BIO-BASED ADDITIVE FOR ASPHALT

• US 20200131403A1
• Filed: 10/23/2019
• Published: 04/30/2020
• Est. Priority Date: 10/25/2018
• Status: Active Grant

• Current Assignee: Poet Research Inc.
• Original Assignee: Poet Research Inc.
• Inventors: McCurdy, Alex T.
• Granted Patent: US 11,518,910 B2
• Time in Patent Office: Days
• CPC Class Codes: C08L 2555/34 Recycled or waste materials, e.g. reclaimed bitumen, asphalt, roads or pathways, recycled roof coverings or shingles, recycled aggregate, recycled tires, crumb rubber, glass or cullet, fly or fuel ash, or slag
• CPC Class Codes: C08L 2555/64 Oils, fats or waxes based upon fatty acid esters, e.g. fish oil, olive oil, lard, cocoa butter, bees wax or carnauba wax
• CPC Class Codes: C08L 91/00 Compositions of oils, fats or waxes; Compositions of derivatives thereof
• CPC Class Codes: C08L 95/00 Compositions of bituminous materials, e.g. asphalt, tar, pitch
• CPC Class Codes: C09D 191/00 Coating compositions based on oils, fats or waxes; Coating compositions based on derivatives thereof polishing compositions, ski waxes C09G
• CPC Class Codes: C09D 195/00 Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch
• CPC Class Codes: E04D 1/16 of ceramics, glass or concrete, with or without reinforcement
• CPC Class Codes: E04D 1/20 of plastics; of asphalt; of fibrous materials
• CPC Class Codes: E04D 1/22 of specified materials not covered by any one of groups E04D1/14 - E04D1/205, or of combinations of materials, where at least one is not covered by any one of groups E04D1/14 - E04D1/205

Abstract

Compositions comprising asphalt and corn oil are provided, as are the shingles made using the compositions, methods for making the compositions, and methods for making the shingles. The compositions comprise mixtures of asphalt and corn oil, and the mixtures are oxidized to attain desirable properties.

Claims

1. A shingle coating composition comprising an oxidized mixture of asphalt and about 0.1% to about 10% by weight corn oil.

2. A shingle comprising a base and a coating on the base, the coating comprising an oxidized mixture of asphalt and about 0.1% to about 10% by weight corn oil.

3. The shingle of claim 2, wherein the base is selected from the group consisting of fiberglass sheets, organic felts, ceramic fiber base, or polymer fiber material.

4. The shingle of claim 2, wherein the coating has a penetration value of at least about 15 dmm.

5. The shingle of claim 2, wherein the coating has a softening point between about 190°

F. and about 235°

F.

6. The shingle of claim 2, wherein the coating has a penetration value of about 17 dmm and softening point of about 211°

F.

7. The shingle of claim 2, wherein the coating exhibits a reduced viscosity relative to a shingle coating composition without corn oil.

8. The shingle of claim 2, wherein the flashpoint of the coating is reduced no more than about 10% relative to a coating without corn oil.

9. The shingle of claim 2, wherein the flashpoint of the coating is reduced no more than about 5% relative to a coating without corn oil.

10. A composition comprising a mixture of pre-oxidized asphalt and about 0.1% to about 10% by weight corn oil.

11. A method for forming a shingle coating composition, the method comprising:

(i) adding about 0.1% to about 10% corn oil to asphalt to form a mixture;

(ii) preheating the mixture to about 325°

F. to about 350°

F.;

(iii) stirring the mixture under low shear (paddle agitation); and

(iv) oxidizing the mixture to a desired softening point.

12. The method of claim 11, wherein the oxidizing is performed at about 500°

F.

13. The method of claim 11, wherein the shingle coating composition has a softening point between about 190°

F. and about 235°

F.

14. The method of claim 11, wherein the shingle coating composition has a penetration value of at least about 15 dmm.

15. The method of claim 11, wherein the shingle coating composition has a penetration value of about 17 dmm and softening point of about 211°

F.

16. The method of claim 11, wherein the shingle coating composition exhibits a reduced viscosity relative to a shingle coating composition without corn oil.

17. The method of claim 11, wherein the flashpoint of the shingle coating composition is reduced no more than about 10% relative to a shingle coating composition without corn oil.

18. A method for forming a shingle, the method comprising:

(i) coating a base with a shingle coating composition comprising an oxidized mixture of asphalt and about 0.1% to about 10% by weight corn oil; and

(ii) applying granular stone to the shingle coating composition.

19. The method of claim 18, wherein the base is selected from the group consisting of fiberglass sheets, organic felts, ceramic fiber base, or polymer fiber material.

20. The method of claim 18, wherein the shingle exhibits a reduction in mass loss relative to a shingle comprising a coating without corn oil when subjected to accelerated weathering by Xenon Arc Weatherometer according to ASTM G155 for 3000 hours.