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US-12624250-B2 - Shingle roofing coating method and composition

US12624250B2US 12624250 B2US12624250 B2US 12624250B2US-12624250-B2

Abstract

A method for generating a shingle roofing coating is described. The method includes mixing 1% by weight to 20% by weight of an elastomeric polymer with an asphalt flux to generate a concentrate. The concentrate is then heated and mixed with an oxidized asphalt feedstock. The mixture of the concentrate and oxidized asphalt is then heated to generate the shingle roofing coating. The shingle roofing coating includes between 10% by weight and 30% by weight of the concentrate and between 0.1% by weight and 6% by weight of the elastomeric polymer.

Inventors

  • Joseph Randall Bruns
  • Hashem Hashemi
  • Moises Cisneros Rached

Assignees

  • ASPHALT SCIENCES LLC

Dates

Publication Date
20260512
Application Date
20230705

Claims (20)

  1. 1 . A method for generating a shingle roofing coating comprising: mixing an elastomeric polymer and an asphalt flux to generate a concentrate, wherein the concentrate includes 1% by weight to 20% by weight of the elastomeric polymer; heating the concentrate; mixing the concentrate with an oxidized asphalt feedstock; and heating the mixture of the concentrate and the oxidized asphalt feedstock to generate the shingle roofing coating, wherein the shingle roofing coating includes between 10% by weight and 30% by weight of the concentrate, and wherein the shingle roof coating includes between 0.1% by weight and 6% by weight of the elastomeric polymer.
  2. 2 . The method for generating the shingle roofing coating of claim 1 wherein the elastomeric polymer includes ethylene bis-stearamide (EBS) and trisodium phosphate (TSP).
  3. 3 . The method for generating the shingle roofing coating of claim 2 wherein the elastomeric polymer includes between 70% by weight and 90% by weight EBS and between 10% by weight and 30% by weight TSP.
  4. 4 . The method for generating the shingle roofing coating of claim 2 wherein the concentrate comprises: 0.7% by weight to 18% by weight of the EBS; and 0.1% by weight to 6% by weight of the TSP.
  5. 5 . The method for generating the shingle roofing coating of claim 2 wherein the shingle roofing coating comprises: 0.07% by weight to 5.4% by weight of the EBS; and 0.01% by weight to 1.8% by weight of the TSP.
  6. 6 . The method for generating the shingle roofing coating of claim 1 wherein the concentrate is heated to a temperature between 300° F. and 400° F. for between 15 minutes and 2 hours.
  7. 7 . The method for generating the shingle roofing coating of claim 1 wherein the concentrate is heated to a temperature between 350° F. and 370° F. for between 30 minutes and 1 hour.
  8. 8 . The method for generating the shingle roofing coating of claim 1 wherein the mixture of the concentrate and the oxidized asphalt is heated to a temperature between 350° F. and 380° F. for between 30 minutes and 1 hour.
  9. 9 . The method for generating the shingle roofing coating of claim 1 wherein the asphalt flux includes a mixture of non-roofing grade asphalts and reclaimed oils.
  10. 10 . The method for generating the shingle roofing coating of claim 1 wherein the asphalt flux includes a mixture of non-roofing grade asphalts and high flash refinery oils.
  11. 11 . A shingle roofing coating composition comprising: an oxidized asphalt feedstock; and a concentrate including an elastomeric polymer and an asphalt flux, wherein the concentrate includes 1% by weight to 20% by weight of the elastomeric polymer; wherein the shingle roofing coating composition includes between 10% by weight and 30% by weight of the concentrate, and wherein the shingle roofing coating composition includes between 0.1% by weight and 6% by weight of the elastomeric polymer.
  12. 12 . The shingle roofing coating composition of claim 11 wherein the elastomeric polymer includes ethylene bis-stearamide (EBS) and trisodium phosphate (TSP).
  13. 13 . The shingle roofing coating composition of claim 12 wherein the elastomeric polymer includes between 70% by weight and 90% by weight EBS and between 10% by weight and 30% by weight TSP.
  14. 14 . The shingle roofing coating composition of claim 12 wherein the concentrate comprises: 0.7% by weight to 18% by weight of the EBS; and 0.1% by weight to 6% by weight of the TSP.
  15. 15 . The shingle roofing coating composition of claim 12 wherein the shingle roofing concentrate comprises: 0.07% by weight to 5.4% by weight of the EBS; and 0.01% by weight to 1.8% by weight of the TSP.
  16. 16 . The shingle roofing coating composition of claim 11 wherein the asphalt flux includes a mixture of non-roofing grade asphalts and reclaimed oils.
  17. 17 . The shingle roofing coating composition of claim 11 wherein the asphalt flux includes a mixture of non-roofing grade asphalts and high flash refinery oils.
  18. 18 . The shingle roofing coating composition of claim 11 wherein the concentrate has a penetration of at least 100 dmm at 77° F.
  19. 19 . The shingle roofing coating composition of claim 11 wherein the oxidized asphalt feedstock has a penetration of less than 10 dmm at 77° F. and a softening point above 220° F.
  20. 20 . The shingle roofing coating composition of claim 11 wherein the shingle roofing coating has a penetration of at least 15 dmm at 77° F. and a softening point above 190° F.

