申请人:BIOCOMPATIBLES UK LIMITED
公开号:US20210015963A1
公开(公告)日:2021-01-21
The present disclosure relates to radiopaque PVA polymers where the PVA has a first pendant group and a second pendant group, wherein the first pendant group comprises a first phenyl group bearing 1 to 5 iodine atoms, and the second pendant group comprises either (a) a second phenyl group bearing 1 to 3 substituents selected from the group W and optionally 1 to 4 iodine substituents, the group(s) W and the optional iodines being the sole substituents of the second phenyl group. Each W is selected from —OH, —COOH, —SO
3
H, —OPO
3
H
2
, —O—(C
1-4
alkyl), —O—(C
1-4
alkyl)OH, —O—(C
1-4
alkyl)R
2
, —O—(C
2
H
5
O)
q
R
1
—(C═O)—O—C
1-4
alkyl and —O—(C═O)C
1-4
alkyl; wherein R
1
is H or C
1-4
alkyl; R
2
is —COOH, —SO
3
H, or —OPO
3
H
2
; q is an integer from 1 to 4; wherein the group W may be in the form of a pharmaceutically acceptable salt; or (b) a pyridyl group; which is optionally in the form of a pyridinium ion.