	US 12,297,380 B2
	Method for producing adhesive layer composition for producing cooling sheet, method for producing cooling sheet, and cooling sheet
Kentaro Nakashima, Tosu (JP); Kento Ichinohe, Tosu (JP); Keiichiro Tsurushima, Tosu (JP); and Takaaki Yoshinaga, Tosu (JP)
Assigned to HISAMITSU PHARMACEUTICAL CO., INC., Tosu (JP)
Appl. No. 17/798,412
Filed by HISAMITSU PHARMACEUTICAL CO., INC., Tosu (JP)
PCT Filed Feb. 4, 2021, PCT No. PCT/JP2021/004144 § 371(c)(1), (2) Date Aug. 9, 2022, PCT Pub. No. WO2021/161895, PCT Pub. Date Aug. 19, 2021.
Claims priority of application No. 2020-021577 (JP), filed on Feb. 12, 2020.
Prior Publication US 2023/0093050 A1, Mar. 23, 2023
Int. Cl. C09J 133/02 (2006.01); C09J 7/30 (2018.01); C09J 11/06 (2006.01); C09J 11/08 (2006.01)

CPC C09J 133/02 (2013.01) [C09J 7/30 (2018.01); C09J 11/06 (2013.01); C09J 11/08 (2013.01); C09J 2203/358 (2020.08)]

10 Claims

1. A method for producing an adhesive layer composition for producing a cooling sheet including a backing layer, an adhesive layer, and a liner layer, the method comprising the step of:

mixing a composition to be mixed containing water, an alum, sodium edetate, a polyacrylic acid, and a neutralized polyacrylic acid such that a mixing temperature becomes 5 to 23° C., to obtain an adhesive layer composition, wherein

in the composition to be mixed,

a content of the water is 69 to 98.24% by mass relative to a total mass of the composition to be mixed,

a content of the alum is 0.18 to 0.42% by mass relative to the total mass of the composition to be mixed,

a content of the sodium edetate is 0.08 to 0.18% by mass relative to the total mass of the composition to be mixed, and

a mass ratio between the content of the alum and the content of the sodium edetate (the content of the alum: the content of the sodium edetate) is 1:1 to 5.25:1.