Patent ID: 7988881

Claim:
A multilayer laminate article for reflecting radiation having a wavelength in the range of 280 to 2500 nm, said article comprising: (a) at least one layer comprising a nonmicellar twisted nematic liquid crystal having cholesteric infrared-reflecting properties; and (b) at least one layer comprising a polymeric sheet; wherein, optionally, said at least one layer of said nonmicellar twisted nematic liquid crystal is in contact with said at least one layer of said polymer sheet; said nonmicellar twisted nematic liquid crystal comprising a compound of formula (I): D-S 1 —(B—S 2 ) m -(A 1 S 3 ) n —R p (I) wherein D is a chiral moiety (D1) or (D2) derived, by formal removal of a hydroxyl group, from the alkaloids selected from the group consisting of (−)-cinchonidine, CAS [485-71-2]; (+)-cinchonine, CAS [118-10-5]; quinine, CAS [130-95-0] and quinidine, CAS [56-54-2]; and their dihydro-derivatives: X is hydrogen or —OCH 3 ; R is —CH═CH 2 or —CH 2 CH 3 ; S 1 is a linking group selected from the group consisting of —O—, —OC(O)—, —OC(O)NH— and —OC(O)O—; S 2 and S 3 are linking groups each independently selected from the group consisting of covalent bond, —O—, —S—, —C(O)—, —OC(O)—, —C(O)O—, —OC(O)O—, —OC(O)NR 1 —, —NR 1 C(O)O—, —SC(O)—, and —C(O)S—; R 1 is hydrogen or C 1 to C 4 alkyl; each B is a divalent radical independently selected from the group consisting of aliphatic and aromatic carbocyclic and heterocyclic groups having 1 to 16 carbon atoms; optionally having one or more fused rings and optionally mono- or polysubstituted with L; L is selected from the group consisting of the substituents F, Cl, —CN, and —NO 2 ; and alkyl, alkoxy, alkylcarbonyl, and alkoxycarbonyl groups, having 1 to 8 carbon atoms, wherein one or more of the carbon atoms are optionally substituted with F or Cl; A 1 is a divalent linear or branched alkyl having 2 to 20 carbon atoms, optionally interrupted by linking groups selected from the group —O—, —S—, —C(O)—, —OC(O)— and —C(O)O—; R p is a polymerizable group; m is an integer of 1 or 2; and n is an integer of 0 or 1.