Abstract: Composition for the production of mouldings having a matt and structured surface character, comprising a polymer matrix and crosslinked polymer particles, the polymer matrix comprising at least one acrylic polymer and the composition containing (i) first crosslinked polymer particles having a volume average of the particle size in the range from 30 ?m to 1500 ?m and (ii) second crosslinked polymer particles having a volume average of the particle size of less than 30 ?m, the difference between the refractive index of the first polymer particles and the refractive index of the polymer matrix, measured in each case at 25° C., being less than 0.015 as an absolute value and the difference between the refractive index of the second polymer particles and the refractive index of the polymer matrix, measured at 25° C., being greater than or equal to 0.015 as an absolute value.

Abstract: Composition containing, based in each case on its total weight, A) 50.0% by weight to 99.5% by weight of at least one (meth)acrylate (co)polymer and B) 0.5% by weight to 50.0% by weight of at least one copolymer obtainable by polymerisation of a monomer mixture comprising i. 70% by weight to 92% by weight of a vinylaromatic monomer and ii. 8% by weight to 30% by weight of acrylonitrile or methacrylonitrile or mixtures thereof and iii. 0% by weight to 22% by weight of at least one further monomer, the composition having a haze according to ASTM D1003 of less than 2.0% at 23° C. and a haze according to ASTM D1003 of less than 4.0% at 40° C. and the composition containing at least one (meth)acrylate (co)polymer a) having a solution viscosity in chloroform at 25° C. (ISO 1628—part 6) of greater than 55 ml/g. The mouldings obtainable from the composition are distinguished in particular by improved stress cracking resistance and are suitable in particular for coverings, finishes or films.

Abstract: The present invention relates to a reactive mixture for coating mouldings by means of reaction injection moulding, comprising at least 40% by weight of (meth)acrylates having at least two double bonds, the reactive mixture comprising at least one photoinitiator and at least one thermal initiator.

Abstract: The invention relates to a composition containing, in relation to the total weight of said composition, A) between 50.0% by weight and 99.5% by weight of at least one (meth)acrylate (co)polymer and B) between 0.5% by weight and 50.0% by weight of at least one copolymer, obtained by the polymerisation of a monomer mixture consisting of i. between 70% by weight and 92% by weight of a vinyl aromatic monomer and ii. between 8% by weight and 30% by weight of acryl nitrile or methacryl nitrile or mixtures thereof iii. between 0% by weight and 22% by weight of at least one other monomer, the composition having at 50° C. a ?E of less than 0.15, ?E being defined according to the relationship (1): (1) in which ?L*: the modification of the colour co-ordinates L* compared with the colour co-ordinates L* at 23° C., ?a*: the modification of the colour co-ordinates a* compared with the colour co-ordinates a* at 23° C., ?b*: the modification of the colour co-ordinates b* compared to the colour co-ordinates b* at 23° C.

Abstract: Moulding composition, comprising, based in each case on the total weight of the moulding composition, A) from 49.5% by weight to 99.5% by weight of a polymer matrix which is composed of a (meth)acrylate (co)polymer or of a mixture composed of (meth)acrylate (co)polymer, B) from 0.5% by weight to 15.0% by weight of ceramic beads, where the melt volume index MVR, measured to ISO 1133 for 230° C. and 3.8 kg, of the moulding composition is from 0.1 cm3/10 min to 5.0 cm3/10 min. The moulding composition can be used for production of mouldings with a velvet-matt and preferably rough surface.

Abstract: Moulding composition, comprising, in each case based on the total weight of the moulding composition, A) from 83% by weight to 99.5% by weight of a polymer matrix which is composed of at least one (meth)acrylimide (co)polymer, B) from 0.5% by weight to 17.0% by weight of ceramic beads, where the melt volume index MVR of the moulding composition, measured to ISO 1133 at 260° C. using 10 kg, is from 1.0 cm3/10 min to 20.0 cm3/10 min. The moulding composition can be used for production of mouldings with a velvet-matt and preferably rough surface.

