IMPRESSION COMPOSITION

摘要

#CMT# #/CMT# Transparent molded part (I) comprises a sheet-like substrate and, provided on a major surface of the substrate, a layer having a layer thickness of 3-300 mu m and consisting of a solvent-free polymerized composition containing 35-75 wt.% of at least one partially fluorinated acrylate, 24.9-60 wt.% of at least one non-fluorinated acrylate, and 0.1-5 wt.% of at least one photoinitiator, where the layer has a surface structure with diffractive surface elements having a maximum structural size of defects of such surface elements of up to 100 nm on the surface facing away from the substrate. #CMT# : #/CMT# Transparent molded part (I) comprises a sheet-like substrate and, provided on a major surface of the substrate, a layer having a layer thickness of 3-300 mu m and consisting of a solvent-free polymerized composition containing 35-75 wt.% of at least one partially fluorinated acrylate, 24.9-60 wt.% of at least one non-fluorinated acrylate, and 0.1-5 wt.% of at least one photoinitiator, where the layer has a surface structure with diffractive surface elements having a maximum structural size of defects of such surface elements of up to 100 nm on the surface facing away from the substrate, and the composition contains luminescent pigments. Independent claims are included for: (1) pressureless process for the preparation of (I) comprising: providing a negative casting mold with shapings of surface elements; introducing the impression composition into the negative casting mold in an amount exceeding the shapings of the surface elements; applying a substrate to the exposed surface of the impression composition; polymerizing the impression composition to bond the layer of the impression composition with the substrate for preparing a molded part; and removing the finished molded part from the negative casting mold; and (2) impression composition comprising: 35-75 wt.% of least one partially fluorinated acrylate; 24.9-60 wt.% of at least one non-fluorinated acrylate; and 0.1-5 wt.% of at least one photoinitiator, where the composition contains luminescent pigments. #CMT#USE : #/CMT# (I) and the composition are useful in daylight luminescent paints, luminous (printing) inks, instrument displays, TV picture tubes, X-ray and radar screens, luminescent badges, security or signal paints for protective garments and optical brighteners. (I) is useful as security feature on flexible or rigid carriers, preferably banknotes. #CMT#ADVANTAGE : #/CMT# The impression composition has improved optical quality and mechanical loadability, and is free from solvents. #CMT#ORGANIC CHEMISTRY : #/CMT# Preferred Components: The photoinitiators are present at 1-2 wt.%. (I) has a viscosity of 2-30 mPa.s, and a density of 1-1.5 g/ml. The luminescent pigments are after glowing or luminous phosphors. The luminescent pigments are present at 0.01-50 wt.%, preferably 1-10 wt.%. #CMT#POLYMERS : #/CMT# Preferred Components: The partially fluorinated acrylate is linear, branched and/or cyclic, and the carbon atoms adjacent to the acrylate functionality are not fluorinated; or a perfluoroalkylethyl acrylate, where the ethyl group is not fluorinated and the perfluorinated alkyl radical has 4-10C. The partially fluorinated acrylate is present at 50-65 wt.%, preferably 55-60 wt.%. The non-fluorinated acrylate is present at 34.9-45 wt.%. (I) comprises a single liquid phase.