US 8,574,454 B2 · Patternable liquid crystal polymer comprising thio-ether units

Abstract

The present invention relates to a photo-polymerized, patterned or unpatterned liquid crystal polymer, especially a liquid crystal polymer film or a liquid crystal polymer network, comprising thio-ether units of formula (I) * covalent bond, which links the unit of formula (I) to the residue of the polymer wherein LC1 is selected from the group of liquid crystal residues, X1 is selected from the group of aliphatic organic residues, and n1 is an integer ≧0 and m1 is an integer ≧0; with the proviso that if n1 is 0, then m1 is >0, and if m1 is 0, then n1>0; which is prepared in an atmosphere containing oxygen, preferably with an amount of 0.1≦oxygen≦50%, more preferably 1≦oxygen≦25%, most preferably in air; with the proviso that polymer dispersed liquid crystals are excluded. Further, this invention relates to a composition used for the preparation of that photo-polymerized liquid crystal polymer of the invention, to processes of the preparation of that liquid crystal polymer and to its use.

Claims18

Dependent claims

Photo-polymerized, patterned or unpatterned liquid crystal polymer comprising thio-ether units of formula (I)

* covalent bond, which links the unit of formula (I) to the residue of the polymer
wherein
LC1 is selected from the group of liquid crystal residues, representing the polymerized form of a liquid crystal, which has in its un-polymerized form at least two polymerizable unsaturated carbon-carbon bonds, or carbon-nitrogen-bonds, and comprising one or more rod-shaped, board-shaped or disk-shaped mesogenic groups,
X1 is selected from the group of aliphatic organic residues, which are straight-chain or branched, saturated and unsaturated hydrogencarbons, wherein at least one carbon, hydrogen and/or hydrogencarbon may be replaced by a hetereoatom, which is N, S, O, OOC, COO, OCO, OCOO, OOCO or CO, and
n1 is an integer ≧0 and
m1 is an integer ≧0;
with the proviso that if n1 is 0, then m1 is >0, and if m1 is 0, then n1>0;
and
which is prepared in an atmosphere containing oxygen,
with the proviso that polymer dispersed liquid crystals are excluded for LC1.

7 more elements

Process for the preparation of a liquid crystal polymer comprising thio-ether units of formula (I)

* covalent bond, which links the unit of formula (I) to the residue of the polymer
wherein
LC1 is selected from the group of liquid crystal residues, representing the polymerized form of a liquid crystal, which has in its un-polymerized form at least two polymerizable unsaturated carbon-carbon bonds, or carbon-nitrogen-bonds, and comprising one or more rod-shaped, board-shaped or disk-shaped mesogenic groups,
X1 is selected from the group of aliphatic organic residues, which are straight-chain or branched, saturated and unsaturated hydrogencarbons, wherein at least one carbon, hydrogen and/or hydrogencarbon may be replaced by a hetereoatom, which is N, S, O, OOC, COO, OCO, OCOO, OOCO or CO, and
n1 is an integer ≧0 and
m1 is an integer ≧0;
with the proviso that if n1 is 0, then m1 is >0, and if m1 is 0, then n1 >0;
and
which is prepared in an atmosphere containing oxygen,
with the proviso that polymer dispersed liquid crystals are excluded for LC1, said process comprising:
a) applying a composition (XX) comprising:
i) at least one polythiol of formula (IX)
wherein
Xa is an aliphatic organic residue,
nt is an integer ≧2, and
ii) at least one liquid crystal having at least two polymerizable functional groups, and
iii) optionally at least one reactive and/or non-reactive additive(s), and
iv) optionally at least one initiator(s), and
v) optionally at least one solvent(s), and then
b) optionally drying, and then
c) polymerizing the composition, obtained after step a) or step b) in an atmosphere containing oxygen.

18 more elements

Dependencies are inferred from the claim text.

Patternable liquid crystal polymer comprising thio-ether units

Life of this patent

Patternable liquid crystal polymer comprising thio-ether units

Life of this patent

Abstract

Claims18