Dual action adhesive composition

Patent metadata

Field	Value
Publication number	US-9598619-B2
Application number	US-201314424807-A
Country	US
Kind code	B2
Filing date	Aug 30, 2013
Priority date	Aug 31, 2012
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

The present invention relates to an one-component adhesive composition, comprising a moisture cross-linking silyl modified polymer and an organoclay-based rheology controller being an alkyl ammonium salt modified mineral clay mixture. The present invention relates moreover to a two-component adhesive composition, comprising a first component A) comprising a moisture cross-linking polymer and an organoclay-based rheology controller; and a second water-based component B) that is reactive with component A) upon mixing thereof. The present invention moreover relates to a method of production of said adhesive composition.

First claim

The invention claimed is:

1. An adhesive composition, usable for activation by moisture, said adhesive composition comprising a moisture cross-linking polymer selected from the group consisting of silyl modified polymers (SMP), and an inactivated organoclay-based rheology controller being an alkyl ammonium salt-modified mineral clay mixture, wherein said composition is a two-component adhesive composition, comprising a component A) comprising the moisture cross-linking polymer and the organoclay-based rheology controller; and a component B) comprising water, wherein component A has a dynamic viscosity of between 20,000 and 40,000 Pas as measured at 23° C. at a shear rate of 0.1 sec −1 and/or a dynamic viscosity of between 800 and 1200 Pas as measured at 23° C. at a shear rate of 5.0 sec −1 .

2. The composition according to claim 1 , wherein said adhesive composition comprises water in an amount that is equal to or less than 0.5 w/w.%, based on the weight of said adhesive composition.

3. The composition according to claim 1 , wherein said rheology controller comprises water in an amount that is equal to or less than 0.5 w/w.%, based on the weight of said rheology controller.

4. The composition according to claim 1 , wherein said rheology controller present in inactivated form, is able to be reactivated by ambient moisture or component B).

5. The composition according to claim 1 , wherein the weight ratio of component A) to component B) is between 1:1 and 100:1.

6. A method of preparation of an adhesive composition according to claim 1 by combining two-components A) and B) of a two-component adhesive composition, wherein said moisture cross-linking polymer is cross-linked and/or cured by the addition of component B) to component A) and wherein said rheology controller present in component A) is reactivated by said component B).

7. The method according to claim 6 , wherein the early strength of the adhesive composition upon mixing of components A) and B) immediately after the substrates to be joined have been fitted together, is between 80 and 120 N/2000 mm 2 .

8. An adhesive composition according to claim 1 , wherein the moisture cross-linking polymer is a silyl-terminated polymer.

9. The composition according to claim 1 , wherein said adhesive composition comprises water in an amount that is equal to or less than 0.3 w/w.%, based on the weight of said adhesive composition.

10. The composition according to claim 1 , wherein said adhesive composition comprises water in an amount that is equal to or less than 0.1 w/w.%, based on the weight of said adhesive composition.

11. The composition according to claim 1 , wherein said rheology controller comprises water in an amount that is equal to or less than 0.3 w/w.%, based on the weight of said rheology controller.

12. The composition according to claim 1 , wherein said rheology controller comprises water in an amount that is equal to or less than 0.1 w/w.%, based on the weight of said rheology controller.

13. The composition according to claim 1 , wherein the weight ratio of component A) to component B) is between 10:1 to 60:1.

14. The composition according to claim 1 , wherein the weight ratio of component A) to component B) is between 30:1 to 50:1.

15. A kit of parts comprising two containers, wherein said two containers each contain a component of a two-component adhesive composition: a first container comprising component A) based on a moisture cross-linking polymer that is a silyl-modified polymer and comprising an organoclay-based rheology controller; and a second container comprising component B) comprising water, the said kit optionally further comprising compression means and optionally also a static mixing head, wherein said mixing head is capable of receiving component A from the first container and component B from the second container simultaneously, and wherein component A has a dynamic viscosity of between 20,000 and 40,000 Pas as measured at 23° C. at a shear rate of 0.1 sec −1 and/or a dynamic viscosity of between 800 and 1200 Pas as measured at 23° C. at a shear rate of 5.0 sec −1 .

16. A one-component dual action adhesive composition based on a moisture cross-linking polymer that is a silyl-modified polymer and further comprising a organoclay-based rheology controller; and composition showing dual action upon contact with moisture, being physical action by means of reactivation of said rheology controller after inactivation and chemical action by cross-linking and/or curing of said moisture cross-linking polymer, said adhesive composition having a dynamic viscosity of between 20,000 and 40,000 Pas as measured at 23° C. at a shear rate of 0.1 sec −1 and/or a dynamic viscosity of between 800 and 1200 Pas as measured at 23° C. at a shear rate of 5.0 sec −1 .

17. A two-component dual action adhesive composition based on two separate components A) and B), component A) being based on a moisture cross-linking polymer that is a silyl-modified polymer and further comprising a organoclay-based rheology controller; and component B) comprising water; said first component A) showing dual action upon addition of component B), the dual action being physical action by means of reactivation of said rheology controller after inactivation and chemical action by cross-linking and/or curing of said moisture cross-linking polymer, component A having a dynamic viscosity of between 20,000 and 40,000 Pas as measured at 23° C. at a shear rate of 0.1 sec −1 and/or a dynamic viscosity of between 800 and 1200 Pas as measured at 23° C. at a shear rate of 5.0 sec −1 .

Assignees

• Bostik Sa

Inventors

• Vosters Petrus Johannes Cornelius

Classifications

• C08G65/336

  containing silicon · CPC title

• C09J201/10

  containing hydrolysable silane groups · CPC title

• C09J171/02

  Polyalkylene oxides · CPC title

• C08K3/346

  Clay · CPC title

• C09J171/00 Primary

  Adhesives based on polyethers obtained by reactions forming an ether link in the main chain (based on polyacetals C09J159/00; based on epoxy resins C09J163/00; based on polythioether-ethers C09J181/02; based on polyethersulfones C09J181/06); Adhesives based on derivatives of such polymers · CPC title