Patent ID: 6203723
Filing Date: 2001-03-20
Classification: C09K

Abstract:
A composition for use in preparing microencapsulated liquid crystal material, comprising (A) a liquid crystal; (B) a capsule wall forming material including (1) a polyisocyanate, a water soluble polyol or a polyamine, or (2) a melamine fromaldehyde or a urea formaldehyde, and; (C) a polymer network forming material including, a prepolymer of urethane acrylate, acrylate or ally derivative; and (D) a photoinitiator, wherein the prepolymer of acrylate or ally derivative is selected from the group consisting of 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, di(ethylene glycol) diacrylate, di(ethylene glycol) dimethacrylate, trimethylolpropane trimethacrylate, pentaerythritol triacrylate, pentaerythritol tetramethacrylate, 1,4-butanediol diacrylate, 1,4-buthanediol dimethacrylate, 1,6-hexanediol diacrylate, 1,6-hexanediol dimethacrylate, tri(ethylene glycol) diacrylate, tri(ethylene glycol) dimethacrylate, bis(allyl carbonate), trimethylolpropane diallylether, 2,4,6-triallyoxy-1,3,5-triazine, epoxy acrylate, liquid crystal acrylate and mixtures thereof.