摘要:
Pressure-sensitive adhesive based on a mixture of chemically crosslinked polyurethane and at least one hydrocarbon resin, the chemically crosslinked polyurethane being a reaction product of at least one aliphatic or alicyclic polyisocyanate and a combination of at least one polypropylene glycol diol and one polypropylene glycol triol, reacted with one another catalytically in the presence of the at least one hydrocarbon resin, the at least one hydrocarbon resin being a monomer resin of the styrene/α-methylstyrene type.
摘要:
Pressure-sensitive adhesive based on a mixture of chemically crosslinked polyurethane and at least one hydrocarbon resin, the chemically crosslinked polyurethane being a reaction product of at least one aliphatic or alicyclic polyisocyanate and a combination of at least one polypropylene glycol diol and one polypropylene glycol triol, reacted with one another catalytically in the presence of the at least one hydrocarbon resin, the at least one hydrocarbon resin being a monomer resin of the styrene/α-methylstyrene type.
摘要:
Adhesive tape having at least two layers A and B laminated directly on one another, with at least one or both layers A or B being an adhesive, and the interfaces of the layers A and B laminated on one another being subjected to a physical method, the physical method being selected from the group consisting of corona discharge, dielectric barrier discharge, flame pretreatment and plasma treatment, before the layers are laminated to one another, with the two methods differing from one another.
摘要:
A double-sided adhesive tape useful for adhesively bonding articles composed of thermoplastic polymer, of EPDM, or of another rubberlike material is provided, having a first outer, pressure-sensitive adhesive side and a second outer, thermally-activatable side, and that comprises an at least dual-layered product construction consisting of layers A and B, layer A being a pressure-sensitive adhesive layer that is chemically cross-linked by thermal initiation, or being a pressure-sensitively adhesive carrier layer chemically cross-linked by thermal initiation, layer B being a thermoplastic synthetic material-based layer, layers A and B being in direct contact with one another, and the surface of layer A, which is in direct contact with layer B, having been corona or plasma pre-treated. The corona or plasma pre-treatment takes place in an atmosphere of nitrogen, carbon dioxide or a noble gas, or a mixture of at least two of these gases.
摘要:
A preferably unbacked adhesive tape with permanent full-area pressure sensitive adhesion, composed of a film of a pressure sensitive adhesive which is preferably coated onto an antiadhesive medium and comprises an alkaline, solid, pulverized, mineral filler with a weight fraction of between more than 5% by weight and 60% by weight, based on the total weight of the adhesive, so that the permanently pressure sensitively adhesive surface of the adhesive tape has a pH of more than 8, and a conductive additive, especially a metal powder, a powder coated with a metal, and/or metallized beads, with a weight fraction of between more than 5% by weight and 60% by weight, so that the adhesive tape is electrically conductive in the z direction, i.e., in the direction of the thickness of the tape.
摘要:
The invention relates to hydroxyl-functionalised polyurethane hot melt prepolymers comprising the chemical reaction product of isocyanate-reactive starting materials with at least one isocyanate-containing starting material. Said prepolymers are characterized in that the isocyanate-reactive starting materials of the hydroxyl-functionalised polyurethane hot melt prepolymers have a polypropylene glycol with a functionality higher than two and a number-average molar mass higher than or equal to 3,000 g/mol, a polypropylene glycol with a functionality less than or equal to two and a number-average molar mass less than or equal to 1,000 g/mol, and a chain lengthener with a functionality less than or equal to 500 g/mol, and the isocyanate-containing starting material of the hydroxyl-functionalised polyurethane hot melt prepolymer has an aliphatic or alicyclic diisocyanate.
摘要:
Polyurethane-based pressure-sensitive adhesive, characterized in that the polyurethane is composed of the following starting materials which are reacted catalytically with one another in the stated proportions: a) at least one aliphatic or alicyclic polyisocyanate having a functionality of in each case less than or equal to three, b) a combination of at least one triol A based on polypropylene glycol and having an average number-averaged molecular weight Mn of less than or equal to 1000 and a triol B based on polypropylene glycol and having an average number-averaged molecular weight Mn of greater than or equal to 1000, preferably greater than or equal to 3000, the ratio of the number of hydroxyl groups of the triol component A to the number of hydroxyl groups of the triol component B being between greater than 0 and 12, the ratio of the number of isocyanate groups to the total number of hydroxyl groups being between 0.8 and 1.15, preferably between 0.95 and 1.05, the catalyst for the reaction to the polyurethane consisting of or comprising a compound comprising bismuth and carbon, preferably a bismuth carboxylate or a bismuth carboxylate derivative.
摘要:
The invention relates to a double-sided adhesive tape having a first outer, pressure-sensitive adhesive side and a second outer, thermally-activatable side, and that comprises an at least dual-layered product construction consisting of layers A and B, layer A being a pressure-sensitive adhesive layer that is chemically cross-linked by thermal initiation, or being a pressure-sensitively adhesive carrier layer chemically cross-linked by thermal initiation, layer B being a thermoplastic synthetic material-based layer, layers A and B being in direct contact with one another, and the surface of layer A, which is in direct contact with layer B, having been corona or plasma pre-treated. The corona or plasma pre-treatment takes place in an atmosphere of nitrogen, carbon dioxide or a noble gas, or a mixture of at least two of these gases. The inventive adhesive tape is useful for adhesively bonding articles composed of thermoplastic polymer, of EPDM, or of another rubberlike material.
摘要:
Pressure-sensitive adhesive based on polyurethane, characterized in that the polyurethane is composed of the following starting materials which are reacted with one another in the stated proportions: a) at least one aliphatic or alicyclic diisocyanate having in each case an asymmetrical molecular structure, b) a combination of at least one polypropylene glycol diol and at least one polypropylene glycol triol, the ratio of the number of hydroxyl groups in the diol component to the number of hydroxyl groups in the triol component being between 0.7 and 9.0, preferably between 1.5 and 2.5, additionally the ratio of the number of isocyanate groups to the total number of hydroxyl groups being between 0.9 and 1.1, preferably between 0.95 and 1.05, and the diols and triols alternatively being selected and combined in each case as follows: diols having a molecular weight of less than or equal to 1000 are combined with triols whose molecular weight is greater than 1000, preferably greater than or equal to 3000, diols having a molecular weight of greater than 1000 are combined with triols whose molecular weight is less than 1000.
摘要:
Method for increasing the adhesive power of a pressure-sensitive adhesive layer having an upper and a lower surface, wherein at least one surface of the pressure-sensitive adhesive layer is subjected to a physical process, said physical process being selected from among the group comprising corona discharge, dielectric barrier discharge, preliminary flame treatment, or plasma treatment.