Adhesive formulation and also method for the treatment of reinforcing inserts

Patent metadata

Field	Value
Publication number	US-9771502-B2
Application number	US-93769609-A
Country	US
Kind code	B2
Filing date	Apr 6, 2009
Priority date	Apr 14, 2008
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

The present invention relates to an adhesive formulation in the form of an aqueous dispersion with a solids content of 10 to 40% by weight relative to the adhesive formulation, for the treatment of reinforcing inserts for the production of reinforced polymer products, 100% by weight of the solids containing
a) 1 to 20% by weight of a bisphenol A epoxy novolak, b) 0 to 20% by weight of an entirely or partially blocked isocyanate, c) 60 to 92% by weight of a resorcinol formaldehyde latex (RFL).

First claim

The invention claimed is:

1. An adhesive formulation in the form of an aqueous dispersion with a solids content of 10 to 40% by weight relative to the adhesive formulation, which is suitable for the treatment of reinforcing inserts for the production of reinforced polymer products,
wherein 100% by weight of the solids containing
a) 14.5 to 20% by the weight of a bisphenol A epoxy novolak,
b) 14.5 to 20% by the weight of an entirely of partially blocked isocyanate, and
c) 60 to 71% by weight of a resorcinol formaldehyde latex.

2. An adhesive formulation according to claim 1 , wherein the solids content is 10 to 30% by weight.

3. An adhesive formulation according to claim 1 , wherein the solids content is 15 to 30% by weight.

4. An adhesive formulation according to claim 1 , wherein the solids content is 18 to 27% by weight.

5. An adhesive formulation according to claim 1 , wherein the solids proportion a) of bisphenol A epoxy novolak is 15 to 19% by weight.

6. An adhesive formulation according to claim 3 , wherein the solids proportion a) of bisphenol A epoxy novolak is 18 to 19% by weight.

7. An adhesive formulation according to claim 1 , wherein the solids proportion b) of the blocked or partially blocked isocyanate is 15 to 19% by weight.

8. An adhesive formulation according to claim 1 , wherein the isocyanate is blocked with lactam.

9. An adhesive formulation according to claim 1 , wherein the isocyanate is 4,4-diisocyanate diphenylmethane and/or toluene diisocyanate and/or naphthyl diisocyanate.

10. An adhesive formulation according to claim 1 , wherein the solids proportion c) of the RFL is 62-64% by weight.

11. An adhesive formulation according to claim 1 , wherein the formulation contains 0.0001 to 0.1 mol/kg of a metal compound as catalyst selected from the group consisting of zinc, strontium, cadmium, sodium, caesium, potassium, silver, barium, titanium, chromium, tin, antimony, manganese, iron, cobalt, nickel, cerium, uranium, copper, calcium, zinc, lead and zirconium.

12. An adhesive formulation according to claim 1 , further comprising one or more additive- and/or dispersion agents.

13. An adhesive formulation according to claim 1 , which has a pot life of at least 6 hours.

14. An adhesive formulation according to claim 1 , which has a pot life of at least 24 hours.

15. An adhesive formulation according to claim 1 , which has a pot life of at least 48 hours.

16. An adhesive formulation according to claim 1 , which has a pot life of at least 70 hours.

17. An adhesive formulation according to claim 1 , which has a pot life of at least 100 hours.

18. A method for treating a reinforcing insert suitable for the production of a reinforced polymer product, comprising applying to said reinforcing insert an adhesive formulation according to claim 1 .

19. A method according to claim 18 , wherein the adhesive formulation is produced directly before the treatment by mixing the individual components.

20. A method according to claim 18 , wherein the adhesive formulation is produced immediately before application by mixing component c) into the formulation already present as a mixture of components a) and b).

21. A method according to claim 18 , wherein a non-activated reinforcing insert is treated.

22. A method according to claim 18 , wherein the reinforcing insert is a tyre cord, conveyor cord or V-belt cord.

23. A method according to claim 18 , wherein a non-activated reinforcing insert made of polyester is treated.

Assignees

• Kurz Guenter
• Ems Patent Ag

Inventors

• Kurz Guenter

Classifications

• C08L63/04

  Epoxynovolacs · CPC title

• C08L2666/16

  Addition or condensation polymers of aldehydes or ketones according to C08L59/00 - C08L61/00; Derivatives thereof · CPC title

• C09J161/12

  with polyhydric phenols · CPC title

• C08K5/29

  Compounds containing {one or more} carbon-to-nitrogen double bonds · CPC title

• C09J163/04 Primary

  Epoxynovolacs · CPC title