Two-component solvent-less adhesive composition

Patent metadata

Field	Value
Publication number	US-12054652-B2
Application number	US-202017436434-A
Country	US
Kind code	B2
Filing date	Mar 4, 2020
Priority date	Mar 5, 2019
Publication date	Aug 6, 2024
Grant date	Aug 6, 2024

Abstract

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

First claim

We claim:

1. A two-component solvent-less adhesive composition comprising the reaction product of:
(A) an isocyanate component; and
(B) a polyol component comprising a polyester-amide polycarbonate polyol.

2. The two-component solvent-less adhesive composition of claim 1 , wherein the polyol component further comprises a phosphate-terminated polyol.

3. The two-component solvent-less 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.

4. The two-component solvent-less 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.

5. The two-component solvent-less adhesive composition of claim 2 , wherein the polyol component comprises from 0.5 wt % to 35 wt % phosphate-terminated polyol, based on the total weight of the polyol component.

6. The two-component solvent-less adhesive composition of claim 1 , wherein the isocyanate component is an aliphatic isocyanate prepolymer.

7. The two-component solvent-less adhesive composition of claim 2 , wherein the phosphate-terminated polyol has the Structure (C)

wherein R 4 is selected from the group consisting of an ether group and a substituted ether group.

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-less 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 polypropylene film; and the laminate has a bond strength after chemical aging from 0.50 N/2.54 cm to 5.0 N/2.54 cm.

10. The laminate of claim 8 , wherein the first substrate is a polyethylene terephthalate film; and the laminate has a bond strength after the boil-in-bag test from 3.5 N/2.54 cm to 10.0 N/2.54 cm.

11. A method of forming a two-component solvent-less adhesive composition comprising:
(A) providing a polyol component comprising a polyester-amide polycarbonate polyol;
(B) providing an isocyanate component; and
(C) reacting the polyol component with the isocyanate component to form the two-component solvent-less 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

• C08G18/4615

  containing nitrogen · CPC title

• C08G18/3885

  Phosphate compounds · CPC title

• C08G18/12

  using two or more compounds having active hydrogen in the first polymerisation step · CPC title

• B32B27/36

  comprising polyesters · CPC title

• B32B27/32

  comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title