New liquid crystal polymers with unusual macromolecular structure were prepared by copolymerization of a fluorinated vinylcyclopropane (1) with methyl methacrylate (2). The copolymers pol(1-co-2) formed a mesophase despite the high dilution of the perfluorinated side chains along the polymer main chain. The onset of mesomorphism, is attributed to the microphase separation of the incompatible fluorocarbon-hydrocarbon components.
Dental material with unusual fluorine distribution
申请人:Ivoclar Vivadent AG
公开号:EP1741419B1
公开(公告)日:2009-02-25
Dental materials with unusual fluorine distribution
申请人:Moszner Norbert
公开号:US20060287458A1
公开(公告)日:2006-12-21
A composition comprising (A) at least one fluorinated vinylcyclopropane according to Formula (I)
wherein R
1
is H or —CO—O—(CH
2
CH
2
)
p
—R
7
; R
2
is H or forms together with R
6
a —CH
2
—C(R
9
) (R
10
)—CH
2
— residue; R
3
is H; R
4
is H or forms together with R
5
a —CH
2
—C(R
9
) (R
10
)—CH
2
— residue; R
5
is H, —CO—O—R
8
, —CO—O— (CH
2
CH
2
)
p
—R
7
or forms together with R
4
a —CH
2
—C (R
9
) (R
10
)—CH
2
— residue; R
6
is H, —CO—O—R
8
, —CO—O— (CH
2
CH
2
)
p
—R
7
or forms together with R
2
a —CH
2
—C(R
9
) (R
10
)—CH
2
— residue; R
7
is perfluorinated C
2
-C
20
aliphatic or alicyclic group; R
8
is H, phenyl, benzyl, or a linear or branched C
1
-C
12
aliphatic or alicyclic group; R
9
is a H, benzoyl, acetyl or a C
1
-C
5
-alkyl group; R
10
H or a —CO—O—R
8
; p is 1, 2, 3, or 4, provided that the compound of Formula (I) comprises at least one —CO—O—(CH
2
CH
2
)
p
—R
7
residue; (B) at least one non-fluorinated vinylcyclopropane derivative; (C) a bisphenol-A-ether di(meth)acrylate according to Formula (II)
wherein R
18
is H or CH
3
, R
19
is CH
3
or CF
3
, Y is a C
2
-C
5
-alkylen residue which can be substituted by an OH group or is preferably unsubstituted.