	US 12,331,226 B2
	Polyurethane adhesive with semi-crystalline and highly crystalline polyesters
James Ward, Duesseldorf (DE); Timo Pasemann, Oberhausen (DE); Christian Holtgrewe, Duesseldorf (DE); and Anja Cosima Lindhorst, Duesseldorf (DE)
Assigned to Henkel AG & Co. KGaA, Duesseldorf (DE)
Filed by Henkel AG & Co. KGaA, Duesseldorf (DE)
Filed on Jun. 8, 2021, as Appl. No. 17/341,457.
Application 17/341,457 is a continuation of application No. PCT/EP2019/074449, filed on Sep. 13, 2019.
Claims priority of application No. 18211280 (EP), filed on Dec. 10, 2018.
Prior Publication US 2021/0292622 A1, Sep. 23, 2021
Int. Cl. C09J 175/06 (2006.01); C08G 18/12 (2006.01); C08G 18/42 (2006.01); C08G 18/62 (2006.01); C08G 18/72 (2006.01); C09J 7/35 (2018.01)

CPC C09J 175/06 (2013.01) [C08G 18/12 (2013.01); C08G 18/4202 (2013.01); C08G 18/6225 (2013.01); C08G 18/72 (2013.01); C09J 7/35 (2018.01); C08G 2170/00 (2013.01); C09J 2203/326 (2013.01)]

20 Claims

1. A polyurethane adhesive that is the reaction product of a mixture comprising:

at least one semi-crystalline polyester in an amount of from 15 to 25 wt %, based on the total weight of the mixture; and

at least one highly crystalline polyester in an amount of from 5 to 10 wt %, based on the total weight of the mixture, wherein:

the melting point of the at least one highly crystalline polyester is higher than the melting point of the at least one semi-crystalline polyester,

the at least one semi-crystalline polyester and the at least one highly crystalline polyester are present in the mixture in a weight ratio of from 7:1 to 3:1, and

the polyurethane adhesive further comprises:

an acrylate in an amount of from 10 to 30 wt %, based on the total weight of the mixture; and

an NCO-terminated compound in an amount of from 10 to 20 wt %, based on the total weight of the mixture.