Polyester Polyol-Based Adhesives on the Basis of Furandicarboxylic Acid Obtained from Renewable Raw Materials

Patent metadata

Field	Value
Publication number	US-2020239751-A1
Application number	US-202016852649-A
Country	US
Kind code	A1
Filing date	Apr 20, 2020
Priority date	Oct 25, 2017
Publication date	Jul 30, 2020
Grant date	—

Abstract

The present invention relates to adhesives which contain a polyester polyol on the basis of furandicarboxylic acid obtained from renewable raw materials, and to a method for bonding substrates, in particular film-like substrates, using said adhesive.

First claim

1 . An adhesive for bonding plastics and/or metal substrates, the adhesive comprising at least one polyester polyol based on furandicarboxylic acid (FDCA) and at least one compound containing NCO groups, wherein the furandicarboxylic acid is obtained from renewable raw materials.

2 . The adhesive according to claim 1 , wherein the polyester polyol is a reaction product of furandicarboxylic acid with a polyol.

3 . The adhesive according to claim 2 , wherein the polyol is a diol.

4 . The adhesive according to claim 3 , wherein the polyester polyol is obtained entirely from renewable raw materials.

5 . The adhesive according to claim 4 , wherein the proportion of polyester polyol from renewable raw materials is at least 80 wt. %, based on the total weight of the polyester polyols in the adhesive.

6 . The adhesive according to claim 1 , wherein the compound containing NCO groups is a polyisocyanate having two or more isocyanate groups.

7 . The adhesive according to claim 1 , wherein the compound containing NCO groups is selected from the group consisting of 1,5-naphthylene diisocyanate (NDI), 2,4′- or 4,4′-diphenylmethane diisocyanate (MDI), isomers of toluene diisocyanate (TDI), methylene triphenyl triisocyanate (MIT), hydrogenated MDI (H12MDI), tetramethylxylylene diisocyanate (TMXDI), 1-isocyanatomethyl-3-isocyanato-1,5,5-trimethylcyclohexane (IPDI), xylylene diisocyanate (XDI), hexane-1,6-diisocyanate (HDI), pentamethylene diisocyanate and dicyclohexylmethane diisocyanate, as well as oligomers and polymers thereof.

8 . The adhesive according to claim 1 , wherein the compound containing NCO groups is an NCO-terminated prepolymer.

9 . The adhesive according to claim 1 , wherein the adhesive contains solvents or is solvent-free or is present as a water-based dispersion.

10 . A method for bonding at least two substrates, wherein an adhesive according to claim 1 is applied to at least one substrate and said substrate is then joined together with at least one further substrate.

11 . The method according to claim 10 , wherein at least one of the substrates has a metal surface or a printed surface.

12 . The method according to claim 10 , wherein the adhesive is applied to a first film-like substrate and said substrate is then bonded to a second film-like substrate.

13 . The method according to claim 10 , wherein the adhesive is applied in an amount of from 1 to 100 g/m 2 .

14 . An article obtained using the method according to claim 10 .

15 . A food package obtained using the method according to claim 10 .

Assignees

• Henkel Ag & Co Kgaa

Inventors

• Brandt Adrian
• Beck Horst
• Schroeder Kerstin
• Kux Alexander
• Bankmann Dennis
• Garmann Helga
• Tomke Stefan
• Pasemann Timo
• Russbuelt Kerstin

Classifications

• C09J2301/312

  parameters being the characterizing feature · CPC title

• C09J175/06 Primary

  from polyesters · CPC title

• C08G18/4258

  derived from polycarboxylic acids containing at least one ether group and polyols · CPC title

• C08G18/7671

  containing only one alkylene bisphenyl group · CPC title

• B32B15/20

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