Asphalt composition comprising linear diblock copolymer

• US 20050004273A1
• Filed: 12/04/2002
• Published: 01/06/2005
• Est. Priority Date: 12/04/2001
• Status: Abandoned Application

• Current Assignee: LG Chem Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Cho, Jae-Cheol, Chun, Moon-Seok, Lee, Choon-Hwa, Sim, Kyu-Seok
• Application Number:
  US10/497,405
• Publication Number:
  US 20050004273A1
• Time in Patent Office: Days
• US Class Current: 524/59
• CPC Class Codes: C08L 25/10 with conjugated dienes
• CPC Class Codes: C08L 2666/08 Homopolymers or copolymers according to C08L7/00 - C08L21/00; Derivatives thereof
• CPC Class Codes: C08L 53/00 Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 53/02 of vinyl-aromatic monomers and conjugated dienes
• CPC Class Codes: C08L 9/08 Latex
• CPC Class Codes: C08L 95/00 Compositions of bituminous materials, e.g. asphalt, tar, pitch

Abstract

The present invention relates to an asphalt composition comprising a linear diblock copolymer. Particularly, an asphalt composition comprising a linear diblock copolymer consisting of a vinyl aromatic hydrocarbon/conjugated diene has superior dispersion, elongation and a high softening point, and an asphalt composition to which a small amount of sulfur compound is further added has more improved dispersion and thus elongation and softening temperature can be improved more effectively.

Claims

1. An asphalt composition comprising;

a) asphalt; and

b) a linear diblock copolymer of a vinyl aromatic hydrocarbon/conjugated diene.

2. The asphalt composition according to claim 1, wherein the composition further comprises a sulfur compound.

3. The asphalt composition according to claim 1, wherein a weight ratio of the vinyl aromatic hydrocarbon and the conjugated diene is 5:

95˜

40;

60, and an average molecular weight is 5,000-500,000.

4. The asphalt composition according to claim 1, wherein the vinyl aromatic hydrocarbon is selected from a group consisting of styrene, α

-methylstyrene, 3-methylstyrene, 4-methylstyrene, 4-propylstyrnee, 1-vinylnaphathalene, 4-cyclohexylstyrene, 4-(ρ

-methylphenyl)styrene, 1-vinyl-5-hexylnaphthalene, and a mixture thereof.

5. The asphalt composition according to claim 1, wherein the conjugated diene is selected from a group consisting of 1,3-butadiene, 2,3-dimethyl-1-3-butadiene, piperilene, 3-butyl-1,3-octadiene, isoprene, 2-phenyl-1,3-butadiene, and a mixture thereof.

6. The asphalt composition according to claim 1, wherein the vinyl aromatic hydrocarbon is styrene and the conjugated diene is butadiene.

7. The asphalt composition according to claim 1, wherein a weight mixing ratio of the linear diblock copolymer and asphalt is 0.1:

99.9˜

20;

80.

8. The asphalt composition according to claim 2, wherein the sulfur compound is added in an amount of 0.001˜

0.2 pha (part/hundred asphalt).