	US 12,404,433 B2
	Non-swelling hot melt adhesive
Anna Cherian, Wassenaar (NL); and Jarkko T. Pitko, Wassenaar (NL)
Assigned to Avery Dennison Corporation, Mentor, OH (US)
Appl. No. 17/049,325
Filed by Avery Dennison Corporation, Glendale, CA (US)
PCT Filed Apr. 26, 2019, PCT No. PCT/US2019/029273 § 371(c)(1), (2) Date Oct. 20, 2020, PCT Pub. No. WO2019/210120, PCT Pub. Date Oct. 31, 2019.
Claims priority of provisional application 62/663,288, filed on Apr. 27, 2018.
Prior Publication US 2021/0238457 A1, Aug. 5, 2021
Int. Cl. C09J 153/02 (2006.01); C09J 7/24 (2018.01); C09J 7/38 (2018.01); C09J 123/22 (2006.01); C09J 147/00 (2006.01); G09F 3/02 (2006.01)

CPC C09J 153/02 (2013.01) [C09J 7/243 (2018.01); C09J 7/387 (2018.01); C09J 123/22 (2013.01); C09J 147/00 (2013.01); G09F 3/02 (2013.01); C09J 2423/046 (2013.01); C09J 2453/00 (2013.01); G09F 2003/023 (2013.01); Y10T 428/1476 (2015.01); Y10T 428/2883 (2015.01)]

28 Claims

1. A hot melt adhesive comprising:

one or more styrene block copolymers;

a tackifier;

a polyisobutylene; and

a plasticizer oil,

wherein the number average molecular weight of the polyisobutylene ranges from 700 g/mol to 2500 g/mol, and

wherein the adhesive is a pressure sensitive adhesive;

wherein the one or more styrene block copolymers is selected from the group consisting of a styrene isoprene block copolymer, styrene butadiene block copolymer, or combinations thereof; and

the melt index of each of the styrene block copolymers ranges from about 10 g/(10 minute) to about 35 g/(10 minute) measured at 200° C. under pressure of 5 kg weight; and

wherein at least one of the one or more styrene block copolymers is a styrene butadiene block copolymer.