METHOD FOR BONDING AND BONDING MIXTURE

Abstract

A method for bonding and a bonding mixture for the bonding of a textile to a rubber component, wherein the bonding mixture comprises at least one latex and one formaldehyde-free crosslinker, wherein the crosslinker comprises at least one substance from at least one of oxazolidines, quinone dioximes, and/or maleinized polybutadienes.

Claims

1. A method for bonding a textile to a rubber component via a bonding mixture, the method comprising: providing the bonding mixture with at least one latex and one formaldehyde-free crosslinker, the crosslinker comprising at least one substance from at least one of the groups: oxazolidines, quinone dioximes, and/or maleinized polybutadienes; and applying the bonding mixture to bond the rubber component to the textile.

2. The method according to claim 1, wherein the crosslinker is free of resorcinol resin.

3. The method according to claim 1, wherein the latex is a vinylpyridine latex, styrene-butadiene latex, nitrile-butadiene latex, styrene-butadiene-vinylpyridine terpolymer, chloroprene or natural rubber.

4. The method according to claim 1, wherein the bonding mixture further comprises a wax.

5. The method according to claim 1, wherein the bonding mixture further comprises a tackifier.

6. The method according to claim 1, wherein the rubber component is a tire, a rubber chain for a crawler, a V-belt, a toothed belt, a hose, a molded hose, a conveyor belt or a rubberized garment.

7. A bonding mixture for bonding a textile to a rubber component, wherein the bonding mixture comprises at least one latex and one formaldehyde-free crosslinker, wherein the crosslinker comprises at least one substance from at least one of the groups: oxazolidines, quinone dioximes, and/or maleinized polybutadienes.

8. The bonding mixture according to claim 7, wherein the crosslinker is free from resorcinol resin.

9. The bonding mixture according to claim 7, wherein the latex is a vinylpyridine latex, styrene-butadiene latex, nitrile-butadiene latex, styrene-butadiene-vinylpyridine terpolymer, chloroprene or natural rubber.

10. The bonding mixture according to claim 7, wherein the bonding mixture further comprises a wax.

11. The bonding mixture according to claim 7, wherein the bonding mixture further comprises a tackifier.

Description

SUMMARY OF THE INVENTION

[0013] It is therefore an object of the present invention is to provide a method for bonding via a bonding mixture and an improved bonding mixture.

[0014] According to an exemplary embodiment of the invention, a bonding mixture for the bonding of a textile to a rubber component comprises at least one latex and one formaldehyde-free crosslinker, wherein the crosslinker comprises at least one substance from at least one of the groups: oxazolidines, quinone dioximes, and/or maleinized polybutadienes.

[0015] The crosslinker may include at least one substance from at least one of the groups: reactive but blocked aliphatic isocyanates, and/or thermally cross-linkable polyacrylates.

[0016] The substances of the abovementioned groups allow for a bonding mixture in which formaldehyde (methanal) can be eliminated.

[0017] Formaldehyde is considered to be carcinogenic. As a result of the elimination of the formaldehyde, the toxicity of the bonding mixture can be drastically reduced.

[0018] The bonding mixture according to the invention makes it possible to achieve adhesion of rubber components to textiles which is at least as durable, temperature-resistant and lasting as those obtained by the known RFL adhesive mixtures. In addition, the bonding mixture according to the invention is inexpensive.

[0019] In an embodiment of the invention, a resorcinol resin (1,3-dihydroxybenzene) can also be eliminated by using the mentioned substances in the crosslinker.

[0020] In this way, the toxic potential of the bonding mixture is further reduced.

[0021] A resorcinol resin can be contained in the crosslinker.

[0022] In an exemplary embodiment, the latex can be a vinylpyridine latex (VP), styrene-butadiene latex (SBR), nitrile-butadiene latex (NBR), styrene-butadiene-vinylpyridine terpolymer, chloroprene (CR) or natural rubber or a mixture of at least two of said components.

[0023] The bonding mixture may further comprise at least one wax and/or at least one tackifier.

[0024] According to an exemplary embodiment the invention, the bonding mixture can be used to bond, for example, a textile to a rubber component.

[0025] The bonding mixture can be prepared in a two-stage process. In a first stage, the crosslinker is prepared, which is subsequently mixed with latex. As a rubber component, SBR latex can be used in a blend with vinylpyridine latex. After a curing time (for example, about 6 hours), the bonding mixture is applied to the textile, pre-dried at elevated temperature (for example 100 C. to 130 C.) and finally reacted with the fibers of the textile in a main dryer at a further elevated temperature (for example 150 C. to 230 C.). At the same time, the crosslinker also reacts with the rubber component of the latex. A connection with the matrix of the rubber component is effected by covulcanization. Nitrile rubber latices may be used for polar rubber.

[0026] The bonding mixture can be used, for example, for producing a tire, a rubber chain for a crawler type vehicle, a V-belt, a toothed belt, a hose, a molded hose, a conveyor belt or a rubberized garment.

[0027] Moreover, the bonding mixture according to the invention can replace the known RFL system in any area of application when bonding a textile to a rubber component.

[0028] The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are to be included within the scope of the following claims.