Title:
URETHANE ADHESIVE AND ADHESIVE SHEET
Document Type and Number:
WIPO Patent Application WO/2019/194157
Kind Code:
A1
Abstract:
The present invention, in view of the above circumstances, addresses the problem of providing an adhesive composition capable of forming a surface-protective film that suppresses changes in the surface properties of optical members and various substrates before and after peeling. This adhesive composition contains a urethane resin (A) and a curing agent (B), wherein the adhesive composition is characterized in that: the urethane resin (A) is a reaction product of a compound (a1) having two or more groups that have an active hydrogen atom, and a polyisocyanate (a2); the compound (a1) having two or more groups that have an active hydrogen atom contains a polyether polyol in which the proportion of C4 or higher oxyalkylene units is 10% by mass or more; and the proportion of components having a maximum value in the weight-average molecular weight range of 2,000-6,000 is 5% by mass or less in 100% by mass of the urethane resin (A).
Inventors:
HIGESHIRO TOMOKAZU (JP)
CHIYONOBU KAZUHIKO (JP)
SATO KOJI (JP)
CHIYONOBU KAZUHIKO (JP)
SATO KOJI (JP)
Application Number:
PCT/JP2019/014583
Publication Date:
October 10, 2019
Filing Date:
April 02, 2019
Export Citation:
Assignee:
DAINIPPON INK & CHEMICALS (JP)
International Classes:
C09J175/08; C09J7/38; C09J11/06
Foreign References:
| JP2018053146A | 2018-04-05 | |||
| JP2017222746A | 2017-12-21 | |||
| JP2017105866A | 2017-06-15 | |||
| JP2017008314A | 2017-01-12 | |||
| JP6256648B1 | 2018-01-10 |
Attorney, Agent or Firm:
OGAWA Shinji (JP)
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