WO2006128091 MULTILAYER LAMINATES COMPRISING TWISTED NEMATIC LIQUID CRYSTALS

Provided are multilayer laminates having one or more layers comprising twisted nematic liquid crystals and one or more layers of a polymeric sheet comprising a polymer with a modulus of 20,000 psi (138 MPa) or less. The twisted nematic liquid crystal layers reflect infrared radiation. Thus, the multilayer laminates are useful to reduce the transmission of infrared energy. For example, in some embodiments the multilayer laminates are useful as windows to reduce energy consumption necessary to cool the interior of a structure such as an automobile or building. Preferably, the multilayer laminates retain the beneficial properties of safety glass. The multilayer laminates may include additional layers such as infrared absorbing layers, half wave plates, and the like, to minimize the transmission of infrared energy. The multilayer laminates may also include further additional layers such as polymeric films, polymeric sheets, rigid sheets, and the like.

(FR)

Laminés multicouches constitués d'une ou de plusieurs couches contenant des cristaux liquides nématiques en hélice, et d'une ou de plusieurs couches de feuille polymère renfermant un polymère dont le module est compris entre 20 000 psi (138 MPa) and 100 000 psi (690 MPa). Les couches de cristaux liquides nématiques en hélice reflètent le rayonnement infrarouge. Ces laminés multicouches permettent donc d'atténuer la transmission de l'énergie infrarouge. Dans certains modes de réalisation, par exemple, les laminés multicouches s'utilisent comme vitres pour réduire la consommation d'énergie nécessaire au refroidissement de l'intérieur d'une structure telle qu'une automobile ou un bâtiment. Les laminés multicouches conservent de préférence les propriétés avantageuses du verre de sécurité. Ils peuvent inclure des couches supplémentaires telles que des couches d'absorption des infrarouges, des lames demi-onde et analogues capables de réduire la transmission de l'énergie infrarouge. Les laminés de l'invention peuvent également comporter d'autres couches telles que des films polymères, des feuilles polymères, des feuilles rigides et analogues.

Also published as

EP1885556

CN101184616

AU2006249383

JP2008542065

Latest bibliographic data on file with the International Bureau

B	PERFORMING OPERATIONS; TRANSPORTING
32	LAYERED PRODUCTS
B	LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
17	Layered products essentially comprising sheet glass, or fibres of glass, slag or the like
06	comprising glass as the main or only constituent of a layer, next to another layer of a specific substance
10	of synthetic resin

B	PERFORMING OPERATIONS; TRANSPORTING
32	LAYERED PRODUCTS
B	LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
17	Layered products essentially comprising sheet glass, or fibres of glass, slag or the like
06	comprising glass as the main or only constituent of a layer, next to another layer of a specific substance
10	of synthetic resin

B	PERFORMING OPERATIONS; TRANSPORTING
32	LAYERED PRODUCTS
B	LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
17	Layered products essentially comprising sheet glass, or glass, slag, or like fibres
06	comprising glass as the main or only constituent of a layer, next to another layer of a specific ; material
10	of synthetic resin

B	PERFORMING OPERATIONS; TRANSPORTING
32	LAYERED PRODUCTS
B	LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
17	Layered products essentially comprising sheet glass, or glass, slag, or like fibres
06	comprising glass as the main or only constituent of a layer, next to another layer of a specific ; material
10	of synthetic resin
10005	laminated safety glass or glazing

B	PERFORMING OPERATIONS; TRANSPORTING
32	LAYERED PRODUCTS
B	LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
17	Layered products essentially comprising sheet glass, or glass, slag, or like fibres
06	comprising glass as the main or only constituent of a layer, next to another layer of a specific ; material
10	of synthetic resin
10005	laminated safety glass or glazing
10009	characterized by the number, the constitution or treatment of glass sheets
10018	comprising only one glass sheet

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1. WO2006128091 - MULTILAYER LAMINATES COMPRISING TWISTED NEMATIC LIQUID CRYSTALS

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C	CHEMISTRY; METALLURGY
09	DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
K	MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
19	Liquid crystal materials
04	characterised by the chemical structure of the liquid crystal components ; , e.g. by a specific unit
06	Non-steroidal liquid crystal compounds
08	containing at least two non-condensed rings
10	containing at least two benzene rings
20	linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters ; or ethers
2007	the chain containing -COO- or -OCO- groups

G	PHYSICS
02	OPTICS
B	OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5	Optical elements other than lenses
30	Polarising elements
3016	involving passive liquid crystal elements

G	PHYSICS
02	OPTICS
F	DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1	Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01	for the control of the intensity, phase, polarisation or colour
13	based on liquid crystals, e.g. single liquid crystal display cells
137	characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
13718	based on a change of the texture state of a cholesteric liquid crystal

Y	SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10	TECHNICAL SUBJECTS COVERED BY FORMER USPC
T	TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
428	Stock material or miscellaneous articles
24	Structurally defined web or sheet [e.g., overall dimension, etc.]
24942	including components having same physical characteristic in differing degree