Title:
SOLUTION CONTAINING HYDROXYL-TERMINATED URETHANE PREPOLYMER, PRODUCTION METHOD FOR SOLUTION CONTAINING HYDROXYL-TERMINATED URETHANE PREPOLYMER, ADHESIVE, ADHESIVE SHEET, AND PRODUCTION METHOD FOR ADHESIVE SHEET
Document Type and Number:
WIPO Patent Application WO/2020/230648
Kind Code:
A1
Abstract:
Provided is a solution that contains a hydroxyl-terminated urethane prepolymer. The solution is for use in an adhesive, uses a reduced amount of an organic solvent, has a relatively high solid component concentration, and has a relatively low viscosity. Also provided is an adhesive that uses a reduced amount of an organic solvent, has a relatively high solid component concentration, and has a relatively low viscosity when applied and therefore has favorable application suitability. This solution that contains a hydroxyl-terminated urethane prepolymer is for an adhesive and includes a hydroxyl-terminated urethane prepolymer (UPH) that is the product of a reaction between: at least one type of active-hydroxyl-group-containing compound (HX) that has a plurality of active hydroxyl groups per molecule thereof; and at least one type of polyisocyanate (N). The solid component concentration of the solution is at least 80 mass%, and the viscosity of the solution at 25° after standing for one hour at 25°C immediately after being prepared is no greater than 8000 mPa·s. This adhesive includes: the solution that contains a hydroxyl-terminated urethane prepolymer; and a polyfunctional isocyanate compound (I).
Inventors:
SAITO SHUHEI (JP)
TONE YOSHITAKA (JP)
TONE YOSHITAKA (JP)
Application Number:
PCT/JP2020/018276
Publication Date:
November 19, 2020
Filing Date:
April 30, 2020
Export Citation:
Assignee:
TOYO INK SC HOLDINGS CO LTD (JP)
TOYOCHEM CO LTD (JP)
TOYOCHEM CO LTD (JP)
International Classes:
B05D5/10; B05D7/00; B05D7/24; B32B27/00; B32B27/18; B32B27/22; B32B27/26; B32B27/40; C08G18/12; C09J7/38; C09J11/06; C09J175/04
Domestic Patent References:
| WO2007091643A1 | 2007-08-16 |
Foreign References:
| JP2018016730A | 2018-02-01 | |||
| JP2006182795A | 2006-07-13 | |||
| JP2014028877A | 2014-02-13 | |||
| JP2017222746A | 2017-12-21 |
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
Download PDF:
Previous Patent: ACHROMATIC POLARIZER, ACHROMATIC POLARIZING PLATE USING SAME, AND DISPLAY DEVICE
Next Patent: GLASS
Next Patent: GLASS