Primer compositions to toughen adhesive bonds

Patent metadata

Field	Value
Publication number	US-9051492-B2
Application number	US-201213429729-A
Country	US
Kind code	B2
Filing date	Mar 26, 2012
Priority date	Oct 16, 2009
Publication date	Jun 9, 2015
Grant date	Jun 9, 2015

Abstract

A primer composition including a toughening agent can be applied to a surface to be bonded using a separate curable adhesive composition. The primer composition toughens cured reaction products of the adhesive composition. In some embodiments the primer composition can also enhance reactivity of the curable adhesive composition.

First claim

What is claimed:

1. A primer composition consisting of a toughening agent component; a copper, chromium, manganese, iron, cobalt, nickel, or molybdenum activator component; and a reactive component.

2. The primer composition of claim 1 wherein the activator component is a copper compound.

3. The primer composition of claim 1 wherein the toughening agent component is a block copolymer.

4. The primer composition of claim 1 having liquid form.

5. The primer composition of claim 1 wherein the reactive component comprises a (meth)acrylate.

6. The primer composition of claim 1 wherein the reactive component is selected from the group consisting of a mono-functional (meth)acrylate, a poly-functional (meth)acrylate, a urethane acrylate, an acrylate of bisphenol A, a methacrylate of bisphenol A, and a glycidyl methacrylate of bisphenol A.

7. A primer composition consisting of a toughening agent component; a copper, chromium, manganese, iron, cobalt, nickel, or molybdenum activator component; a reactive component; and an amine co-activator component and/or a carrier component.

8. The primer composition of claim 7 wherein the amine co-activator compound is selected from the group consisting of tri-n-butylamine, dimethyl-p-toluidine, dimethyl-o-toluidine, diethyl-p-toluidine, 3,5-diethyl-1,2-dihydro-1-phenyl propylpyridine, and di-2-hydroxyethyl-p-toluidine.

9. A method of toughening an adhesive bond, comprising:
providing a first surface to be bonded;
depositing the primer composition of claim 1 on the first surface;
contacting the primer composition with a curable adhesive composition; and
exposing the adhesive composition to conditions appropriate to cure the adhesive composition so that the cured reaction products form a toughened adhesive bond;
wherein the toughened adhesive bond is less brittle than an adhesive bond formed by curing the curable adhesive composition on the surface without depositing the primer composition.

10. The method of claim 9 wherein the primer composition is applied as a liquid to the first surface.

11. The method of claim 9 wherein the curable adhesive composition is applied to a second surface to be bonded and the second surface with applied curable adhesive composition is contacted to the first surface with applied primer composition.

12. The method of claim 9 wherein the primer composition and the curable adhesive composition are both applied to the first surface to be bonded and a second surface is contacted to the first surface.

13. The method of claim 9 wherein the primer composition and the curable adhesive composition are mixed and the mixture is applied to the first surface to be bonded and a second surface is contacted to the first surface.

14. The method of claim 9 wherein the first surface to be bonded is aligned with a second surface to be bonded to form an interface between the first and second surfaces and the primer composition and the curable adhesive composition are applied to the interface.

15. The method of claim 9 wherein the surface is plastic.

16. A method of making a high pressure connection, the connection consisting essentially of a first tubular member, a second tubular member and cured reaction products of a radically curable composition, comprising:
providing the first tubular member having a female distal joint portion;
providing the second tubular member having a male distal joint portion;
applying the primer composition of claim 1 to one of the distal joint portions;
applying the curable composition to one of the distal joint portions;
sliding the second tubular member male distal joint portion into the first tubular member female distal joint portion; and
curing the curable composition to maintain the second tubular member male distal joint portion within the first tubular member female distal joint portion thereby forming the high pressure connection.

17. The method of claim 16 wherein the primer composition is applied to the female distal joint portion and the curable composition is applied to the male distal joint portion.

18. The method of claim 16 wherein the primer composition is applied to the female distal joint portion and the curable composition is applied to the female distal joint portion.

19. The method of claim 16 wherein the primer composition and the curable composition are applied to an interface between the female distal joint portion and the male distal joint portion.

20. A method of toughening an adhesive bond, comprising:
providing a first surface to be bonded;
depositing the primer composition of claim 2 on the first surface;
contacting the primer composition with a curable adhesive composition; and
exposing the adhesive composition to conditions appropriate to cure the adhesive composition so that the cured reaction products form a toughened adhesive bond;
wherein the toughened adhesive bond is less brittle than an adhesive bond formed by curing the curable adhesive composition on the surface without depositing the primer composition.

21. A method of making a high pressure connection, the connection consisting essentially of a first tubular member, a second tubular member and cured reaction products of a radically curable composition, comprising:
providing the first tubular member having a female distal joint portion;
providing the second tubular member having a male distal joint portion;
applying the primer composition of claim 7 to one of the distal joint portions;
applying the curable composition to one of the distal joint portions;
sliding the second tubular member male distal joint portion into the first tubular member female distal joint portion; and
curing the curable composition to maintain the second tubular member male distal joint portion within the first tubular member female distal joint portion thereby forming the high pressure connection.

Assignees

• Attarwala Shabbir
• Broderick Ifeanyi Chris
• Patel Prakash S
• Henkel IP & Holding GmbH

Inventors

• Attarwala Shabbir
• Broderick Ifeanyi Chris
• Patel Prakash S

Classifications

• C09J2400/226

  in the substrate · CPC title

• C09J2433/003

  in the primer coating · CPC title

• C09J4/00 Primary

  Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16} · CPC title

• C09J5/04

  involving separate application of adhesive ingredients to the different surfaces to be joined · CPC title