Asphalt composition

Patent metadata

Field	Value
Publication number	US-2021147295-A1
Application number	US-202017096207-A
Country	US
Kind code	A1
Filing date	Nov 12, 2020
Priority date	Nov 18, 2019
Publication date	May 20, 2021
Grant date	—

Abstract

The present invention relates to an asphalt composition containing asphalt and a polyester, wherein the polyester includes an alcohol component-derived structural unit including an alkylene oxide adduct of bisphenol A and an alkylene glycol compound having 3 or more carbon atoms (exclusive of the alkylene oxide adduct of bisphenol A).

First claim

1 . An asphalt composition comprising asphalt and a polyester, wherein
the polyester includes an alcohol component-derived structural unit including an alkylene oxide adduct of bisphenol A and an alkylene glycol compound having 3 or more carbon atoms (exclusive of the alkylene oxide adduct of bisphenol A).

2 . The asphalt composition according to claim 1 , wherein the alkylene glycol compound is at least one selected from the group consisting of an alkylene glycol and a polyalkylene glycol.

3 . The asphalt composition according to claim 1 , wherein the alkylene glycol compound is at least one selected from the group consisting of propylene glycol and polypropylene glycol.

4 . The asphalt composition according to claim 1 , wherein the alkylene oxide adduct of bisphenol A is a compound represented by the following formula (I);

wherein OR 1 and R 1 O each represent an alkylene oxide; R 1 represents an alkylene group having 2 or 3 carbon atoms; x and y each represent a positive number expressing an average addition molar number of the alkylene oxide;
and a sum total of x and y is 1 or more and 16 or less.

5 . The asphalt composition according to claim 1 , wherein the alcohol component includes 70 mol % or more and 98.5 mol % or less of the alkylene oxide adduct of bisphenol A and includes 1.5 mol % or more and 30 mol % or less of the alkylene glycol compound, in 100 mol % of the alcohol component.

6 . The asphalt composition according to claim 1 , wherein the content of the polyester in the asphalt composition is 0.5 parts by mass or more and 16 parts by mass or less based on 100 parts by mass of the asphalt.

7 . The asphalt composition according to claim 1 , comprising a thermoplastic elastomer.

8 . The asphalt composition according to claim 1 , wherein the polyester has a softening point of 80° C. or higher and 130° C. or lower and a glass transition point of 40° C. or higher and 80° C. or lower.

9 . The asphalt composition according to claim 1 , wherein a molecular weight of the alkylene glycol compound is 300 or more and 800 or less.

10 . The asphalt composition according to claim 1 , wherein a propylene oxide adduct of bisphenol A is included as the alkylene oxide adduct of bisphenol A, and an average addition molar number of propylene oxide in the propylene oxide adduct of bisphenol A is 2.0 or more and 3.0 or less.

11 . The asphalt composition according to claim 7 , wherein the thermoplastic elastomer is at least one selected from the group consisting of a styrene/butadiene block copolymer, a styrene/butadiene/styrene block copolymer, a styrene/butadiene random copolymer, a styrene/isoprene block copolymer, a styrene/isoprene/styrene block copolymer, a styrene/isoprene random copolymer, an ethylene/vinyl acetate copolymer, and an ethylene/acrylic acid ester copolymer.

12 . An asphalt mixture comprising the asphalt composition according to claim 1 and an aggregate.

13 . A method for producing an asphalt mixture, comprising a step of mixing a heated aggregate, asphalt, and a polyester, wherein the polyester includes an alcohol component-derived structural unit including an alkylene oxide adduct of bisphenol A and an alkylene glycol compound having 3 or more carbon atoms (exclusive of the alkylene oxide adduct of bisphenol A).

14 . The method for producing an asphalt mixture according to claim 13 , wherein in the mixing step,
(i) the asphalt is added to and mixed with the heated aggregate, and then, the polyester is added and mixed; (ii) the asphalt and the polyester are simultaneously added to and mixed with the heated aggregate; or (iii) a mixture of the asphalt and the polyester, which has been previously heated and mixed, is added to and mixed with the heated aggregate.

Assignees

• Kao Corp

Inventors

• Fukuri Norihiro

Classifications

• C08G63/672

  Dicarboxylic acids and dihydroxy compounds · CPC title

• C08G63/183

  Terephthalic acids · CPC title

• E01C7/18

  of road-metal and bituminous binders {(for surface treatments except for penetration coverings, or for thin surface layers E01C7/353; bituminous mixtures C08L95/00)} · CPC title

• C08L95/00 Primary

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

• C04B2111/0075

  for road construction · CPC title