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.
US7595354B2
申请人:——
公开号:US7595354B2
公开(公告)日:2009-09-29
Effects of chemical variations on the mesophase behavior of new fluorinated poly(vinylcyclopropane)s
Several new structures of fluorinated polymers poly(1)–poly(9) were prepared by free radical ring opening polymerization of vinylcyclopropane monomers 1–9 containing different fluorinatedside groups of the type (CH2)n(CF2)pF. While in poly(1)–poly(3) p varied from 6 to 10 for a fixed n=2, in poly(4)–poly(6) n increased from 3 to 5 at the given p=8. In poly(7) and poly(8) a phenyl ring was incorporated