (II) has a pore vol. of 8-99.5 pref. greater than 35 cc/g and at least 15% of its monomers all capable of being sulphonated. (I) has a degree of sulphonation greater than (15) (60) pref. above 85% styrene equiv. which is related to pore vol. and a degree of crosslinking which is related to pore vol., of 0.5-8 (less than 10) pref. 5-20%. (Dwg.0/0) EPAB- EP-105634 B A sulphonated, porous, cross-linked polymeric material comprising sulphonated, hydrocarbon residues prepared by sulphonating a porous, cross-linked polymeric material, which has been prepared from monomers at least 15% of which are capable of being sulphonated, characterised by having a pore volume in the range greater than 3.0 up to 99.5 cm3/g, the sulphonated material having an absorbency for 10% aqueous chloride of at least 3 g/g of dry sulphonated material or salt thereof. (Dwg.0/0) USAB- US4536521 A Sulphonated porous crosslinked polymeric material is prepd. by polymerising vinyl monomers in a water-in-oil high internal phase emulsion, such that 90 wt.% or more of the emulsion is water. Polymeric structure has pore vol. is 8-99.5 cc. per g., and is then sulphonated to absorbency for 10% aq. chloride of 3 g. per g. or more of dry sulphonated material or its salt. - Pref. degree of sulphonation is more than 15% styrene equiv., such that 15% or more of the monomers to be polymerised can be sulphonated. |
