Bitumen composition

Patent metadata

Field	Value
Publication number	US-11453779-B2
Application number	US-201515125268-A
Country	US
Kind code	B2
Filing date	Mar 13, 2015
Priority date	Mar 13, 2014
Publication date	Sep 27, 2022
Grant date	Sep 27, 2022

Abstract

The invention is directed to a bitumen composition, to a paving, to a roofing, to a method for preparing a bitumen composition, to a method for increasing the stiffness of a bitumen composition, to a method of adjusting the physical properties of a bitumen composition, and to the use of a bitumen composition. The bitumen composition of the invention comprises a lignin compound or derivative thereof, wherein 10 wt. % or more by weight of said lignin compound or derivative thereof is molecularly dissolved in said bitumen composition.

First claim

The invention claimed is:

1. Bitumen composition comprising a lignin compound or derivative thereof, wherein 25 wt. % or more by weight of said lignin compound or derivative thereof is molecularly dissolved in said bitumen composition,
wherein the molecularly dissolved lignin compound or derivative thereof has an average particle size of 100 μm or less,
wherein said lignin compound or derivative thereof is a chemically modified lignin, and
wherein said chemically modified lignin is chemically modified with one or more groups selected from anhydrides, epoxy carrying reactants, and halide containing compounds.

2. Bitumen composition according to claim 1 , wherein said composition comprises 10 wt. % or more by weight of the bitumen composition of said lignin compound or derivative thereof.

3. Bitumen composition according to claim 1 , wherein said composition comprises 20 wt. % or more by weight of the bitumen composition of said lignin compound or derivative thereof.

4. Bitumen composition according to claim 1 , wherein said composition comprises 25-50 wt. % by weight of the bitumen composition of said lignin compound or derivative thereof.

5. Bitumen composition according to claim 1 , wherein said lignin compound or derivative thereof is substantially free of sulfur.

6. Bitumen composition according to claim 1 , wherein said lignin compound or derivative thereof is completely free of sulfur.

7. Bitumen composition according to claim 1 , wherein said chemically modified lignin compound comprises one or more units represented by formula (II) below

wherein
R represents a lignin residue;
R′ is selected from the group consisting of C 1-20 alkyl, C 2-20 alkenyl, (C 1-20 alkyl)-phenyl, (C 2-20 alkenyl)-phenyl, C 1-20 alkoxy, (C 1-20 alkoxy)-phenyl, C 3-6 cycloalkyl,
aryl-(C 1-6 alkyl), aryl-(C 2-6 alkenyl), and (C 1-4 alkyl)-aryl-(C 1-4 alkyl);
X 1 is OH or H; and
X 2 is OH or H, and X 2 is different from X 1 .

8. Bitumen composition according to claim 1 , wherein said lignin compound or derivative thereof has a bimodal distribution of molecular weight.

9. Bitumen composition according to claim 1 , wherein the lignin compound or derivative thereof comprises 1-5 wt. % based on total weight of the lignin compound or derivative thereof of a first component having a M n of 100,000-150,000 g/mol and 95-99 wt. % based on total weight of the lignin compound or derivative thereof of a second component having a M n of 1500-2000 g/mol.

10. Bitumen composition according to claim 1 , wherein 50 wt. % or more by weight of said lignin compound or derivative thereof is molecularly dissolved in said bitumen composition.

11. Bitumen composition according to claim 1 , wherein 75 wt. % or more by weight of said lignin compound or derivative thereof is molecularly dissolved in said bitumen composition.

12. Bitumen composition according to claim 1 , having a dynamic viscosity (η*) at 20° C. and 10 rad/s in the range of
1.0×10 4 -5.0×10 6 , as determined by dynamic shear rheometer.

13. Bitumen composition according to claim 1 ,
having a complex modulus G*:
at 20° C. and 1×10 −4 rad/s in the range of 1×10 1 -1×10 5 Pa,
at 20° C. and 1 rad/s in the range of 1×10 5 -1×10 8 Pa, and
at 20° C. and 1×10 5 rad/s in the range of 1×10 7 -1×10 9 Pa;

having a corresponding phase angle δ:
at 20° C. and 1×10 −4 rad/s in the range of 30-90°,
at 20° C. and 1 rad/s in the range of 50-80°, and
at 20° C. and 1×10 5 rad/s in the range of 10-40°,

as determined by dynamic shear rheometer.

14. Bitumen composition according to claim 1 , further comprising one or more selected from the group consisting of a filler, sand, and rubble.

15. Paving comprising a bitumen composition according to claim 1 .

16. Roofing comprising a bitumen composition according to claim 1 .

17. Method of preparing a bitumen composition comprising molecularly dissolving 25 wt. % or more by weight of a lignin compound or derivative thereof into a bitumen composition, wherein the molecularly dissolved lignin compound or derivative thereof has an average particle size of 100 μm or less, wherein said lignin compound or derivative thereof is a chemically modified lignin, and wherein said chemically modified lignin is chemically modified with one or more groups selected from anhydrides, epoxy carrying reactants, and halide containing compounds.

18. Method according to claim 17 , wherein said lignin compound or derivative thereof is substantially or completely free of sulfur.

Assignees

• TNO

Inventors

• Slaghek Theodoor Maximiliaan
• Van Vliet Dave
• Giezen Cecile
• Haaksman Ingrid Karin

Classifications

• C08L95/00 Primary

  Compositions of bituminous materials, e.g. asphalt, tar, pitch · CPC title

• C08L97/005

  Lignin · CPC title

• C08L97/002

  Peat, lignite, coal (ceramic products based on carbon or carbides C04B35/00; working-up peat C10F7/00; briquettes C10L5/00) · CPC title

• C08L2555/82

  from natural renewable resources, e.g. starch, cellulose, saw dust, straw, hair or shells · CPC title