Invention Grant
- Patent Title: Asphalt composition for road paving
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Application No.: US16478074Application Date: 2017-01-18
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Publication No.: US11299631B2Publication Date: 2022-04-12
- Inventor: Eiji Shirai
- Applicant: KAO CORPORATION
- Applicant Address: JP Tokyo
- Assignee: KAO CORPORATION
- Current Assignee: KAO CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- International Application: PCT/JP2017/001583 WO 20170118
- International Announcement: WO2018/134921 WO 20180726
- Main IPC: C08L95/00
- IPC: C08L95/00

Abstract:
The present invention relates to an asphalt composition for road pavement, which is excellent in drying strength, strength after immersion in water, and strength after immersion in petroleum, a method for producing the same, and a road paving method.
[1] An asphalt composition for road pavement, containing asphalt, a polyester resin, and an aggregate, wherein the polyester resin is one subjected to melt-kneading and a ratio of the polyester resin is 5 parts by mass or more and 50 parts by mass or less based on 100 parts by mass of the asphalt; [2] a method for producing an asphalt composition for road pavement, including a step of mixing asphalt, a polyester resin, and an aggregate at 130° C. or higher and 200° C. or lower, wherein the polyester resin used in the mixing step is one subjected to melt-kneading, and a ratio of the polyester resin is 5 parts by mass or more and 50 parts by mass or less based on 100 parts by mass of the asphalt; and [3] a road paving method including a step of laying an asphalt composition obtained by the method of [2], thereby forming an asphalt paving material layer.
[1] An asphalt composition for road pavement, containing asphalt, a polyester resin, and an aggregate, wherein the polyester resin is one subjected to melt-kneading and a ratio of the polyester resin is 5 parts by mass or more and 50 parts by mass or less based on 100 parts by mass of the asphalt; [2] a method for producing an asphalt composition for road pavement, including a step of mixing asphalt, a polyester resin, and an aggregate at 130° C. or higher and 200° C. or lower, wherein the polyester resin used in the mixing step is one subjected to melt-kneading, and a ratio of the polyester resin is 5 parts by mass or more and 50 parts by mass or less based on 100 parts by mass of the asphalt; and [3] a road paving method including a step of laying an asphalt composition obtained by the method of [2], thereby forming an asphalt paving material layer.
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