	US 11,920,066 B2
	Adhesive tape particularly for oily surfaces
Christian Schuh, Hamburg (DE); Yvonne Querdel, Ahrensburg (DE); Alexander Kutter, Hamburg (DE); and Lars Guldbrandsen, Barsbüttel (DE)
Assigned to tesa SE, Norderstedt (DE)
Appl. No. 17/272,522
Filed by tesa SE, Norderstedt (DE)
PCT Filed Aug. 20, 2019, PCT No. PCT/EP2019/072284 § 371(c)(1), (2) Date Mar. 1, 2021, PCT Pub. No. WO2020/043556, PCT Pub. Date Mar. 5, 2020.
Claims priority of application No. 10 2018 214 534.2 (DE), filed on Aug. 28, 2018.
Prior Publication US 2021/0324242 A1, Oct. 21, 2021
Int. Cl. C09J 7/35 (2018.01); C09J 7/38 (2018.01); C09J 123/16 (2006.01); C09J 163/00 (2006.01)

CPC C09J 7/383 (2018.01) [C09J 7/35 (2018.01); C09J 123/16 (2013.01); C09J 163/00 (2013.01); C09J 2301/204 (2020.08); C09J 2301/208 (2020.08); C09J 2301/302 (2020.08); C09J 2301/304 (2020.08); C09J 2400/166 (2013.01); Y10T 428/2804 (2015.01); Y10T 428/2813 (2015.01); Y10T 428/2826 (2015.01); Y10T 428/2848 (2015.01); Y10T 428/287 (2015.01); Y10T 428/2883 (2015.01)]

21 Claims

1. An adhesive tape for oily surfaces, comprising:

a first layer of a heat-curable adhesive; and

a second layer of a pressure-sensitive adhesive on one surface of the first layer of the heat-curable adhesive,

wherein the pressure-sensitive adhesive of the second layer is based on one or more rubbers having a saturated carbon chain of polymethylene,

wherein the second layer of the pressure-sensitive adhesive comprises a thickness in the range from 10 μm to 45 μm and at least 50% (by weight) of the one or more rubbers having a saturated carbon chain of polymethylene and 50 to 300 parts of solid tackifying resins relative to 100 parts of the one or more rubbers in solid form, the solid tackifying resins having a softening temperature of greater than 60° C., and

further wherein a surface coverage of the second layer of the pressure-sensitive adhesive on the one surface of the first layer of the heat-curable adhesive is between 5% and 50% and a coat weight of the second layer is from 0.6 g/m²to 6.6 g/m².