Abstract: The present invention relates to a core-shell particle which has a core, a first shell and, where appropriate, a second shell, where: i) the core encompasses, based on its total weight, at least 75.0% by weight of (meth)acrylate repeat units; ii) the first shell has a glass transition temperature below 30° C.; iii) the second shell present where appropriate encompassed, based on its total weight, at lest 75.0% by weight of (meth)acrylate repeat units; iv) the first shell encompasses, based on its total weight, the following constituents; E) from 92.0 to 98.0% by weight of (meth)acrylate repeat units and F) from 2.0 to 8.0% by weight of styrenic repeat units of the general formula (I) ?where the radicals R1 to R6 are defined according to the Description and the percentages by weight of E) and F) give a total of 100.0% by weight, v) the radius of the core-shell particle inclusive of any second shell present, measured by the Coulter method, is in the range from above 160.0 to 240.

Abstract: The invention relates to a multilayer film encompassing at least one upper layer a) and one middle layer b) composed of (meth)acrylate copolymers, and also a backing layer c) composed of polycarbonate, where the upper layer a) comprises a light stabilizer and is composed of a (meth)acrylate copolymer which can form semicompatible mixtures with the polycarbonate of the backing layer c), where a test specimen produced from a mixture composed of 20% by weight of (meth)acrylate copolymer and 80% by weight of polycarbonate has a tensile strain at break of at least 75% (ISO 527-2) at 23° C.

Abstract: The invention relates to a moulding composition, comprising a) 50 to 99.9% by weight of a matrix composed of a thermoplastic polymer and b) from 0.1 to 50% by weight of a matting agent in the form of a (meth)acrylate copolymer dispersed in the matrix, characterized in that the matting agent is a (meth)acrylate copolymer which has been prepared from the following monomers, b1) from 50 to 95% by weight of methyl methacrylate b2) from 5 to 50% by weight of C1-C6-alkyl acrylates b3) from 0.01 to less than 0.5% by weight of a crosslinking monomer and/or graft-linking agent having two or more ethylenically unsaturated radicals capable of free-radical polymerization, b4) from 0 to 20% by weight of one or more other, non-crosslinking ethylenically unsaturated monomers capable of free-radical polymerization, where the entirety of the constituents b1) and b2) and, where appropriate, b3) and/or b4) gives 100% by weight, and the glass transition temperature Tmg of the matting agent is at least 20° C.

Abstract: The invention describes a novel impact modifier, built up from core-shell1- and shell 2, the core being capable of plastic deformation. Good mechanical properties were achieved using a small amount of impact modifier.

Abstract: The invention describes a transparent plastics composite composed of PMMA and TPU with excellent mechanical properties.

Abstract: The invention relates to a multilayered film comprising at least one upper layer a), a middle layer b) made of (meth)acrylate copolymer, and a supporting layer c) made of polycarbonate. Upper layer a) contains a light-stability agent and is made of a (meth)acrylate copolymer that, together with the polycarbonate of supporting layer c), can form partially compatible mixtures. A test piece, which is made from a mixture consisting of 20% by weight of (meth)acrylate copolymer and 80% by weight of polycarbonate, has a breaking elongation (ISO 527-2) of at least 75% at 23° C. The middle layer b) contains a colorant and, optionally, a light-stability agent and is made from an identical or different (meth)acrylate copolymer that, together with the polycarbonate of supporting layer c), can form partially compatible mixtures.

Abstract: The invention relates to a multilayer film encompassing at least one upper layer a) and one middle layer b) composed of (meth)acrylate copolymers, and also a backing layer c) composed of polycarbonate, where the upper layer a) comprises a light stabilizer and is composed of a (meth)acrylate copolymer which can form semicompatible mixtures with the polycarbonate of the backing layer c), where a test specimen produced from a mixture composed of 20% by weight of (meth)acrylate copolymer and 80% by weight of polycarbonate has a tensile strain at break of at least 75% (ISO 527-2) at 23° C.

