Title:
AQUEOUS ADHESIVE AND ADHESIVE SHEET
Document Type and Number:
WIPO Patent Application WO/2021/251465
Kind Code:
A1
Abstract:
This aqueous adhesive contains a (meth)acrylic copolymer (A) obtained by polymerization in the presence of an emulsifier, an alkali metal compound (B), and a tackifying resin (C), each in specific amounts. The (meth)acrylic copolymer (A) contains a (meth)acrylic acid alkyl ester monomer (a1) and a specific quantity of structural units derived from a carboxyl-group-containing monomer (a2). The alkali metal compound (B) is a compound that does not correspond to the emulsifier and does not have an alkyl group having 8 or more carbon atoms, a cyclic skeleton having 6 or more carbon atoms, or an alkylene oxide. The alkali metal content of the alkali metal compound is 10-100 mol per 100 mol of carboxyl groups in the (meth)acrylic copolymer.
Inventors:
OSHIMA YOSHITERU (JP)
Application Number:
PCT/JP2021/022137
Publication Date:
December 16, 2021
Filing Date:
June 10, 2021
Export Citation:
Assignee:
TOYO INK SC HOLDINGS CO LTD (JP)
TOYOCHEM CO LTD (JP)
TOYOCHEM CO LTD (JP)
International Classes:
C09J11/06; C09J7/38; C09J133/08
Foreign References:
| JPH07102500A | 1995-04-18 | |||
| JPH06271822A | 1994-09-27 | |||
| JP2018506613A | 2018-03-08 | |||
| JP2018506612A | 2018-03-08 | |||
| JP2017521532A | 2017-08-03 | |||
| JP2020084121A | 2020-06-04 |
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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