Abstract: Transparent acrylate pressure-sensitive adhesive comprising a filler, the acrylate-pressure sensitive adhesive comprising a polyacrylate and particles of silicate and/or of silica gel. The particles of silicate and/or of silica gel have a size of not more than 50 nm. The acrylate pressure-sensitive adhesive is prepared by a process in which acrylates and comonomers are polymerized in the presence of at least one organic solvent or in bulk, the particles of silicate and/or of silica gel being mixed in before or after the polymerization.

Abstract: The invention relates to pressure-sensitive adhesive tapes for flying splice of flat web materials, having at least one splittable carrier and two layers of adhesive, at least one of the adhesives being a silicone PSA, more particularly an electron-beam-crosslinked silicone PSA, and also to a method of producing them. The silicone PSA advantageously has at least one polydiorganosiloxane having the structure —Si(R2)—O—[Si(R2)—O]n—Si(R2)—, where the 2n+4 substituents R independently of one another are monovalent hydrocarbon radicals and n is an integer, and also at least one resin (“MQ resin”) constructed from (R2)3SiO1/2— units (“M units”) and SiO4/2 units (“Q units”), the substituents R2 of the M units being independently of one another alkyl groups, alkenyl groups, alkylsilyl groups, hydroxyl groups or hydrogen.

Abstract: Crosslinker-accelerator system for the thermal crosslinking of polyacrylates with functional groups suitable for entering into linking reactions with cyclic ethers, more particularly epoxide groups or oxetane groups, comprising at least one substance containing epoxide or oxetane grouops (crosslinker) and at least one substance with an accelerating action for the linking reaction at a temperature below the melting temperature of the polyacrylate (accelerator).

Abstract: Method for producing a polyacrylate adhesive compound by a hot-melt method in which a polyfunctional ?-cleaving initiator, which is present as an oligomer, is added to the polymer to be crosslinked prior to the hot-melt method and ultraviolet crosslinking is carried out after treatment in the hot-melt method.

Abstract: A Polyacrylate having an at least bimodal molecular weight distribution is disclosed.

Abstract: The invention relates to a pressure-sensitive supporting material, which can be (intrinsically) heated by an inner heat source, and to the use thereof. The heatable supporting material is characterized in that the supporting material comprises a pressure-sensitive adhesive layer inside of which heat is generated. The pressure-sensitive adhesive layer is a pressure-sensitive adhesive compound, which can be heated by electric current, induction, a chemical reaction or by a physical phase transition. The heatable supporting material has a high heating capacity and is suited for producing pressure-sensitive tapes for adhering heatable mirrors.

Abstract: The invention relates to a process for preparing homogeneously crosslinked polymers, in which at least one crosslinker is added to a polymer in the melt, in which the polymer is further processed from the melt, and in which a thermal crosslinking reaction is brought about by means of the crosslinker, with at least part of the crosslinking reaction taking place after the further processing at a temperature below the melting temperature of the polymer, characterized in that the crosslinker comprises an at least difunctional compound, at least one of the functional groups being an oxazoline group, and the polymer contains functional groups which, at a temperature below the melting temperature of the polymer, are able to react with the oxazolines in a linking reaction in the sense of the thermal crosslinking reaction.

Abstract: Crosslinker/accelerator system for thermally crosslinking polyacrylates with functional groups that are adapted to react with epoxy groups in a crosslinking reaction, comprising at least one epoxy group-containing substance and at least one substance that accelerates the crosslinking reaction at a temperature below the melting temperature of the polyacrylate.

Abstract: A pressure-sensitive adhesive composition comprising polymers and/or copolymers based at least predominantly on (meth)acrylic acid and/or derivatives thereof, wherein said composition possesses an outgassing level of not more than 50 ?g/g in total, preferably less than 10 ?g/g, when said composition is measured by the tesa method.

Abstract: Method for increasing the molecular weight of polyacrylates, in which polyacrylates, functionalized at least in part of their chain ends by functional groups X, are reacted with a compound having at least functional groups Y capable of linking reactions with functional groups X.

