US 12,291,660 B2
Method for preparing pressure-sensitive adhesive composition, method for producing protective sheet and method for producing glass unit
Kosuke Yonezaki, Ibaraki (JP); Hakaru Horiguchi, Ibaraki (JP); and Yuta Shimazaki, Ibaraki (JP)
Assigned to NITTO DENKO CORPORATION, Osaka (JP)
Appl. No. 17/418,390
Filed by NITTO DENKO CORPORATION, Ibaraki (JP)
PCT Filed Dec. 23, 2019, PCT No. PCT/JP2019/050314
§ 371(c)(1), (2) Date Jun. 25, 2021,
PCT Pub. No. WO2020/137953, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 2018-246231 (JP), filed on Dec. 27, 2018.
Prior Publication US 2022/0064494 A1, Mar. 3, 2022
Int. Cl. C09J 7/38 (2018.01); B32B 17/10 (2006.01); B32B 27/30 (2006.01); C03C 23/00 (2006.01); C08F 220/06 (2006.01); C08F 220/18 (2006.01); C08K 5/17 (2006.01); C08K 5/353 (2006.01); C09J 7/24 (2018.01)
CPC C09J 7/385 (2018.01) [B32B 17/10 (2013.01); B32B 27/308 (2013.01); C03C 23/0075 (2013.01); C08F 220/06 (2013.01); C08F 220/1804 (2020.02); C08F 220/1808 (2020.02); C08K 5/17 (2013.01); C08K 5/353 (2013.01); C09J 7/243 (2018.01); B32B 2250/02 (2013.01); B32B 2255/205 (2013.01); B32B 2315/08 (2013.01); B32B 2333/08 (2013.01); B32B 2419/00 (2013.01); C09J 7/38 (2018.01); C09J 2203/37 (2020.08); C09J 2301/12 (2020.08); C09J 2301/302 (2020.08); C09J 2301/408 (2020.08); C09J 2301/414 (2020.08); C09J 2301/502 (2020.08); C09J 2400/163 (2013.01); C09J 2423/046 (2013.01); C09J 2433/00 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for producing a protective sheet applied to a surface of a Low-E layer on a glass plate, the method comprising:
a step of obtaining a pressure-sensitive adhesive composition comprising:
a step of obtaining an aqueous liquid, wherein the aqueous liquid has a chloride ion concentration of 0.6 μg/mL or higher and below 35 μg/mL, and
a step of obtaining a polymer-containing liquid comprising the aqueous liquid and a base polymer; and
a step of forming a pressure-sensitive adhesive layer from the pressure-sensitive adhesive composition,
wherein the pressure-sensitive adhesive composition is an acrylic pressure-sensitive adhesive composition comprising an acrylic polymer, as the base polymer, or a rubber-based pressure-sensitive adhesive composition comprising a rubber-based polymer as the base polymer, and
a glass transition temperature of a polymer contained in the pressure-sensitive adhesive composition is in a range of higher than −40° C. and 0° C. or lower.