Pressure sensitive adhesive
The intention is to provide powerful pressure sensitive adhesives with high adhesion and adjustable cohesive failure characteristics. This is accomplished with pressure sensitive adhesives which comprise 30-90 wt % of at least one poly(meth)acrylate; 10-60 wt % of three-dimensional bodies K made from an inorganic material with a maximum extent of 40 to 300 μm; and 0.1-10 wt % of at least partly expanded microballoons M, based in each case on the total weight of the pressure sensitive adhesive. Another subject of the invention is an adhesive tape which comprises a pressure sensitive adhesive of this kind.
1. A pressure sensitive adhesive comprising
30-90 wt % of at least one poly(meth)acrylate;
10-60 wt % of three-dimensional bodies K made from an inorganic material with a maximum extent of 40 to 300 μm; and
0.1-10 wt % of at least partly expanded microballoons M,
based in each case on the total weight of the pressure sensitive adhesive.
2. The pressure sensitive adhesive according to claim 1 , wherein the inorganic material of the three-dimensional bodies K is glass, ceramic and/or flyash.
3. The pressure sensitive adhesive according to claim 1 , wherein the three-dimensional bodies K are solid glass beads, hollow ceramic beads and/or hollow flyash beads.
4. The pressure sensitive adhesive according to claim 1 , wherein the maximum extent of the three-dimensional bodies K is 45 pm to 150 μm.
5. The pressure sensitive adhesive according to claim 1 , wherein the pressure sensitive adhesive contains 30-50 wt % of three-dimensional bodies K.
6. The pressure sensitive adhesive according to claim 1 , wherein the pressure sensitive adhesive contains 30-50 wt % of three-dimensional bodies K having a maximum extent of 45 to 150 μm.
7. The pressure sensitive adhesive according to claim 1 , wherein the weight ratio of three-dimensional bodies K to at least partly expanded microballoons M is from 6:1 to 30:1.
8. An adhesive tape comprising a pressure sensitive adhesive A which pressure sensitive adhesive A is a pressure sensitive adhesive according to claim 1 .
9. The adhesive tape according to claim 8 , wherein the adhesive tape comprises on at least one side of the pressure sensitive adhesive A a further pressure sensitive adhesive.
10. The pressure sensitive adhesive according to claim 2 , wherein the maximum extent of the three-dimensional bodies K is 45 μm to 150 μm.
11. The pressure sensitive adhesive according to claim 3 , wherein the maximum extent of the three-dimensional bodies K is 45 μm to 150 μm.
12. The pressure sensitive adhesive according to claim 2 , wherein the pressure sensitive adhesive contains 30-50 wt % of three-dimensional bodies K.
13. The pressure sensitive adhesive according to claim 3 , wherein the pressure sensitive adhesive contains 30-50 wt % of three-dimensional bodies K.
14. The pressure sensitive adhesive according to claim 2 , wherein the pressure sensitive adhesive contains 30-50 wt % of three-dimensional bodies K having a maximum extent of 45 to 150 μm.
15. The pressure sensitive adhesive according to claim 3 , wherein the pressure sensitive adhesive contains 30-50 wt % of three-dimensional bodies K having a maximum extent of 45 to 150 μm.
16. The pressure sensitive adhesive according to claim 2 , wherein the weight ratio of three-dimensional bodies K to at least partly expanded microballoons M is from 6:1 to 30:1.
17. The pressure sensitive adhesive according to claim 3 , wherein the weight ratio of three-dimensional bodies K to at least partly expanded microballoons M is from 6:1 to 30:1.
18. An adhesive tape comprising a pressure sensitive adhesive A, which pressure sensitive adhesive A is a pressure sensitive adhesive according to claim 2 .
19. An adhesive tape comprising a pressure sensitive adhesive A, which pressure sensitive adhesive A is a pressure sensitive adhesive according to claim 3 .