Two-component solvent-based adhesive composition

Patent metadata

Field	Value
Publication number	US-11746267-B2
Application number	US-202017436515-A
Country	US
Kind code	B2
Filing date	Mar 4, 2020
Priority date	Mar 5, 2019
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

The present disclosure provides a two-component solvent-based adhesive composition. The two-component solvent-based adhesive composition contains the reaction product of (A) an isocyanate component; (B) a polyol component containing a polyester-amide polycarbonate polyol; and (C) a solvent. The present disclosure also provides a method of forming the two-component solvent-based adhesive composition.

First claim

The invention claimed is:

1. A two-component solvent-based adhesive composition comprising the reaction product of:
(A) an isocyanate component;
(B) a polyol component comprising a polyester-amide polycarbonate polyol; and
(C) a solvent, wherein the polyol component further comprises a phosphate-terminated polyol.

2. The two-component solvent-based adhesive composition of claim 1 , wherein the polyester-amide polycarbonate polyol has a number average molecular weight (Mn) from 500 g/mol to 8,000 g/mol.

3. The two-component solvent-based adhesive composition of claim 1 , wherein the polyester-amide polycarbonate polyol comprises less than 55 wt % species having a weight average molecular weight (Mw) less than 500 g/mol.

4. The two-component solvent-based adhesive composition of claim 1 , wherein the polyester-amide polycarbonate polyol comprises the reaction product of adipic acid, 1,2-propanediol, neopentyl glycol, 1,6-hexanediol, and poly(1,4-butanediol-carbonate), and ethylenediamine.

5. The two-component solvent-based adhesive composition of claim 1 , wherein the phosphate-terminated polyol has the Structure (C)

wherein R 6 is selected from the group consisting of an ether group and a substituted ether group.

6. The two-component solvent-based adhesive composition of claim 1 , wherein the polyol component comprises from 0.5 wt % to 35 wt % phosphate-terminated polyol, based on the total weight of the polyol component.

7. The two-component solvent-based adhesive composition of claim 1 , wherein the isocyanate component is an aromatic isocyanate prepolymer.

8. A laminate comprising
a first substrate;
a second substrate; and
an adhesive layer between the first substrate and the second substrate, the adhesive layer formed from the two-component solvent-based adhesive composition of claim 1 .

9. The laminate of claim 8 , wherein the first substrate is a metal foil film and the second substrate is a low density polyethylene film; and the laminate has a bond strength after the boil-in-bag test from 8.73 N/2.54 cm to 20.0 N/2.54 cm.

10. The laminate of claim 8 , wherein the first substrate is a polyethylene terephthalate film and the second substrate is a polypropylene film; and the laminate has a bond strength after one day from 10.0 N/2.54 cm to 20.0 N/2.54 cm.

11. A method of forming a two-component solvent-based adhesive composition of claim 1 comprising reacting the polyol component with the isocyanate component in the presence of the solvent to form the two-component solvent-based adhesive composition.

12. The method of claim 11 comprising providing the polyol component comprising
(i) the polyester-amide polycarbonate polyol; and
(ii) a phosphate-terminated polyol.

Assignees

• Dow Global Technologies Llc
• Rohm & Haas

Inventors

• Li Tuoqi
• Zupancic Joseph J
• Yonkey Matthew M
• Clark Paul G
• Schmidt Thorsten
• Kawamoto Ken
• Li Wenwen

Classifications

• C09J175/12 Primary

  from compounds containing nitrogen and active hydrogen, the nitrogen atom not being part of an isocyanate group · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B15/085

  comprising polyolefins · CPC title

• B32B15/20

  comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)} · CPC title

• B32B27/08

  of synthetic resin · CPC title