申请人:McKenna Peter
公开号:US20110092659A1
公开(公告)日:2011-04-21
A process for the production of a tinted polymer, which comprises co-polymerising a compound of the general formula I or a salt thereof with a polymerisable monomer containing a vinyl group, formula I being:
in which R represents a hydrogen atom or an —SO
3
H group; A represents a direct bond, -alkylene-O—, or a -phenylene-NH— or -phenylene-NH-phenylene-NH— group in which the or each phenylene ring may be optionally substituted by one or more of the same or different groups selected from —SO
3
H, —(CH
2
)
m
SO
3
H, —SO
2
(CH
2
)
m
SO
3
H, —SO
2
NH(CH
2
)
m
SO
3
H, —SO
2
C
1-2
alkyl, —SO
2
C
1-2
haloalkyl, —SO
2
NHC
1-2
alkyl, —SO
2
NHC
1-2
haloakyl, —C
1-2
alkyl, or C
1-2
haloalkyl, in which m represents 1 or 2; R
1
represents a hydrogen or halogen atom or a C
1-4
alkyl group; and each of R
2
and R
3
, which may be the same or different, represents a hydrogen atom or a C
1-4
alkyl or alkoxy group; with the proviso that, if R
1
represents a hydrogen or a C
1-4
alkyl group and simultaneously R represents a hydrogen atom, A must represent a -phenylene-NH— or -phenylene-NH-phenylene-NH- group in which at least one phenylene ring is substituted by at least one sulfur-containing group.