METHOD AND DEVICE FOR SEALING AND INFLATING INFLATABLE ARTICLES, AND SEALING AGENT

Abstract

A method for sealing and inflating inflatable articles, in particular for sealing and inflating motor vehicle tires, wherein, by means of a compressor which is driven preferably by means of an electric motor, a sealing and pumping pressure is generated, wherein, by means of the sealing and pumping pressure, via a valve and distributor device for sealant and compressed gas and via compressed-air and sealant hoses between valve and distributor device and an entry valve or an inlet nozzle of the inflatable article, a sealant situated in a sealant vessel connected to the valve and distributor device is conveyed into the inflatable article and, at the same time, the inflatable article is inflated to a predefined operating pressure, wherein, by configuration of the corresponding parameters, of the sealant and of the device, in or downstream of the entry valve/the inlet nozzle, the sealant is at least partially atomized to form an aerosol by virtue of the sealant or the sealant-air mixture being converted, in the entry valve or in the inlet nozzle, into a turbulent flow with a Reynolds number Re≥22300.

Claims

1. A device for sealing and pumping, the device comprising: an electric compressor capable of generating air pressure comprising an electric motor, and a valve and distributor device comprising one or more ports, wherein the compressor comprises: a vessel comprising sealant connected to the valve and distributor via the one or more ports; and a compressed-air hose and a sealant hose connected to the one or more ports and connected to an entry valve or an inlet nozzle of an inflatable article; wherein the compressor is thermally insulated or the compressor comprises materials of low thermal conductivity.

2. The device of claim 1, wherein in or downstream of the entry valve or the inlet nozzle, when the electric motor is switched, compressed gas is formed resulting in conveyance of the sealant through the compressed-air hose and/or sealant hose, and wherein the sealant is then least partially atomized to form an aerosol by virtue of the sealant or the sealant-air mixture being converted into a turbulent flow with a Reynolds number R.sub.e≥2300, wherein the Reynolds number satisfies the following equation/in equation: $R_e=\sqrt{2}D\sqrt{p\frac{\rho }{{\eta }_0^2.Math.e^{\frac{2K}{T_0+\Delta T}}}}\ge 2300,$ wherein: T.sub.0 is ambient temperature, D is the entry valve or inlet nozzle diameter, ΔT is a difference between temperature in the entry valve or in the inlet nozzle and ambient temperature, p is the sealant or sealant-air mixture conveying pressure, ρ is the sealant or sealant-air mixture density, η.sub.0 is the sealant or sealant-air mixture intrinsic viscosity, and κ the sealant or sealant-air mixture temperature.

3. The device of claim 1, wherein the materials of low thermal conductivity are comprised of plastic.

4. The device of claim 1, wherein the valve and distributor device further comprise connections to an energy supply, a switch, and/or control and display device enabling operation of the valve and distributor device.

5. The device of claim 1, wherein the compressed-air hose and sealant hose are thermally insulated or are composed of materials of low thermal conductivity.

6. The device of claim 5, wherein the materials of low thermal conductivity are comprised of rubber or plastic.

7. The device of claim 1, wherein the inflatable article is a pneumatic vehicle tire.

8. The device of claim 1 further comprising a fan, wherein the fan cools the compressor in a manner dependent on the temperature difference ΔT of the entry valve or of the inlet nozzle.

9. The device of claim 1 further comprising a sealant, the sealant comprising: 2-25% latex, with regard to solids content, 2-25% tackifier, with regard to solids content, 2-40% one or more glycols with a vapor pressure of 5-15 Pa at 20° C. and a boiling point of 180° C. to 220° C., and 20-85% water.

10. The device of claim 9, wherein the tackifier is an adhesive resin.

11. The device of claim 10, wherein the adhesive resin is a rosin resin dispersion.

12. The device of claim 9, wherein the mean particle size of the tackifier is smaller than 0.4 m.

13. The device of claim 9 further comprising one or more surfactant sulfonates.

14. The device of claim 13, wherein the one or more surfactant sulfonates are anionic mono-sulfonates.

15. The device of claim 13, wherein the one or more surfactant sulfonates are anionic disulfonates.

16. The device of claim 13, wherein the one or more surfactant sulfonates are one or more alkyl aryl ether sulfates.

17. The device of claim 13, wherein the one or more surfactant sulfonates are anionic mono-sulfonates and one or more alkyl aryl ether sulfates.

18. The device of claim 13, wherein the one or more surfactant sulfonates are anionic disulfonates and one or more alkyl aryl ether sulfates.

19. The device of claim 13, wherein the concentration of surfactants is from 0.5 to 5.0%.

20. The device of claim 9, wherein the one or more glycols are one or more of 1,2-butanediol, 1,3-butanediol, 1,2-propanediol, and glycerin.

Description

BRIEF DESCRIPTION OF THE DRAWING

[0047] The invention will now be described with reference to the single FIGURE of the drawing (FIG. 1) which shows a diagram.

DESCRIPTION OF THE PREFERRED EMBODIMENTS OF THE INVENTION

[0048] FIG. 1 shows a preferred embodiment of the method parameters for converting the flow into the turbulent range with a Reynolds number R.sub.e≥2300. The illustration shows the Reynolds numbers for a sealant according to the invention versus the conveying pressure P and the temperature increase ΔT at the atomizer nozzle. For typical conveying pressures of 200 to 600 kPa the compressor must in this case thus realize an increase of the nozzle temperature of 40 to 60° C. The region enclosed by the dashed line denotes the parameter range for the method according to the invention; the preferred working range according to the invention is the hatched region situated in the boundary of the dashed line.

[0049] The increase of the nozzle temperature is, as presented above, realized by means of an adapted outlet temperature of the air compressor. What is critical for the present application is the cooling of the conveyed air on the path to the tire valve/tire entry valve. The compressed air is conducted via the sealant vessel and through a connecting hose. To ensure effective warming/heating of the nozzle, the stated method embodiments and device configurations are implemented.

[0050] It is understood that the foregoing description is that of the preferred embodiments of the invention and that various changes and modifications may be made thereto without departing from the spirit and scope of the invention as defined in the appended claims,