Title:
MODIFIED ASPHALT COMPOSITION CONTAINING TAPERED BLOCK COPOLYMER
Document Type and Number:
Japanese Patent JP2009127048
Kind Code:
A
Abstract:
To provide a modified asphalt composition which provides comparable or better softening point when compared to conventional compositions, and exhibits superior ductility at low temperature, thereby being applicable to road paving, waterproof sheets and sealants.
The modified asphalt composition comprises 100 pts.wt. of asphalt and 0.5-40 pts.wt. of a block copolymer represented by the chemical formula 1: A1-B1-X-B2-A2, wherein A1 and A2 each represents a polymer block containing an aromatic vinyl monomer; B1 and B2 each represents a polymer block containing a butadiene monomer; X is a coupling agent; and a rate of blocking of A is 70-95%.
Inventors:
KIM SAM MIN
NA DONG HYUK
LEE DAE HYUNG
NA DONG HYUK
LEE DAE HYUNG
Application Number:
JP2008288336A
Publication Date:
June 11, 2009
Filing Date:
November 11, 2008
Export Citation:
Assignee:
KUMHO PETROCHEMICAL CO LTD
International Classes:
C08L95/00; C08L53/02
Domestic Patent References:
| JPH08301956A | 1996-11-19 | |||
| JPH0641439A | 1994-02-15 | |||
| JP2002030126A | 2002-01-31 | |||
| JPH11315187A | 1999-11-16 | |||
| JP2004292789A | 2004-10-21 |
Attorney, Agent or Firm:
Shigeo Ishijima
Hideki Abe
Hideki Abe