US 12,305,093 B2
Pressure-sensitive adhesive articles
Atsushi Takashima, Ibaraki (JP); Yosuke Makihata, Ibaraki (JP); and Ginji Mizuhara, Ibaraki (JP)
Assigned to NITTO DENKO CORPORATION, Ibaraki (JP)
Appl. No. 16/970,660
Filed by NITTO DENKO CORPORATION, Ibaraki (JP)
PCT Filed Feb. 19, 2019, PCT No. PCT/JP2019/006149
§ 371(c)(1), (2) Date Sep. 17, 2020,
PCT Pub. No. WO2019/163788, PCT Pub. Date Aug. 29, 2019.
Claims priority of application No. 2018-028998 (JP), filed on Feb. 21, 2018; application No. 2018-125111 (JP), filed on Jun. 29, 2018; and application No. 2018-137760 (JP), filed on Jul. 23, 2018.
Prior Publication US 2021/0009864 A1, Jan. 14, 2021
Int. Cl. C09J 7/32 (2018.01); C09J 7/25 (2018.01); C09J 7/38 (2018.01)
CPC C09J 7/385 (2018.01) [C09J 7/255 (2018.01); C09J 2301/122 (2020.08); C09J 2301/124 (2020.08); C09J 2301/302 (2020.08); C09J 2301/502 (2020.08); C09J 2433/00 (2013.01); C09J 2467/006 (2013.01); Y10S 428/906 (2013.01); Y10T 428/2891 (2015.01)] 5 Claims
 
1. An adhesive article, comprising:
an adhesive body comprising an adhesive layer,
wherein
the adhesive layer has a gel content of 5-70%,
the adhesive layer comprises an acrylic adhesive,
the acrylic adhesive comprises an acrylic polymer as a base polymer,
the acrylic polymer is a product of polymerization of starting-material monomers comprising an acrylic monomer as a main component of the starting-material monomers,
the adhesive layer has an outer surface that, when the adhesive article is wound into a roll form, has surface portions that directly contact one another,
the adhesive layer includes a silane crosslinking agent,
an amount of the silane crosslinking agent per 100 parts by weight of the starting-material monomers is in the range of 0.005 to 0.03 parts to 0.03 parts by weight, and
the adhesive article, through 7-day storage at 40° C., has a change in the gel content of the adhesive layer of −5% to 5%.