Title:
MOISTURE-CURABLE URETHANE HOT MELT RESIN COMPOSITION, MULTILAYER BODY AND SYNTHETIC ARTIFICIAL LEATHER
Document Type and Number:
WIPO Patent Application WO/2023/214494
Kind Code:
A1
Abstract:
The present invention provides a moisture-curable urethane hot melt resin composition which is capable of forming a cured product layer that has good initial adhesiveness, heat resistance, hydrolysis resistance, alcohol resistance and wear resistance. This moisture-curable urethane hot melt resin composition contains a urethane prepolymer having an isocyanate group, the urethane prepolymer being a reaction product of a polyol component and a polyisocyanate component. The polyol component contains a high molecular weight polyol component and a low molecular weight polyol component. The high molecular weight polyol component contains: at least one polyol (A) that is selected from the group consisting of SA polyester polyols (A1), 1,4-BD/AA polyester polyols (A2) having a number average molecular weight (Mn) of 8,000 or more, and 1,6-HD/AA polyester polyols (A3) having an Mn of 6,000 or more; and at least one polyol (B) that is selected from the group consisting of polyester polyols (B1) other than the polyol (A) and polyether polyols (B2). The low molecular weight polyol component contains a trifunctional polyol (D) that has three hydroxyl groups in each molecule, while having a molecular weight of 300 or less. The ratio between the polyol (A) and the trifunctional polyol (D) satisfies (trifunctional polyol (D) (mmol))/(polyol (A) (g)) = 0.14 to 55 mmol/g.
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Inventors:
OKUIZUMI KANNA (JP)
SASAKI KAZUYA (JP)
SASAKI KAZUYA (JP)
Application Number:
PCT/JP2023/014164
Publication Date:
November 09, 2023
Filing Date:
April 06, 2023
Export Citation:
Assignee:
DAINICHISEIKA COLOR CHEM (JP)
International Classes:
C08G18/66; B32B27/40; C09J175/04; D06N3/14
Domestic Patent References:
| WO2019221090A1 | 2019-11-21 |
Foreign References:
| JP2011225863A | 2011-11-10 | |||
| JP2011226047A | 2011-11-10 | |||
| JPH08157801A | 1996-06-18 | |||
| JPH08170068A | 1996-07-02 | |||
| JP2001525429A | 2001-12-11 |
Attorney, Agent or Firm:
KONDO Rieko et al. (JP)
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