US 12,441,913 B2
Crosslinking adhesive composition and adhesive tape
Yasushi Tsuchiya, Shinagawa-ku (JP); and Miho Sampei, Shinagawa-ku (JP)
Assigned to TERAOKA SEISAKUSHO CO., LTD., Shinagawa-ku (JP)
Appl. No. 17/995,288
Filed by TERAOKA SEISAKUSHO CO., LTD., Shinagawa-ku (JP)
PCT Filed Feb. 2, 2021, PCT No. PCT/JP2021/003734
§ 371(c)(1), (2) Date Sep. 30, 2022,
PCT Pub. No. WO2021/199650, PCT Pub. Date Oct. 7, 2021.
Claims priority of application No. PCT/JP2020/014959 (WO), filed on Mar. 31, 2020.
Prior Publication US 2023/0159793 A1, May 25, 2023
Int. Cl. C08F 2/46 (2006.01); C08F 2/50 (2006.01); C08G 61/04 (2006.01); C09J 4/00 (2006.01); C09J 133/10 (2006.01)
CPC C09J 4/00 (2013.01) [C09J 133/10 (2013.01); C09J 2203/326 (2013.01); C09J 2301/312 (2020.08)] 9 Claims
 
1. A crosslinking adhesive composition, comprising an acrylic copolymer, having:
more than 3 parts by mass and less than 25 parts by mass of component (A1) consisting of a hydroxyl group-containing (meth)acrylate monomer represented by chemical formula (1) and a hydroxyl group-containing (meth)acrylate monomer represented by chemical formula (2);
more than 5 parts by mass and less than 25 parts by mass of component (A2) consisting of a carboxylic acid group-containing (meth)acrylate monomer;
more than 5 parts by mass and less than 30 parts by mass of component (A3) consisting of a (meth)acrylic acid alkyl ester monomer represented by chemical formula (3); and
more than 50 parts by mass and less than 90 parts by mass of component (A4) consisting of a (meth)acrylic acid alkyl ester monomer represented by chemical formula (4), based on 100 parts by mass consisting of a sum of components (A1) to (A4) wherein”

OG Complex Work Unit Chemistry
in the chemical formula (1):
R1 represents CH2═CH— or CH2═C(CH3)—;
R2 represents a hydrocarbon group or an oxygen atom-containing hydrocarbon group; and
x1 is an integer of 1 to 3;

OG Complex Work Unit Chemistry
in the chemical formula (2);
R3 represents CH2═CH— or CH2═C(CH3)—;
R4 represents a hydrocarbon group or an oxygen atom-containing hydrocarbon group, wherein a number of carbon atoms of R4 is greater than that of R2 in the chemical formula (1); and
x2 is an integer of 1 to 3;

OG Complex Work Unit Chemistry
in the chemical formula (3);
R5 represents CH2═CH— or CH2═C(CH3)—; and
R6 represents an alkyl group having 1 to 3 carbon atoms, a cyclohexyl group or an isobornyl group; and

OG Complex Work Unit Chemistry
in the chemical formula (4);
R7 represents CH2═CH— or CH2═C(CH3)—;
R8 represents an alkyl group having 4 to 12 carbon atoms.