申请人:Bruchmann Bernd
公开号:US20090281274A1
公开(公告)日:2009-11-12
Hyperbranched polycarbonates having stabilizing groups, prepared by reaction of
(a) at least one compound having at least three alcoholic hydroxyl groups per molecule with
(b) at least one reagent of the general formula I
(c) and at least one reagent of the general formula X
3
-(A
1
)
m
-X
4
,
where the variables are defined as follows:
X
1
, X
2
are identical or different and are selected from among halogen, C
1
-C
10
-alkoxy, C
6
-C
10
-aryloxy and O—C(═O)-halogen,
X
3
is a functional group selected from among OH, SH, NH
2
, NH—C
1
-C
4
-alkyl, iso-cyanate, epoxy, COOH, COOR
12
, C(═O)—O—C(═O), C(═O)—Cl,
R
12
is C
1
-C
4
-alkyl or C
6
-C
10
-aryl,
A
1
is a spacer or a single bond,
m is zero or one.
X
4
is a group selected from among phenol groups, benzophenones, aromatic amines and nitrogen-comprising heterocycles, in each case substituted or unsubstituted.