US 12,065,596 B2
Adhesive tape
Takuya Hatakeyama, Tokyo (JP); and Kento Sakamoto, Tokyo (JP)
Assigned to MITSUBISHI CHEMICAL CORPORATION, Tokyo (JP)
Filed by Mitsubishi Chemical Corporation, Tokyo (JP)
Filed on Feb. 23, 2021, as Appl. No. 17/182,649.
Application 17/182,649 is a continuation of application No. PCT/JP2019/032549, filed on Aug. 21, 2019.
Claims priority of application No. 2018-166163 (JP), filed on Sep. 5, 2018; and application No. 2018-166164 (JP), filed on Sep. 5, 2018.
Prior Publication US 2021/0171803 A1, Jun. 10, 2021
Int. Cl. C09J 7/26 (2018.01); C08G 63/181 (2006.01); C08G 63/52 (2006.01); C09J 7/24 (2018.01); C09J 7/25 (2018.01); C09J 7/30 (2018.01)
CPC C09J 7/243 (2018.01) [C08G 63/181 (2013.01); C08G 63/52 (2013.01); C09J 7/245 (2018.01); C09J 7/25 (2018.01); C09J 7/26 (2018.01); C09J 7/30 (2018.01); C08G 2170/00 (2013.01); C09J 2301/12 (2020.08); C09J 2301/30 (2020.08); C09J 2400/24 (2013.01); C09J 2423/041 (2013.01); C09J 2423/101 (2013.01); C09J 2433/001 (2013.01); C09J 2467/00 (2013.01); C09J 2475/001 (2013.01)] 5 Claims
 
1. An adhesive tape comprising:
a substrate [I]; and
an adhesive agent layer of a polyester adhesive agent provided on at least one of opposite surfaces of the substrate [I];
wherein the substrate [I] is one selected from the group consisting of a polyolefin resin foam substrate, a urethane resin foam substrate, and an acrylic resin foam substrate;
wherein the polyolefin resin foam substrate has an apparent density of 10 to 200 kg/m3;
wherein the urethane resin foam substrate and the acrylic resin foam substrate have an apparent density of 200 to 1000 kg/m3;
wherein the polyester adhesive agent is made from a polyester adhesive agent composition [II] which comprises a polyester resin (A)
having a weight average molecular weight of 20,000 to 300,000, and having
a structural unit derived from a polyol and
a structural unit derived from
a polyvalent carboxylic acid compound containing an aromatic structure-containing compound in a proportion of not greater than 40 mol % of the polyvalent carboxylic acid compound;
wherein the polyester resin (A) has a structural unit derived from a hydrogenated polybutadiene structure-containing compound (a3);
wherein the structural unit derived from the hydrogenated polybutadiene structure-containing compound (a3) is present in a proportion of less than 10 wt. % with respect to 100 wt. % of the polyester resin (A),
wherein the polyester resin (A) has an acid value of not greater than 3 mg KOH/g, and
wherein the polyester resin (A) has an ester bond concentration of 7 to 9.5 mmol/g.