(19)
(11) EP 3 597 716 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
20.05.2020 Bulletin 2020/21

(43) Date of publication:
22.01.2020 Bulletin 2020/04

(21) Application number: 18766779.5

(22) Date of filing: 09.03.2018
(51) International Patent Classification (IPC): 
C09J 7/38(2018.01)
C09J 133/06(2006.01)
 C09J 133/08(2006.01)
(86) International application number:
PCT/JP2018/009169
(87) International publication number:
WO 2018/168678 (20.09.2018 Gazette 2018/38)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 17.03.2017 JP 2017052419

(71) Applicant: Mitsubishi Chemical Corporation
Tokyo 100-8251 (JP)

(72) Inventors:
  • IKEBATA, Akira
    Chiyoda-ku, Tokyo 100-8251 (JP)
  • AKUI, Toshifumi
    Chiyoda-ku, Tokyo 100-8251 (JP)

(74) Representative: Kuhnen & Wacker Patent- und Rechtsanwaltsbüro PartG mbB 
Prinz-Ludwig-Straße 40A
85354 Freising
85354 Freising (DE)


(56) References cited: : 
   
       


    (54) ADHESIVE AGENT COMPOSITION, ADHESIVE AGENT, ADHESIVE TAPE, AND ADHESIVE TAPE FOR AIRPROOFING AND WATERPROOFING


    (57) An adhesive composition contains an acrylic resin (A) obtained by copolymerizing a copolymerization formulation (a), the copolymerization formulation (a) including predetermined proportions of: (a1) at least one selected from the group consisting of a (meth)acrylate having a C1 to C3 alkyl group, t-butyl (meth)acrylate, a cyclic structure-containing monomer, and a C3 to C10 vinyl ester monomer; (a2) a (meth)acrylate having a C4 to C24 alkyl group (excluding t-butyl (meth)acrylate); (a3) a terminal carboxyl-containing monomer having a specific structure; and (a4) (meth)acrylic acid. The adhesive composition provides firm adhesion to a higher-polarity adherend, a lower-polarity adherend, a poor-adhesion adherend such as of ethylene propylene diene rubber (EPDM), and a rough surface, and is excellent in holding force and adhesiveness in a high-temperature/high-humidity environment, with reduced susceptibility to deterioration in adhesiveness over time.