Asphalt modifier and asphalt composition comprising the same

  • US 9,926,448 B2
  • Filed: 07/03/2015
  • Issued: 03/27/2018
  • