A dye composition dissolvable within a liquid crystal host device (including: polymer dispersed liquid crystal, polymer network liquid crystal, polymer stabilized liquid crystal, liquid crystal displays and similar devices), comprising eutectic mixtures of dichroic metallomesogen molecules. The aforesaid metallomesogen molecules comprise chromophore groups synthesized by physical and chemical mixing methods.
The ultraviolet absorption characteristics of a polymer material are modified by the addition of an ultraviolet absorbing dye to render it laser ablatable at a frequency at which the unmodified material is substantially non-laser ablatable.
Polymer stabilized liquid crystals and flexible devices thereof
申请人:Sniaricerche S.C.P.A.
公开号:EP0747461A1
公开(公告)日:1996-12-11
The present invention is directed to a method for manufacturing polymer stabilized liquid crystals liquid crystals on large flexible films by lamination wherein the polymer stabilized liquid crystals contain microparticles or microspacers. Also, a method for manufacturing polymer stabilized liquid crystals on large flexible films by lamination of substrates having a replicated structure is provided. Polymer-free liquid crystals may also be used in some of the methods of the invention.
Process and materials for highly transparent polymer dispersed liquid crystals
申请人:Sniaricerche S.C.P.A.
公开号:EP0787782A2
公开(公告)日:1997-08-06
The present invention relates to a process for making a polymer dispersed liquid crystal material comprising: (a) mixing a liquid crystal material with an oligomer; (b) partially curing the resulting mixture of step (a); (c) thermally inducing phase separation of the resulting mixture of step (b); and (d) post curing the resulting polymer dispersed liquid crystal matrix of step (c), to complete phase separation.
Chiral anisotropic thermosets (cat) in polymer stabilized liquid crystals
申请人:Sniaricerche S.C.P.A.
公开号:EP0803525A2
公开(公告)日:1997-10-29
The present invention relates to chiral anisotropic thermosetting resin comprising the reaction product of a liquid crystalline epoxy prepolymer and a chiral curing agent selected from the group consisting of chiral polyamines and chiral polycarboxylic acids. The invention is also directed to polymer dispersed liquid crystal composite containing a polymer continuous phase and a liquid crystal discontinuous phase characterized in that the polymer continuous phase contains a chiral anisotropic thermosetting resin comprising the reaction product of a liquid crystalline epoxy prepolymer and a chiral polycarboxylic acid curing agent as a compatible component of that phase. Methods of manufacturing the above polymer dispersed liquid crystal composites are also described.