Abstract: The invention relates to a ceramic green body consisting of at least two ceramic bodies that are bonded together. The invention is characterized in that the green body is produced using an adhesive tape that consists of an adhesive film located on a release liner.

Abstract: A pressure sensitive adhesive comprised of P(A)-P(B)-P(A) block copolymers, wherein P(A) has a glass transition temperature of 0° C. or below, P(B) has a glass transition temperature of 20° C. or above, and P(A) and P(B) are immiscible.

Abstract: A process for increasing the molecular weight of polyacrylates, characterized in that polyacrylates which are functionalized at least on one part of their chain ends by photoinitiator groups X are exposed to actinic radiation, so that a direct linking reaction of the polyacrylates takes place.

Abstract: A UV-transparent pressure sensitive adhesive comprising (a) a copolymer of (a1) from 75 to 99.8% by weight of acrylic esters and/or methacrylic esters of the formula CH2?CH(R1)(COOR2), where R1 is H or CH3 and R2 is an alkyl chain having 1 to 20 carbon atoms; (a2) from 0 to 10% by weight of acrylic acid and/or methacrylic acid of the formula CH2?CH(R1)(COOH), where R1 is H or CH3; (a3) from 0.2 to 5% by weight of olefinically unsaturated monomers which contain at least one UV-crosslinking functional group per monomer; and (a4) from 0 to 20% by weight of olefinically unsaturated monomers which contain at least one functional group per monomer; the copolymer having a weight average molecular weight of less than 300,000 g/mol and (b) from 2 to 20% by weight, based on the weight of copolymer, of a silicate filler, the silicate filler having a maximum particle diameter of 50 nm; and having a residual solvent fraction of less than 1%, based on the pressure sensitive adhesive.

Abstract: Method for producing a polyacrylate adhesive compound by a hot-melt method in which a polyfunctional ?-cleaving initiator, which is present as an oligomer, is added to the polymer to be crosslinked prior to the hot-melt method and ultraviolet crosslinking is carried out after treatment in the hot-melt method.

Abstract: A process for preparing pressure sensitive adhesives based on acrylate hotmelt, in which a monomer mixture including at least the following monomers (a) 70 to 100% by weight of compounds from the group of (meth)acrylic acid and the derivatives thereof corresponding to the following general formula is free-radically polymerized in solution wherein I. the polymerization is initiated using at least one dissociating photoinitiator and by irradiation with ultraviolet light, the photoinitiator being added to the monomer mixture before the beginning of the polymerization and/or to the reaction mixture in the course of the polymerization, II. the polyacrylate is freed from the solvent, III. the polyacrylate is processed further in the melt.

Abstract: Process for preparing crosslinked pressure ensitive adhesives, in which a plyacrylate is prepared by the free radical copolymericzation of a monomer mixture , the polyacrylate is then concentrated and the concentrated polyacrylate is reacted with further monomers having functional groups and subsequently crosslinking.

Abstract: A process for preparing acrylic pressure sensitive adhesives by means of radical polymerization of a monomer mixture to give a polyacrylate, wherein said polymerization is carried out with an initiator system comprising at least one triazolinyl compound of the general formula

Abstract: The invention relates to a repulpable pressure-sensitive adhesive. Provision is made for the repulpable pressure-sensitive adhesive to comprise at least one polyacrylate-based block copolymer.

Abstract: A pressure sensitive adhesive obtainable by free-radical polymerization, characterized in that at least 65% by weight of the adhesive is based on at least one acrylic monomer from the group of the compounds of the following general formula: where R1=H or CH3 and the radical R2=H or CH3 or is selected from the group consisting of branched or unbranched saturated alkyl groups having 2–20 carbon atoms, the average molecular weight of the adhesive is at least 65,000, applied to a carrier, the adhesive possesses a preferential direction, where the refractive index measured in the preferential direction nMD is greater than the refractive index measured in a direction perpendicular to the preferential direction nCD, the difference ?n=nMD?nCD being at least 1·10?5.