| abstract |
The present invention relates to comprise the embolism materials of the radiopaque polymer beads of globular, homogenizing and basic atresia; described polymer beads is based on the radiopaque monomer of at least a hydrophilic monomer and at least a general formula (I); in the general formula (I), R is H, methyl or ethyl, and Rn 1 Be I, Br or formula (II); In the formula (II), Rn 2 Be O, NH, O-[CHn 2 -CHn 2 -O]n p -C (O)-, O-[CHn 2 ]n m -O-C (O)-, O-[CHn 2 ]n p -, NH-[CHn 2 -CHn 2 -O]n p -C (O)-, NH-[CHn 2 ]n m -O-C (O)-or NH-[CHn 2 ]n p -, m＞and p 〉=1 wherein, Rn 3 For I or Br and n are 1,2 or 3, the content of iodine and/or bromine is at least 5% weight of described granule dry weight.Described granule mean diameter is at least 10 μ m, and can absorb water to and make particle volume increase at least 10%. |