Abstract: The invention relates to subduedly colored (brown, gray, black, green), infrared reflecting PMMA compounds which can be applied to other plastic compounds as an IR barrier layer

Abstract: The invention relates to a pH-sensitive polymer which is a (meth)acrylate copolymer composed of 20 to 65% by weight acrylic and/or methacrylic acid units and 80 to 35% by weight units of C1- to C18-alkyl esters of (meth)acrylic acid, characterized in that it has a molecular weight in the range from 1 000 to 50 000 g/mol, and brings about at least 60% haemolysis at pH 5.5, and less than 5% haemolysis at pH 7.4, in a concentration of 150 ?g/ml in a cytotoxicity test with human red blood cells. The invention further relates to the use of the pH-sensitive polymer as carrier for pharmaceutically effective biomolecules or active pharmaceutical ingredients and as ingredient of corresponding dosage forms.

Abstract: The invention describes transparent plastics mixtures having low-temperature impact resistance composed of a thermoplastic polyurethane (TPU) and of an impact-modified poly(meth)acrylate (PMMA).

Abstract: The invention relates to a process for producing a coated drug form or a drug form in the form of an active ingredient matrix, by processing a copolymer, an active pharmaceutical ingredient, a core if present and/or pharmaceutically customary excipients in a conventional manner by melting, injection molding, extrusion, wet granulation, casting, dipping, spreading, spraying or compression to form a coated drug form and/or to form an active ingredient matrix, characterized in that a copolymer is used which is composed of 20 to 33% by weight methacrylic acid, 5 to 30% by weight methyl acrylate, 20 to 40% by weight ethyl acrylate and more than 10 to 30% by weight butyl methacrylate and, if desired, 0 to 10% by weight further vinylically copolymerizable monomers, with the proviso that the glass transition temperature of the copolymer in accordance with ISO 11357-2, section 3.3.3, is 55 to 70° C.

Abstract: The invention relates to a hot sealing system comprised of an olefin polymer or of an olefin polymer A, of a methacrylate polymer B, of a graft polymer A-X consisting of the above-mentioned constituents and of a solvent or solvent mixture. The hot sealing system is characterized by having a high thermal stability and short sealing times.

Abstract: Process for preparation of bead polymers whose average particle size is in the range from 1 ?m to 40 ?m, by dispersing and polymerizing a polymerizable composition in an aqueous phase, where the dispersion stabilized by an aluminium compound is prepared at a shear rate ?103 s?1. A polymerizable composition is used here which, in each case based on its total weight, comprises a) more than 50.0% by weight of at least one compound of the formula (I), ?where the radicals 1R to 6R have definitions according to the Description, b) from 0.1% by weight to 10.0% by weight of at least one crosslinking agent and c) less than 49.9% by weight of at least one compound of the formula (II) ?where the radicals R and 7R to 9R have definitions according to the Description The bead polymers prepared according to the inventive process are particularly suitable for production of mouldings with light-scattering properties.

Abstract: The invention relates to core-shell structured silicone rubber graft polymers that comprise a core a) from a silicium-organic polymer that corresponds to the general formula (R2SiO2/2)x.(RSiO3/2)y.(SiO4/2)z, wherein x=0 to 99.5 mole %, y=0.5 to 100 mole %, z=0 to 50 mole %, wherein R is the same or different and represents alkyl or alkenyl groups having 1 to 6 C atoms, aryl groups or substituted hydrocarbon groups and at last one shell c) from an organic polymer. The silicone rubber graft copolymers are obtained by producing the organic shell c) by radical polymerization at a temperature of not more than 65° C. and adding the initiator in at least two portions to the reaction vessel, with a further addition at least 2 minutes after start of the polymerization.