REACTION ADHESIVE

• US 20090286919A1
• Filed: 05/20/2009
• Published: 11/19/2009
• Est. Priority Date: 11/24/2006
• Status: Abandoned Application

• Current Assignee: Henkel AG & Co KGaA
• Original Assignee: Henkel AG & Co KGaA
• Inventors: Gentschev, Pavel, Möller, Thomas, Meckel-Jonas, Claudia, Kollbach, Guido
• Application Number:
  US12/469,161
• Publication Number:
  US 20090286919A1
• Time in Patent Office: Days
• US Class Current: 524/523
• CPC Class Codes: C08G 18/42 Polycondensates having carboxylic or carbonic ester groups in the main chain
• CPC Class Codes: C08G 18/5024 containing primary and/or secondary amino groups
• CPC Class Codes: C08G 18/6423 Polyalkylene polyamines; polyethylenimines; Derivatives thereof polyamides or polyesteramides C08G18/60
• CPC Class Codes: C08G 18/672 Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
• CPC Class Codes: C08G 18/7671 containing only one alkylene bisphenyl group
• CPC Class Codes: C08J 2367/02 Polyesters derived from dicarboxylic acids and dihydroxy compounds; C08J2367/06 takes precedence
• CPC Class Codes: C08J 5/125 Adhesives in organic diluents
• CPC Class Codes: C09J 175/06 from polyesters
• CPC Class Codes: C09J 201/02 characterised by the presence of specified groups , e.g. terminal or pendant functional groups

Abstract

A two-component bonding agent system, comprising (a) a polymer with at least two Michael acceptor groups with an average molecular weight of from 1,000 g/mol to 1,000,000 g/mol, (b) a polymer or oligomer with at least two primary or secondary amino groups or blocked amino groups, and (c) optionally, additive, auxiliary and/or catalyst, is described.

The adhesive made from the two-component bonding agent systems is useful for composite films, particularly suited for packaging foodstuffs and luxury foods and medicinal products.

Claims

1. A two-component bonding agent system comprising:

(a) a component A comprising at least one polymer having

i) at least two Michael acceptor groups and

ii) a number average molecular weight (M_n) of from 1,000 g/mol to 1,000,000 g/mol;

(b) a component B comprising at least one polymer or oligomer having at least two amino groups, wherein the amino groups are primary, secondary or blocked amino groups; and

(c) optionally an additive, auxiliary and/or catalyst.

2. The two-component bonding agent system according to claim 1, wherein the Michael acceptor groups are located terminally on the polymer in the component A.

3. The two-component bonding agent system according to claim 1, wherein the Michael acceptor groups are statistically distributed over the polymer in the component A.

4. The two-component bonding agent system according to claim 1, wherein the polymer in component A has side chains and the Michael acceptor groups are located on said side chains.

5. The two-component bonding agent system according to claim 1, wherein the Michael acceptor groups in the component A are α

,β

-unsaturated keto groups or ester groups.

6. The two-component bonding agent system according to claim 5, wherein the Michael acceptor groups in the component A are C₃ to C₁₂ mono- or di-carboxylic acid ester groups.

7. The two-component bonding agent system according to claim 1, wherein the polymer in the component A has a molecular weight of from 1,500 to 100,000 g/mole.

8. The two-component bonding agent system according to claim 1, wherein the amino groups of the polymer or oligomer in the component B are terminal primary amino groups.

9. The two-component bonding agent system according to claim 1, wherein the amino groups of the polymer or oligomer in the component B are blocked amino groups.

10. The two-component bonding agent system according to claim 1, wherein the polymer or oligomer in the component B is at least a two-functionally substituted polyether amine.

11. The two-component bonding agent system according to claim 1, wherein the molecular weight of the polymer or oligomer in the component B is from 60 to 2,000,000 g/mol.

12. The two-component bonding agent system according to claim 1, wherein the component B comprises a mixture of:

(a) a component B1 which is a alkylenediamine and/or cycloalkylenediamine; and

(b) a component B2 which is an amino functionalized polyalkylene glycol.

13. The two-component bonding agent system according to claim 12, wherein the component B further comprises a component B3 which has at least one primary amino group and a molecular weight of from 50 to 5,000 g/mol.

14. The two-component bonding agent system according to claim 1, wherein the ratio of the Michael acceptor group in the component A to the amino groups in the polymer or oligomer in the component B is between 3:

1 to 1;

5.

15. The two-component bonding agent system according to claim 14, wherein the ratio of the Michael acceptor group in the component A to the amino groups in the polymer or oligomer in the component B is between 2:

1 to 1;

2.5.

16. The two-component bonding agent system according to claim 1, wherein the catalyst is a Lewis or Brö

nstedt base with a pKa value of conjugated acid greater than 10, and said catalyst comprises up to 5 wt % of the total system.

17. The two-component bonding agent system according to claim 1, wherein the component A further comprises polyunsaturated carboxylic acid esters with molecular weights below 500 g/mole.

18. An article comprising the two-component bonding agent system of claim 1.

19. The article of claim 18 which is a composite film.