Abstract: Coextruded acrylic foils made from impact-modified polyalkyl (meth)acrylates and laser engravable labels containing these foils. The coextruded acrylic foils are designed for labelling by a laser and contain a contrast layer having at least one inorganic filler and an engraving layer arranged on the contrast layer and having at least one colourant.

Abstract: The present invention relates to novel films for application on materials as protective film in respect of weathering effects. In particular, the present invention relates to a novel film composite which has at least three layers and which features particularly good adhesion on the substrate and particularly good optical properties. The outermost layer here is a layer comprising a fluoropolymer, the middle layer is a PMMA layer comprising at least one UV absorber and/or UV stabilizer, and the innermost layer is a PMMA layer comprising at least one adhesion promoter which improves adhesion on the substrate.

Abstract: Heat resistant brittle films can be made from impact-modified poly(meth)acrylimide, and forgery prevention labels can contain the heat resistant brittle films. The films can be advantageously prepared by extrusion and, depending on the desired purpose, can be designed to be transparent, translucent, or entirely non-transparent, e.g., white. Ideally, the brittle films and the forgery prevention labels containing the brittle films have no intended break points such as slits, perforation, etc.

Abstract: Heat resistant brittle films can be made from impact-modified poly(meth)acrylimide, and forgery prevention labels can contain the heat resistant brittle films. The films can be advantageously prepared by extrusion and, depending on the desired purpose, can be designed to be transparent, translucent, or entirely non-transparent, e.g., white. Ideally, the brittle films and the forgery prevention labels containing the brittle films have no intended break points such as slits, perforation, etc.

Abstract: Brittle acrylic films are made from impact-modified polyalkyl (meth)acrylate and are useful in forgery prevention labels containing the same. The films can be advantageously prepared by extrusion and, depending on the desired purpose, can be designed to be translucent or entirely non-transparent e.g. white. Ideally, the brittle acrylic films and the forgery prevention labels have no intended break points such as slits, perforation etc.

Abstract: The present invention relates to novel films for application on materials as protective film in respect of weathering effects. In particular, the present invention relates to a novel film composite which has at least three layers and which features particularly good adhesion on the substrate and particularly good optical properties. The outermost layer here is a layer comprising a fluoropolymer, the middle layer is a PMMA layer comprising at least one UV absorber and/or UV stabilizer, and the innermost layer is a PMMA layer comprising at least one adhesion promoter which improves adhesion on the substrate.

Abstract: The present invention relates to a method for producing light guide bodies and to their use in lighting units, for example for liquid crystal displays or for monitors. In particular, the present invention relates to a method for producing light guide bodies which have a thickness of at most 1 mm and contain at least 80 wt % of polymethyl methacrylate and no light-scattering constituents.

Abstract: The present invention relates to a method for producing light guide bodies and to their use in lighting units, for example for liquid crystal displays or for monitors. In particular, the present invention relates to a method for producing light guide bodies which have a thickness of at most 1 mm and contain at least 80 wt % of polymethyl methacrylate and no light-scattering constituents.

Abstract: The present invention relates to a laminate comprising at least one thermoplastic substrate and at least one colour layer, wherein the thermoplastic substrate comprises polyamide, to which at least one colour layer comprising polyurethane crosslinking has been applied.

Abstract: The present invention relates to diffuser sheets for LCD applications encompassing at least one light-scattering polymethyl methacrylate layer which comprises a polymethyl methacrylate matrix and also from 0.5 to 59.5% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, of spherical scattering particles (A) whose median size V50 is in the range from 0.1 to 40 ?m, and whose refractive index differs from that of the polymethyl methacrylate matrix by a value in the range from 0.02 to 0.2, and from 0.5 to 59.5% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, of spherical particles (B) whose median size V50 is in the range from 10 to 150 ?m and whose refractive index differs from that of the polymethyl methacrylate matrix by a value in the range from 0 to 0.

Abstract: The present invention relates to rear-projection screens which have at least one scattering layer encompassing scattering particles and has at least one backing layer, characterized in that the halved-intensity angle of the scattering layer is greater than or equal to 15° and the halved-intensity angle of the backing layer is smaller than or equal to 6.5°, where the gloss R60° of the backing layer is smaller than or equal to 70.

Abstract: The present invention relates to rear-projection screens which have at least one scattering layer encompassing scattering particles and has at least one backing layer, characterized in that the halved-intensity angle of the scattering layer is greater than or equal to 15° and the halved-intensity angle of the backing layer is smaller than or equal to 6.5°, where the gloss R60° of the backing layer is smaller than or equal to 70.

Abstract: The present invention relates to a rear-projection screen encompassing at least one light-scattering polymethyl methacrylate layer, which comprises a polymethyl methacrylate matrix and spherical scattering particles (A) and spherical particles (B) with a different median particle size V50, where the spherical scattering particles (A) have a median size V50 in the range from 0.1 to 40 ?m, the difference between the refractive index of the spherical scattering particles (A) and that of the polymethyl methacrylate matrix being in the range from 0.02 to 0.2, where the spherical particles (B) have a median size V50 in the range from 10 to 150 ?m, the difference between the refractive index of the spherical particles (B) and that of the polymethyl methacrylate matrix being in the range from 0 to 0.

Abstract: The present invention relates to diffuser sheets for LCD applications encompassing at least one light-scattering polymethyl methacrylate layer which comprises a polymethyl methacrylate matrix and also from 0.5 to 59.5% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, of spherical scattering particles (A) whose median size V50 is in the range from 0.1 to 40 ?m, and whose refractive index differs from that of the polymethyl methacrylate matrix by a value in the range from 0.02 to 0.2, and from 0.5 to 59.5% by weight, based on the weight of the light-scattering polymethyl methacrylate layer, of spherical particles (B) whose median size V50 is in the range from 10 to 150 ?m and whose refractive index differs from that of the polymethyl methacrylate matrix by a value in the range from 0 to 0.

Abstract: The present invention relates to a rear-projection screen encompassing at least one light-scattering polymethyl methacrylate layer, which comprises a polymethyl methacrylate matrix and spherical scattering particles (A) and spherical particles (B) with a different median particle size V50, where the spherical scattering particles (A) have a median size V50 in the range from 0.1 to 40 ?m, the difference between the refractive index of the spherical scattering particles (A) and that of the polymethyl methacrylate matrix being in the range from 0.02 to 0.2, where the spherical particles (B) have a median size V50 in the range from 10 to 150 ?m, the difference between the refractive index of the spherical particles (B) and that of the polymethyl methacrylate matrix being in the range from 0 to 0.

Abstract: A rear-projection screen that has at least one light-scattering polymethyl methacrylate layer in which is embedded spherical plastic particles; the previously described rear-project screen that has an additional plastic sheet that does not have embedded scattering beads; and a method of making a rear-projection screen.

Abstract: Abstract of the Disclosure The present invention relates to rear-projection screens encompassing at least one light-scattering polymethyl methacrylate layer of thickness in the range from 0.05 to 4 mm comprising spherical particles whose size is in the range from 5 to 35 µm, at a concentration in the range from 2 to 60% by weight, based on the total weight of the light-scattering polymethyl methacrylate layer, the refractive index of the spherical plastics particles differing from that of the polymethyl methacrylate matrix by a value in the range from 0.02 to 0.2, wherein the concentration of the spherical plastics particles cP, the thickness of the light-scattering polymethyl methacrylate layer dS, and the size of the spherical plastics particles DP is selected in such a way that the ratio cP*dS/DP3 is in the range from 0.0015 to 0.015% by weight*mm/µm3 and the ratio of average surface roughness of the polymethyl methacrylate layer Ra to the size of the spherical plastics particles Dp is in the range from 0.

Abstract: The present invention relates to a [lacuna] having at least one light-entry surface and at least one light-exit surface, the ratio of the light-exit surface area to the light-entry surface area being at least 4, comprising at least one light-guiding layer, characterized in that the light-guiding layer comprises at least 60% by weight, expressed in terms of the weight of the light-guiding layer, of polymethyl methacrylate and from 0.0001 to 0.2% by weight, expressed in terms of the weight of the light-guiding layer, of spherical particles with an average diameter in the range of from 0.3 to 40 ?m, and the light-exit surface of the light-guiding layer is provided with structurings.

Abstract: The present invention relates to rear-projection screens encompassing at least one light-scattering polymethyl methacrylate layer of thickness in the range from 0.05 to 4 mm comprising spherical particles whose size is in the range from 5 to 35 &mgr;m, at a concentration in the range from 2 to 60% by weight, based on the total weight of the light-scattering polymethyl methacrylate layer, the refractive index of the spherical plastics particles differing from that of the polymethyl methacrylate matrix by a value in the range from 0.02 to 0.2, wherein the concentration of the spherical plastics particles cp, the thickness of the light-scattering polymethyl methacrylate layer ds, and the size of the spherical plastics particles Dp is selected in such a way that the ratio cp*ds/Dp3 is in the range from 0.0015 to 0.015% by weight*mm/&mgr;m3 and the ratio of average surface roughness of the polymethyl methacrylate layer Ra to the size of the spherical plastics particles Dp is in the range from 0.05 to 0.4.

Abstract: The present invention provides a process for preparing bead polymers having an average particle size of 1 to 40 &mgr;m, which includes: contacting: at least one polymerizable mix which includes at least 50% by weight of at least one (meth)acrylate monomer, at least one aluminum compound, and an aqueous phase, to prepare a mixture; dispersing the mixture at a shear rate≧103 s−1 to form a dispersion, wherein the dispersion is stabilized by the aluminum compound; and polymerizing to produce bead polymers having an average particle size of 1 to 40 &mgr;m.