摘要:
Radical copolymerization method comprising the steps of (a) providing a monomer or monomer mixtures having unsaturated C═C double bonds; (b) starting the radical (co)polymerization by means of a first addition of an initiator, and then (c) adding at least one amino acid as a regulating substance, wherein the addition of the regulating substance takes place after reaching a conversion of 50% relative to the unsaturated C═C double bonds of the monomer or monomer mixture provided in step (a)
摘要:
The invention relates to a process for preparing a pressure-sensitive adhesive based on at least one polymer, in the course of which said at least one polymer is crosslinked, the polymer having functional groups Y and having been admixed, further, with at least one kind of functionalized particles which have at least one nonpolymeric base unit, wherein the particles having a surface modification of the base unit, the surface modification of the particles having at least one kind of functional groups Z, which can not undergo any reaction with the functional group Y and is converted into group X by thermal energy, electromagnetic radiation, particulate radiation and/or sound energy and the crosslinking of the polymer being brought about at least in part by a reaction of the functional groups X of the particles and the functional groups Y of the polymer, and further to pressure-sensitive adhesives based on at least one crosslinked polymer component, the crosslinking of the polymer component being brought about at least in part by incorporation of the functionalized particles, the particles having at least one nonpolymeric base unit and also a surface modification of this base unit, and the surface modification of the particles having at least one kind of functional groups Z which, after conversion to group X by way of thermal energy, electromagnetic radiation, particulate radiation and/or sound energy, are capable of reacting with functional groups Y present in the polymer component, and also to the use of surface-modified functionalized particles having a nonpolymeric base unit as crosslinking reagents for crosslinking polymers for preparing pressure-sensitive adhesives.
摘要:
The invention relates to a process for preparing a pressure-sensitive adhesive based on at least one polymer, in the course of which said at least one polymer is crosslinked, the polymer having functional groups Y and having been admixed, further, with at least one kind of functionalized particles which have at least one nonpolymeric base unit, wherein the particles having a surface modification of the base unit, the surface modification of the particles having at least one kind of functional groups Z, which can not undergo any reaction with the functional group Y and is converted into group X by thermal energy, electromagnetic radiation, particulate radiation and/or sound energy and the crosslinking of the polymer being brought about at least in part by a reaction of the functional groups X of the particles and the functional groups Y of the polymer, and further to pressure-sensitive adhesives based on at least one crosslinked polymer component, the crosslinking of the polymer component being brought about at least in part by incorporation of the functionalized particles, the particles having at least one nonpolymeric base unit and also a surface modification of this base unit, and the surface modification of the particles having at least one kind of functional groups Z which, after conversion to group X by way of thermal energy, electromagnetic radiation, particulate radiation and/or sound energy, are capable of reacting with functional groups Y present in the polymer component, and also to the use of surface-modified functionalized particles having a nonpolymeric base unit as crosslinking reagents for crosslinking polymers for preparing pressure-sensitive adhesives.
摘要:
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.
摘要:
The invention relates to double-sided adhesive tape comprising a viscoelastic, first polymer layer, a second polymer layer on the top face and a third polymer layer on the bottom face of the viscoelastic, first polymer layer, where the viscoelastic, first polymer layer is based on a polymer which is obtainable by polymerization of a monomer composition of 65% to 97% by weight of ethylhexyl acrylate and/or butyl acrylate, 0% to 30% by weight of methyl acrylate, 3% to 15% by weight of acrylic acid, the viscoelastic interlayer being crosslinked, the second polymer layer is based on a polymer which is obtainable by polymerization of a monomer composition of 85% to 95% by weight of ethylhexyl acrylate and/or butyl acrylate, 5% to 15% by weight of acrylic acid, this second polymer layer being thermally crosslinked using at least one epoxycyclohexyl derivative in the absence of accelerators.
摘要:
The present invention relates to a method for thermal crosslinking of adhesives and also to products produced with these adhesives. An object of the invention is to provide a method for thermal crosslinking of adhesives where the crosslinking is covalent and (initiated by a chemical or physical stimulus) reversible. As and when required, the crosslinking method can also be configured to result in a covalent, irreversible network.
摘要:
A process produces a separative layer of a release liner, based on a formulation comprising at least one alkenyl-substituted organopolysiloxane, wherein the formulation is present in solution. During the process a metathesis catalyst is added to the solution and the solution with the metathesis catalyst is applied onto a carrier material, wherein, on the carrier material, a metathesis reaction of the alkenyl-substituted organopolysiloxane takes place for crosslinking of the formulation.
摘要:
A method for anticorrosive treatment of metal surfaces, especially at edges and transitions of the metal components, characterized in that a self-adhesive tape is applied to the metal surface and the self-adhesive tape contains at least one layer with a material which is heated such that the material melts onto the metal surface and thus forms an anticorrosive layer.
摘要:
Use of amino acids as regulator substances in the free-radical polymerization of monomer mixtures comprising at least 70% by weight of at least one acrylic and/or methacrylic ester and reaction solution comprising one or more solvents and one or more monomers, at least 50% by weight of the solvents being organic solvents, and at least 70% by weight of the monomers being acrylic and/or methacrylic esters, with at least one amino acid is being present.
摘要:
A heating element including a current conductor through which electric power is conducted and electricity converted into heat by a voltage drop across an ohmic resistor. The heating element is a planar or a strip-shaped structure and is provided with at least one support layer and an adhesive layer, while the current conductor is designed as an additional, current-conducting layer which is arranged between the support layer and the adhesive layer. The support layer, the current-conducting layer, and the adhesive layer are transparent.