	US 12,480,023 B2
	Hot-melt adhesive
Ai Takamori, Osaka (JP)
Assigned to HENKEL AG & CO. KGaA, Duesseldorf (DE)
Filed by HENKEL AG & CO.KGAA, Duesseldorf (DE)
Filed on Jun. 7, 2021, as Appl. No. 17/340,336.
Application 17/340,336 is a continuation of application No. PCT/JP2019/048070, filed on Dec. 9, 2019.
Claims priority of application No. 2018-233576 (JP), filed on Dec. 13, 2018.
Prior Publication US 2021/0292605 A1, Sep. 23, 2021
Int. Cl. C09J 7/35 (2018.01); C08K 5/01 (2006.01); C08L 23/0807 (2025.01); C08L 23/0853 (2025.01); C08L 23/16 (2006.01); C08L 91/06 (2006.01)

CPC C09J 7/35 (2018.01) [C08K 5/01 (2013.01); C08L 23/0815 (2013.01); C08L 23/0853 (2013.01); C08L 23/16 (2013.01); C08L 91/06 (2013.01); C08L 2201/08 (2013.01); C08L 2205/025 (2013.01); C08L 2205/035 (2013.01); C08L 2314/06 (2013.01); C09J 2301/304 (2020.08); C09J 2301/414 (2020.08); C09J 2423/04 (2013.01); C09J 2423/10 (2013.01); C09J 2423/16 (2013.01); C09J 2491/00 (2013.01)]

14 Claims

1. A hot-melt adhesive comprising:

a copolymer (A) comprising a mixture of a propylene/ethylene copolymer that is prepared with a metallocene catalyst (A1), an ethylene/octene copolymer that is prepared with a metallocene catalyst (A2), and a metallocene-type ethylene/hexene copolymer (A3);

a copolymer of ethylene and carboxylate esters having ethylenically unsaturated double bonds (B) comprising an ethylene/vinyl acetate copolymer (B1);

a tackifying resin (C); and

a wax (D), wherein:

the propylene/ethylene copolymer (A1) is present in an amount of from 5 to 40 parts by weight, based on 100 parts by total weight of the hot-melt adhesive,

the ethylene/octene copolymer (A2) is present in an amount of from 10 to 40 parts by weight, based on 100 parts by total weight of the hot-melt adhesive, and

the hot-melt adhesive has a viscosity of from 500-3000 mPas at 150° C., measured with Brookfield Viscometer, spindle 27.