US 12,104,093 B2
Adhesive agent and adhesive tape using said adhesive agent
Yuto Honda, Tokyo (JP); Fumio Ogata, Chiba (JP); Daisuke Yoshimura, Chiba (JP); and Syota Sawamura, Chiba (JP)
Appl. No. 17/253,045
Filed by DENKA COMPANY LIMITED, Tokyo (JP)
PCT Filed Jul. 4, 2019, PCT No. PCT/JP2019/026679
§ 371(c)(1), (2) Date Dec. 16, 2020,
PCT Pub. No. WO2020/026697, PCT Pub. Date Feb. 6, 2020.
Claims priority of application No. 2018-146789 (JP), filed on Aug. 3, 2018.
Prior Publication US 2021/0261834 A1, Aug. 26, 2021
Int. Cl. C09J 7/32 (2018.01); C09J 7/24 (2018.01); C09J 7/38 (2018.01); C09J 153/02 (2006.01)
CPC C09J 153/02 (2013.01) [C09J 7/245 (2018.01); C09J 7/387 (2018.01); C09J 2427/006 (2013.01); C09J 2453/00 (2013.01); Y10T 428/2883 (2015.01)] 7 Claims
 
1. An emulsion-based adhesive comprising:
a styrene-butadiene rubber;
a natural rubber; and
a tackifier, wherein
a gel fraction of the styrene-butadiene rubber is 31 to 60% by mass,
a content of the natural rubber with respect to 100 parts by mass of the styrene-butadiene rubber is 10 to 35 parts by mass,
a content of the tackifier with respect to 100 parts by mass of the styrene-butadiene rubber is 100 to 150 parts by mass, and
a ratio of a styrene monomer unit in a total amount of the styrene-butadiene rubber and the natural rubber contained in the adhesive is 5 to 15% by mass.