UV-CROSSLINKABLE, RESIN-MODIFIED ADHESIVE
The aim is to reduce the flagging tendency of an adhesive bond using a UV-crosslinkable adhesive. This aim is accomplished by provision of a composition which comprises at least one UV-crosslinkable polyacrylate and at least one terpene-phenolic resin, the total concentration of the terpene-phenolic resins being 1 to 5 wt %, based on the total weight of the composition. The invention additionally relates to a pressure-sensitive adhesive produced on the basis of this composition, an adhesive tape based on said adhesive and the use of said tape for wrapping elongate material such as cable harnesses, for example.
1 . Composition comprising at least one UV-crosslinkable polyacrylate and at least one terpene-phenolic resin, the total concentration of the terpene-phenolic resins being 1 to 5 wt % based on the total weight of the composition.
2 . Composition according to claim 1 , wherein the total concentration of the terpene-phenolic resins is 2 to 4 wt %, based on the total weight of the composition.
3 . Composition according to claim 1 , wherein the total concentration of the terpene-phenolic resins is 2.5 to 3.5 wt %, based on the total weight of the composition.
4 . Composition according to claim 1 , wherein the terpene-phenolic resin has a softening temperature (Ring & Ball softening point, measured in accordance with ASTM E28-99) of at least 90° C.
5 . Pressure-sensitive adhesive obtainable by UV-crosslinking a composition according to claim 1 .
6 . Pressure-sensitive adhesive according to claim 5 , wherein the UV crosslinking takes place at a UV dose of <100 mJ/cm 2 .
7 . Adhesive tape obtained by applying a composition according to claim 1 from the melt to a carrier and UV-crosslinking the composition.
8 . Adhesive tape according to claim 7 , wherein the composition is applied with a weight per unit area of 20 to 120 g/m 2 .
9 . Adhesive tape according to claim 7 , wherein the UV crosslinking takes place at a UV dose of <100 mJ/cm 2 .
10 . Adhesive tape according to claim 7 , wherein the carrier is a woven fabric, nonwoven or film carrier.
11 . Method of using a composition according to claim 1 for producing a pressure-sensitive adhesive.
12 . Method of using a composition according to claim 1 for producing adhesive tapes for cable wrapping.
13 . Method of using a pressure-sensitive adhesive according to claim 5 for producing adhesive tapes for cable wrapping.
14 . A method for wrapping elongate material, said method comprising guiding an adhesive tape according to claim 7 in a helical line around the elongate material.
15 . A method for wrapping elongate material, said method comprising enveloping elongate material in an axial direction by an adhesive tape according to claim 7 .
16 . Elongate material wrapped with an adhesive tape according to claim 7 .