Polyurethane-based binder system

Patent metadata

Field	Value
Publication number	US-11292947-B2
Application number	US-201916681315-A
Country	US
Kind code	B2
Filing date	Nov 12, 2019
Priority date	May 19, 2017
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

A binder system, containing a special polyol mixture as a resin component, said polyol mixture containing at least one polyester based on a fatty acid dimer, a fatty acid trimer or the alcohols derived therefrom, and at least one polyisocyanates as a resin component and/or a NCO-terminated polyurethane prepolymer. The binder system can be used as an adhesive/sealing material, in particular as an adhesive for gluing various substrates.

First claim

The invention claimed is:

1. A binder system including:
(i) a resin component comprising,
(a) at least 10 wt. %, based on the total weight of the resin component, of a polyester polyol that is based on a fatty acid dimer, a fatty acid trimer, a diol derived from a fatty acid dimer or fatty acid trimer or a triol derived from a fatty acid dimer or fatty acid trimer and has a weight-average molecular weight (Mw) of at least 1,000 g/mol;
(b) at least 10 wt. %, based on the total weight of the resin component, of a polyester polyol that is different from (a) and has a weight-average molecular weight (Mw) of at least 1,000 g/mol;
(c) at least one OH-terminated polyolefin that is different from (a) and (b) and has a weight-average molecular weight (Mw) of at least 1,000 g/mol; and
(d) optionally at least 2 wt. % of a monomeric chain extender having at least 2 NCO-reactive groups;

(ii) a curing component comprising at least one of a polyisocyanate, an aromatic diisocyanate and an NCO-terminated polyurethane prepolymer.

2. The binder system according to claim 1 , wherein the polyester polyol (a) is the reaction product of fatty acid dimers and diols and optionally dicarboxylic acids which are different from the dimer fatty acids.

3. The binder system according to claim 1 , wherein the fatty acid dimer is obtained by dimerizing two C18 fatty acids and the polyester polyol (a) is the reaction product of the fatty acid dimer and C2-C6 diols and optionally C4-C12 dicarboxylic acids.

4. The binder system according to claim 1 , wherein the resin component comprises 25 wt. % to 50 wt. % of the polyester polyol (a), based on the total weight of the resin component.

5. The binder system according to claim 1 , wherein the polyester polyol (b) is a polycarbonate polyol.

6. The binder system according to claim 1 , wherein the polyester polyol (b) is a polycarbonate polyol having hexanediol and/or dodecanediol as a diol component.

7. The binder system according to claim 1 , wherein the resin component comprises 15 wt. % to 40 wt. % polyester polyol (b), based on the total weight of the resin component.

8. The binder system according to claim 1 , wherein the (c) OH-terminated polyolefin:
(1) is an OH-terminated polybutadiene or an OH-terminated hydrogenated polybutadiene; and
(2) is contained in the resin component in an amount in the range of 5 wt. % to 30 wt. %.

9. The binder system according to claim 1 , wherein the chain extender (d):
(1) is a monomeric aliphatic diol;
(2) is a monomeric aliphatic C6-C12 diol;
(3) is 1,9-nonanediol; and/or
(4) is contained in the resin component in amounts of up to 20 wt. %.

10. The binder system according to claim 1 , wherein the curing component
(1) comprises at least one aromatic diisocyanate, in an amount of from 90 to 100 wt. %, based on the curing component; or
(2) comprises at least 10 wt. % of the aromatic diisocyanate and up to 90 wt. % of the NCO-terminated prepolymer.

11. A two part adhesive comprising the binder system of claim 1 , wherein the adhesive has a first part including the resin component and a second part including the curing component.

12. An article comprising a first substrate having a surface, a second substrate having a surface adjacent the first substrate surface and a mixture of the resin component of claim 1 and the curing component of claim 1 disposed between and in contact with the surfaces.

13. The article of claim 12 wherein the first substrate is comprised of wood, plastic or metal and the second substrate is independently comprised of wood, plastic or metal.

14. Cured reaction products of a mixture of the resin component of claim 1 and the curing component of claim 1 .

15. The binder system according to claim 1 , wherein the (c) OH-terminated polyolefin is an OH-terminated polybutadiene.

16. A binder system consisting of a (i) resin component and a (ii) curing component, wherein:
(i) the resin component comprises,
(a) at least 10 wt. %, based on the total weight of the resin component, of a polyester polyol that is based on a fatty acid dimer, a fatty acid trimer, a diol derived from a fatty acid dimer or fatty acid trimer or a triol derived from a fatty acid dimer or fatty acid trimer and has a weight-average molecular weight (Mw) of at least 1,000 g/mol;
(b) at least 10 wt. %, based on the total weight of the resin component, of a polyester polyol that is different from (a) and has a weight-average molecular weight (Mw) of at least 1,000 g/mol;
(c) optionally at least one aliphatic OH-terminated polymer that is different from (a) and (b) and has a weight-average molecular weight (Mw) of at least 1,000 g/mol; and
(d) optionally at least 2 wt. % of a monomeric chain extender having at least 2 NCO-reactive groups;

(ii) the curing component comprises at least one of a polyisocyanate, an aromatic diisocyanate or both, wherein the curing component is free of an NCO-terminated polyurethane prepolymer.

17. The binder system according to claim 1 , wherein the (c) aliphatic OH-terminated polymer:
(1) is contained in the resin component in an amount in the range of 5 wt. % to 30 wt. %; and
(2) is an OH-terminated polybutadiene or an OH-terminated hydrogenated polybutadiene.

Assignees

• Henkel Ag & Co Kgaa

Inventors

• Schlingloff Nicole
• Engels Thomas
• Verbocket Kim
• Zoeller Thomas

Classifications

• C08G18/4063

  Mixtures of compounds of group C08G18/62 with other macromolecular compounds · CPC title

• C09J175/06 Primary

  from polyesters · CPC title

• C08G18/6208

  Hydrogenated polymers of conjugated dienes · CPC title

• C08G18/246 Primary

  containing also tin-carbon bonds · CPC title

• C08G18/44 Primary

  Polycarbonates · CPC title