	US 12,173,206 B2
	Alkali-dispersible hot melt pressure-sensitive adhesive
Ai Takamori, Osaka (JP)
Assigned to Henkel AG & CO. KGaA, Duesseldorf (DE)
Filed by Henkel AG & Co., KGaA, Dusseldorf (DE)
Filed on Jun. 10, 2022, as Appl. No. 17/806,313.
Application 17/806,313 is a continuation of application No. PCT/JP2020/046222, filed on Dec. 11, 2020.
Prior Publication US 2022/0372343 A1, Nov. 24, 2022
Int. Cl. C09J 7/38 (2018.01); B32B 7/12 (2006.01); C09J 153/02 (2006.01); B32B 15/04 (2006.01); B32B 17/06 (2006.01); B32B 27/28 (2006.01); B32B 27/32 (2006.01); B32B 27/36 (2006.01); B32B 29/00 (2006.01); C09J 7/35 (2018.01)

CPC C09J 7/387 (2018.01) [B32B 7/12 (2013.01); C09J 153/02 (2013.01); B32B 15/04 (2013.01); B32B 17/06 (2013.01); B32B 27/28 (2013.01); B32B 27/32 (2013.01); B32B 27/36 (2013.01); B32B 29/002 (2013.01); B32B 2519/00 (2013.01); C09J 7/35 (2018.01); C09J 2203/334 (2013.01); C09J 2301/408 (2020.08)]

4 Claims

1. An alkali-dispersible hot melt pressure-sensitive adhesive consisting of:

(A) a mixture of styrene-ethylene/butylene-styrene triblock copolymers having a styrene content less than 40% by mass;

(B) a tackifier resin which is a mixture of styrene/α-methylstyrene-based resins

(C) a first (C1) hydrogenated castor oil having a melting point of 45 to 120° C. and a second (C2) hydrogenated castor oil having a melting point of less than 40° C.;

(D) a Fischer-Tropsch wax or a mixture of Fischer-Tropsch waxes;

(E) a plasticizer which is a paraffin-based oil and/or a naphthalene-based oil; and

(F) at least one additive selected from stabilizer, antioxidant, ultraviolet absorbing agent or particle filler.