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Silicone composition and polymer dispersed liquid crystal

A technology of composition and siloxane, which is applied in the direction of liquid crystal materials, chemical instruments and methods, and can solve problems such as unavailability

Inactive Publication Date: 2006-11-29
DOW CORNING CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this material cannot be used in optoelectronic devices that transmit light that has a different phase from the incident light

Method used

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  • Silicone composition and polymer dispersed liquid crystal
  • Silicone composition and polymer dispersed liquid crystal
  • Silicone composition and polymer dispersed liquid crystal

Examples

Experimental program
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Embodiment 1

[0091] A curable silicone composition was prepared by thoroughly mixing the following components in an amber bottle: 24.23 g consisting essentially of 70 mol% PhMeSiO 2 / 2 unit, 27mol% Me 2 SiO 2 / 2 unit and 3mol% Me 2 ViSiO 1 / 2 A dimethylvinylsiloxy-terminated organopolysiloxane composed of units, wherein the organopolysiloxane has a number average molecular weight of 6,161 and a weight average molecular weight of 11,320; 1.002 g has the chemical formula CH 3 CH 2 C(CH 2 CO 2 CH 2 CH 2 SH) 3 and 0.218 g of Darocur 4265 (BASF Corporation), a compound consisting of 50% 2-hydroxy-2-methyl-1-phenyl-propan-1-one and 50% 2,4,6-tris Photoinitiator composed of tolyldiphenylphosphine oxide. The silicone composition (0.409 g) was combined with 0.055 g of Dow Corning 705 Fluid, a mixture of 90% trimethylpentaphenyltrisiloxane and 10% tetramethylhexaphenyltetrasiloxane and 0.111 g of liquid crystal E7 (MerckNB-SC, UK), a mixture of 51% 4-pentyl-4'-cyanobiphenyl, 25% 4-heptyl-4'-...

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Abstract

A silicone composition comprising a liquid crystal containing two para-phenylene groups and a compatibilizer, and a polymer dispersed liquid crystal (PDLC) prepared by a method comprising curing the aforementioned silicone composition, wherein the PDLC is transparent and has a refractive index of from 1.42 to 1.6 at 25 DEG C for light having a wavelength of 589 nm.

Description

technical field [0002] The present invention relates to silicone compositions, and more particularly, to addition-curable silicone compositions comprising two p-phenylene-containing liquid crystals and a compatibilizer. The invention also relates to polymer dispersed liquid crystals (PDLCs) prepared by curing the silicone composition. Background technique [0003] Only a few examples of silicone compositions containing liquid crystals and PDLCs formed from such silicone compositions are known in the art. For example, US Patent No. 5,585,035 to Nerad et al. discloses an optically responsive film comprising liquid crystals dispersed within a polymer matrix containing siloxane linkages. The transmittance of the film at -20°C is substantially the same as that of the film at 20°C, and the V at -20°C 90 is less than 2 times the value at 20°C, where V 90 Refers to the switching voltage required to switch the film between the translucent and transmissive states to achieve a maxim...

Claims

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Application Information

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IPC IPC(8): C09K19/54
CPCC09K19/544C08L83/04
Inventor K·苏J·德格鲁特J·汉宁顿
Owner DOW CORNING CORP
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