Polymerisable liquid crystal material and polymerised liquid crystal film
AssigneeMerck Patent GmbH
InventorsYong-Hyun CHOI, Hyun-Jin YOON, Bjoern SCHNATWINKEL
Life of this patent
Estimating the term…
Abstract
The invention relates to a polymerisable LC material comprising one or more di- or multireactive mesogenic compounds and one or more compounds of formula UVI, wherein the individual radicals have one of the meaning as given in the claims. Furthermore, the present invention relates also to a method for its preparation, a polymer film with improved thermal durability and UV stability obtainable from a corresponding polymerisable LC material, to a method of preparation of such polymer film, and to the use of such polymer film and said polymerisable LC material for optical, electrooptical, decorative or security devices.
Claims20
A polymerizable LC material comprising at least one di- or multireactive mesogenic compound and one or more compounds of formula UVI,
- wherein the individual radicals have the following meanings:
- R1 to R5 denote each independently selected from the group consisting of H, -alkyl, —OH, -alkylaryl, -alkylheteroaryl, -cycloalkyl, cycloheteroalkyl, alkenyl, aryl and —SO3H, and
- R6 and R7 denote each and independently a hydrogen atom, a hydroxy group, or a halogen atom, or R6 and R7 form an optionally substituted cycloalkyl or cycloheteroalkyl ring.
The polymerizable material according to e r ac comprising one or more compounds of formula ND,
- wherein
- U1,2 are independently of each other selected from
- including their mirror images, wherein the rings U1 and U2 are each bonded to the group —(B)q— via the axial bond, and one or two non-adjacent CH2 groups in these rings are optionally replaced by 0 and/or S, and the rings U1 and U2 are optionally substituted by one or more groups L,
- L has on each occurrence identically or differently one of the meanings given for L1 in formula DRM,
- Q1,2 are independently of each other CH or SiH,
- Q3 is C or Si,
- B is in each occurrence independently of one another —C≡C—, —CY1═CY2— or an optionally substituted aromatic or heteroaromatic group,
- Y1,2 are independently of each other H, F, Cl, CN or R0,
- q is an integer from 1 to 10, preferably 1, 2, 3, 4, 5, 6 or 7,
- A1-4 are independently of each other selected from non-aromatic, aromatic or heteroaromatic carbocyclic or heterocyclic groups, which are optionally substituted by one or more groups R5, and wherein each of -(A1-Z1)m—U1—(Z2-A2)n- and -(A3-Z3)o—U2—(Z4-A4)p- does not contain more aromatic groups than non-aromatic groups and preferably does not contain more than one aromatic group,
- Z1-4 are independently of each other —O—, —S—, —CO—, —COO—, —OCO—, —O—COO—, —CO—NR0—, —NR0—CO—, —NR0—CO—NR00—, —OCH2—, —CH2O—, —SCH2—, —CH2S—, —CF2O—, —OCF2—, —CF2S—, —SCF2—, —CH2CH2—, —(CH2)3—, —(CH2)4—, —CF2CH2—, —CH2CF2—, —CF2CF2—, —CH═CH—, —CY1═CY2—, —CH═N—, —N═CH—, —N═N—, —CH═CR0—, —C≡C—, —CH═CH—COO—, —OCO—CH═CH—, CR0R00 or a single bond,
- R0 and R00 are independently of each other H or alkyl with 1 to 12 C— atoms,
- m and n are independently of each other 0, 1, 2, 3 or 4,
- and p are independently of each other 0, 1, 2, 3 or 4,
- R1-5 are independently of each other identical or different groups selected from H, halogen, —CN, —NC, —NCO, —NCS, —OCN, —SCN, —C(═O)NR0R00, —C(═O)X0, —C(═O)R0, —NH2, —NR0R00, —SH, —SRO, —SO3H, —SO2R0, —OH, —NO2, —CF3, —SF5, P-Sp-, optionally substituted silyl, or carbyl or hydrocarbyl with 1 to 40 C atoms that is optionally substituted and optionally comprises one or more hetero atoms, or denote P or P-Sp-, or are substituted by P or P-Sp-, wherein the compounds comprise at least one group R1-5 denoting or being substituted by P or P-Sp-,
- P is a polymerisable group,
- Sp is a spacer group or a single bond,
Dependencies are inferred from the claim text.