Method of making liquid crystal material including polymerizing dispersion of prepolymer and liquid crystal which is immiscible in the prepolymer
US5335101A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 1993 |
| Grant date | Aug 2, 1994 |
| Priority date | — |
| Expiry date | May 6, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/544
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An encapsulated liquid crystal material which comprises a liquid crystal composition dispersed in a containmant medium and is responsive to an applied electric field to transform from a first visual state to a second visual state is made by: (a) providing a liquid crystal composition having an ordinary and an extraordinary refractive index; (b) providing a prepolymer material in which the liquid crystal composition is substantially immiscible and which is polymerizable into a containment medium having a refractive index which is substantially matched with the ordinary refractive index of the liquid crystal composition; (c) forming a dispersion of the liquid crystal composition in the prepolymer material, the dispersion having a mean volume diameter of less than 20 .mu.m; and (d) polymerizing the prepolymer material to form the encapsulated liquid crystal material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.