Description

CROSS REFERENCE This patent application is a continuation-in-part of utility patent application Ser. No. 17/328,807, filed on May 24, 2021, entitled SHINGLE ROOFING COATING METHOD AND COMPOSITION, which is a continuation of utility patent application Ser. No. 16/853,548 (now U.S. Pat. No. 11,015,085), filed on Apr. 20, 2020, entitled SHINGLE ROOFING COATING METHOD AND COMPOSITION, which is a continuation of utility patent application Ser. No. 15/898,187 (now U.S. Pat. No. 10,626,295), filed on Feb. 15, 2018, entitled SHINGLE ROOFING COATING METHOD AND COMPOSITION, which is a continuation of utility patent application Ser. No. 14/880,586 (now U.S. Pat. No. 9,909,031), filed on Oct. 12, 2015, entitled SHINGLE ROOFING COATING METHOD AND COMPOSITION, which claims the benefit of provisional patent application 62/062,664, filed on Oct. 10, 2014, entitled SHINGLE ROOFING COATING METHOD AND COMPOSITION; all of which patent applications are incorporated by reference in this patent application filing. FIELD This invention relates to a shingle roofing coating method and composition. More specifically, the invention relates to oxidizing an asphalt feedstock and then reconstituting the asphalt feedstock with a pre-blended polymer and flux combination. BACKGROUND Asphalt is a complex colloid comprised of asphaltenes suspended in oils and resins commonly referred to as the maltene fraction. The chemical composition of the maltene fraction has a significant effect on the penetration, softening point, and viscosity of asphalt as lighter components are converted into larger molecules. Crude oils are a naturally occurring complex mixture composed predominantly of hydrogen and carbon containing compounds. They vary widely in relative amounts and characteristics of different hydrocarbons. There are various systems for classification of crude oil. One such system classifies oil as paraffin, asphaltic (naphthenic), or mixed-based depending upon the type of hydrocarbon present in the crude. Alternatively, crude oil may be classified as heavy crude (20-25 API gravity), refining crude (25-35 API gravity) or light crude (35-40 API gravity). Heavy crudes (20-25 API gravity) are favored for production of asphalts because these crudes are rich in asphaltenes. Petroleum asphalt may not conform to paving or industrial grade specifications and air blowing may be used to prepare the asphalt material for paving and roofing applications. The air blowing process includes bubbling air through an asphalt mixture to oxidize some of the constituents. Additionally, air blowing may also include the use of a catalyst to accelerate reactions. In U.S. Pat. No. 7,951,239, Trumbore describes the secondary addition of a wax to increase the softening point of non-coating grade asphalt to provide a penetration that is near the target of 15 dmm. Further, Trumbore requires careful monitoring to prevent the penetration from dropping below the target penetration of 15 dmm during the oxidation process to meet both the penetration and softening point specification of ASTM 3462. SUMMARY A method for generating a shingle roofing coating and a composition thereof is described. The method includes mixing an elastomeric polymer and an asphalt flux to generate a concentrate, where the concentrate includes 1% by weight to 20% by weight of the elastomeric polymer. The concentrate is then heated and mixed with an oxidized asphalt feedstock. The mixture of the concentrate and the oxidized asphalt feedstock is then heated to generate the shingle roofing coating. The resulting shingle roofing coating includes between 10% by weight and 30% by weight of the concentrate and between 0.1% by weight and 6% by weight of the elastomeric polymer. In one embodiment, the elastomeric polymer includes ethylene bis-stearamide (EBS) and trisodium phosphate (TSP). In another embodiment, the elastomeric polymer includes between 70% by weight and 90% by weight EBS and between 10% by weight and 30% by weight TSP. In a particular embodiment, the concentrate includes 0.7% by weight to 18% by weight of the EBS and 0.1% by weight to 6% by weight of the TSP. In another embodiment, the shingle roofing coating includes 0.07% by weight to 5.4% by weight of the EBS and 0.01% by weight to 1.8% by weight of the TSP. In yet another embodiment, the concentrate is heated to a temperature between 300° F. and 400° F. for between 15 minutes and 2 hours. In a further embodiment, the mixture of the concentrate and the oxidized asphalt is heated to a temperature between 350° F. and 380° F. for between 30 minutes and 1 hour. In another embodiment, the asphalt flux includes a mixture of non-roofing grade asphalts and reclaimed oils. In yet another embodiment, the asphalt flux includes a mixture of non-roofing grade asphalts and high flash refinery oils. In one embodiment, a roofing shingle coating composition produced by the method has a penetration of at least 15 dmm at 77° F. and a softening point above 190° F. I