Recycled crumb rubber coating
View Patent ↗The recycled crumb rubber coating is a corrosion-proof coating for piping and the like. The coating is formed from recycled crumb rubber mixed with an epoxy resin and a hardener. Crumb rubber is first mixed with a liquid epoxy resin. An agent for reducing the viscosity of the liquid epoxy resin may also be added. A hardener is then added to this mixture. Finally, powdered crumb rubber is added and mixed to form the recycled crumb rubber coating. The total crumb rubber forms about 23 wt % of the coating. If no viscosity reducing agent is added, then the liquid epoxy resin forms about 51.6 wt % of the coating. If the viscosity reducing agent is added, then the liquid epoxy resin forms about 50.1 wt % of the coating, and the viscosity reducing agent forms about 1.5 wt % of the coating. The hardener forms about 25.4 wt % of the coating.
1. A recycled crumb rubber coating composition, comprising:
about 23 wt % crumb rubber;
about 51.6 wt % liquid epoxy resin; and
about 25.4 wt % epoxy hardener.
2. The recycled crumb rubber coating composition as recited in claim 1 , wherein said liquid epoxy resin comprises a reaction mixture of bisphenol A, bisphenol F and epichlorohydrin.
3. The recycled crumb rubber coating composition as recited in claim 2 , wherein said hardener comprises an aliphatic polyamine hardener.
4. The recycled crumb rubber coating composition as recited in claim 1 , wherein said hardener comprises an aliphatic polyamine hardener.
5. The recycled crumb rubber coating composition as recited in claim 4 , wherein said liquid epoxy resin comprises a reaction mixture of bisphenol A, bisphenol F and epichlorohydrin.
6. A recycled crumb rubber coating composition, comprising:
about 23 wt % crumb rubber;
about 50.1 wt % liquid epoxy resin;
about 1.5 wt % of a viscosity reducing agent; and
about 25.4 wt % epoxy hardener.
7. The recycled crumb rubber coating composition as recited in claim 6 , wherein said liquid epoxy resin comprises a reaction mixture of bisphenol A, bisphenol F and epichlorohydrin.
8. The recycled crumb rubber coating composition as recited in claim 7 , wherein said hardener comprises an aliphatic polyamine hardener.
9. The recycled crumb rubber coating composition as recited in claim 8 , wherein said epoxy viscosity reducing agent comprises benzyl alcohol.
10. The recycled crumb rubber coating composition as recited in claim 6 , wherein said hardener comprises an aliphatic polyamine hardener.
11. The recycled crumb rubber coating composition as recited in claim 10 , wherein said liquid epoxy resin comprises a mixture of bisphenol A, bisphenol F and epichlorohydrin.
12. A method of making a recycled crumb rubber coating, comprising the steps of:
mixing crumb rubber with a liquid epoxy resin to form a first mixture; and
mixing the first mixture with a hardener to form the recycled crumb rubber coating;
wherein the recycled crumb rubber coating comprises about 23 wt % crumb rubber, about 51.6 wt % liquid epoxy resin, and about 25.4 wt % epoxy hardener.
13. The method of making a recycled crumb rubber coating as recited in claim 12 , further comprising the step of adding an epoxy viscosity reducing agent to the first mixture.
14. The method of making a recycled crumb rubber coating as recited in claim 13 , wherein the step of adding the epoxy viscosity reducing agent to the first mixture comprises adding benzyl alcohol to the first mixture.
15. The method of making a recycled crumb rubber coating as recited in claim 12 , wherein the step of mixing the crumb rubber with the liquid epoxy resin comprises mixing the crumb rubber with an epoxy resin comprising a reaction mixture of bisphenol A, bisphenol F and epichlorohydrin.
16. The method of making a recycled crumb rubber coating as recited in claim 15 , wherein the step of mixing the first mixture with the hardener comprises mixing the first mixture with an aliphatic polyamine hardener.
17. The method of making a recycled crumb rubber coating as recited in claim 12 , wherein the crumb rubber is mixed with the liquid epoxy resin for about one minute.
18. The method of making a recycled crumb rubber coating as recited in claim 17 , wherein the step of mixing the first mixture with the hardener comprises stirring the first mixture and the hardener for about three minutes.
19. The method of making a recycled crumb rubber coating as recited in claim 18 , further comprising the steps of:
adding powdered crumb rubber after the step of mixing the hardener with the first mixture; and
stirring the mixture for about five minutes after adding the powdered crumb rubber.