Fast-setting polychloroprene contact adhesives

• US 6,086,997 A
• Filed: 07/07/1997
• Issued: 07/11/2000
• Est. Priority Date: 05/20/1997
• Status: Expired due to Term

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Wuerch, Daniel W., Patel, Vijay
• Primary Examiner(s): DAVIS, JENNA L
• Application Number:
  US08/888,715
• Time in Patent Office: 1,100 Days
• Field of Search: 428/355 BL, 524/405, 524/552
• US Class Current: 428/355.0BL
• CPC Class Codes: C08K 3/38 Boron-containing compounds
• CPC Class Codes: C08K 5/175 containing COOH-groups; Esters or salts thereof
• CPC Class Codes: C08L 11/02 Latex
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C08L 57/02 Copolymers of mineral oil hydrocarbons
• CPC Class Codes: C09J 111/02 Latex
• CPC Class Codes: Y10T 428/2883 including addition polymer of diene monomer [e.g., SBR, SIS, etc.]

Abstract

The invention relates to a storage stable, fast-setting, aqueous contact adhesive composition comprising an adhesive component and boric acid. The composition can further include an amino acid, such as glycine. The composition finds particularly preferred use for bonding substrates, such as foam, in the furniture industry.

Claims

1. A storage stable, fast-setting, aqueous contact adhesive composition comprising an adhesive component, an amino acid, and boric acid, wherein the adhesive component comprises at least one polychloroprene, is substantially free of acrylates, and wherein the composition is a one-part composition.

2. The adhesive composition according to claim 1, wherein the pH of the composition is from about 7 to about 9.

3. The adhesive composition according to claim 1, wherein the pH of the composition is from about 8 to about 8.9.

4. The adhesive composition according to claim 1, wherein the pH of the composition is from about 8.5 to about 8.8.

5. The adhesive composition according to claim 1, wherein the amino acid is glycine.

6. The adhesive composition according to claim 1, wherein the amino acid is present in an amount of about 1.5% to about 2.5% by weight based on dry weight of the adhesive component.

7. The adhesive composition according to claim 1, wherein the amino acid is present in an amount of about 0.5% to about 5% by weight based on dry weight of the adhesive component.

8. The adhesive composition according to claim 1, wherein the boric acid is present in an amount of about 0.1% to about 6% by weight based on dry weight of the adhesive component.

9. The adhesive composition according to claim 1, wherein the boric acid is present in an amount of about 0.8% to about 1.5% by weight based on dry weight of the adhesive component.

10. The adhesive composition according to claim 1, wherein the adhesive component is at least one anionic surfactant-stabilized polychloroprene dispersion or anionic/nonionic surfactant-stabilized polychloroprene blend dispersion.

11. The adhesive composition according to claim 1, wherein the adhesive component comprises at least one polychloroprene and at least one natural rubber, synthetic rubber, or combinations thereof.

12. The adhesive composition according to claim 1, wherein the adhesive composition is able to be applied to a substrate by spraying from one container.

13. The adhesive composition according to claim 1, wherein the composition has a set time of about five seconds or less.

14. The adhesive composition according to claim 1, wherein the composition is storage stable for at least 6 months at room temperature.

15. The adhesive composition according to claim 1, wherein the composition is storage stable for at least 8 months at room temperature.

16. The adhesive composition according to claim 1, wherein the pH of the composition is from about 8.5 to about 8.8 and the boric acid is present in an amount of about 0.8% to about 1.5% by weight based on dry weight of the adhesive component.

17. The adhesive composition according to claim 16, wherein the amino acid comprises glycine.

18. The adhesive composition according to claim 17, wherein the glycine is present in an amount of about 1.5% to about 2.5% by weight based on dry weight of the adhesive component.

19. The adhesive composition according to claim 18, wherein the composition is storage stable for at least 6 months at room temperature.

20. The adhesive composition according to claim 18, wherein the composition is storage stable for at least 8 months at room temperature.

21. The adhesive composition according to claim 20, wherein the adhesive component comprises at least one polychloroprene and at least one natural rubber, synthetic rubber, or combinations thereof.

22. The adhesive composition according to claim 18, wherein the adhesive component comprises at least one polychloroprene and at least one natural rubber, synthetic rubber, or combinations thereof.

23. The adhesive composition according to claim 1, wherein the boric acid is generated in-situ.

24. The one-part aqueous contact adhesive composition according to claim 1 wherein the composition is storage stable for at least 4 months at room temperature.

25. A substrate coated with the adhesive composition of claim 1.

26. A spray-coating apparatus containing an adhesive composition according to claim 1.