Title:
NEW ASPHALT COMPOSITION, AND NEW BLOCK COPOLYMER COMPOSITION FOR ASPHALT MODIFICATION
Document Type and Number:
Japanese Patent JP3313297
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain an asphalt composition manifesting high softening point, excellent in mechanical strengths, processability and storing stability and suitable for road paving by compounding a specific amount of a composition of a block copolymer of an alkenyl aromatic compound having a specific structure and a conjugated diene.
SOLUTION: The composition consists of (A) 3-15 parts of the block copolymer composition having 0.3-15.0 of melt flow index and 80-130°C of softening point, (B) 85-97 parts of asphalt, and is set that the component (A) consists of 98-20wt.% of a block copolymer (A1) comprising a polymer block (R1) mainly consisting of at least two monoalkenyl aromatic compounds and a copolymer block (R2) mainly consisting of the conjugated diene polymer (X), and 2-80% of a block copolymer (A2) comprising R1 and R2 having peak molecular weight corresponding to 1/3-2/3 of (A1), the difference between total amount of alkenyl aromatic compounds (Z) and R1 content is 2-30%, the contents of Z and R1 are 10-50% respectively, the amount of vinyl bond in the X is 0-50%.
Inventors:
Keiichi Toda
Yukinori Nakamichi
Yukinori Nakamichi
Application Number:
JP2985197A
Publication Date:
August 12, 2002
Filing Date:
January 30, 1997
Export Citation:
Assignee:
Nippon Elastomer Co., Ltd.
International Classes:
C08L95/00; (IPC1-7): C08L95/00
Domestic Patent References:
| JP593140A | ||||
| JP5279574A | ||||
| JP641439A | ||||
| JP8100126A | ||||
| JP9302234A | ||||
| JP7228784A | ||||
| JP8165436A | ||||
| JP8165435A | ||||
| JP11335433A | ||||
| JP11315187A | ||||
| JP1180554A | ||||
| JP8508310A |
Other References:
Ｉ．Ｍ．Ｋｏｌｔｈｏｆｆ ｅｔ ａｌ．，”Ｄｅｔｅｒｍｉｎａｔｉｏｎ ｏｆ Ｐｏｌｙｓｔｙｒｅｎｅ ｉｎ ＧＲ−Ｓ Ｒｕｂｂｅｒ”，Ｊｏｕｒｎａｌ ｏｆ Ｐｏｌｙｍｅｒ Ｓｃｉｅｎｃｅ，第１巻，４２９−４３３
田中 康之 その他，スチレン−ブタジエン共重合体の連鎖分析解析，高分子学会予稿集，日本，高分子学会，第２９巻９号，２０５５−２０５８
田中 康之 その他，スチレン−ブタジエン共重合体の連鎖分析解析，高分子学会予稿集，日本，高分子学会，第２９巻９号，２０５５−２０５８
Attorney, Agent or Firm:
Takeshi Shimizu (3 others)