US 12,291,657 B2
Adhesive composition
Allan Walter McLennaghan, Horgen (CH); Yi Jin, Lake Jackson, TX (US); Jozef J. I. Van Dun, Horgen (CH); Ryan Schneider, Lake Jackson, TX (US); and Wanfu Ma, Shanghai (CN)
Assigned to Dow Global Technologies LLC, Midland, MI (US)
Appl. No. 17/603,790
Filed by Dow Global Technologies LLC, Midland, MI (US)
PCT Filed Apr. 15, 2019, PCT No. PCT/CN2019/082617
§ 371(c)(1), (2) Date Oct. 14, 2021,
PCT Pub. No. WO2020/210931, PCT Pub. Date Oct. 22, 2020.
Prior Publication US 2022/0213355 A1, Jul. 7, 2022
Int. Cl. C09J 123/08 (2006.01); C08L 91/06 (2006.01)
CPC C09J 123/0815 (2013.01) [C08L 91/06 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A composition comprising:
(A) from 35 wt % to 45 wt % of a random ethylene/α-olefin copolymer consisting of (i) ethylene and (ii) from 20 wt % to 35 wt % C6-C8 α-olefin comonomer, the ethylene/α-olefin copolymer having
a density from 0.880 g/cc to 0.895 g/cc;
a melt viscosity, at 177° C., from 12,000 mPa·s to 20,000 mPa·s;
a glass transition temperature from −55° C. to −20° C.;
(B) from 35 wt % to 45 wt % of a tackifier;
(C) from 15 wt % to 25 wt % of a wax selected from the group consisting of an ethylene-based wax having a melt viscosity at 135° C. less than or equal to 100 mPa·s, a propylene-based wax having a melt viscosity at 170° C. less than or equal to 100 mPa·s, and combinations thereof; and
wherein (A), (B), and (C) are the only polymeric components present in the composition; and
the composition has
(i) a set time of less than 3 seconds; and
(ii) a fiber tear greater than 90% at a temperature range from −20° C. to 60° C.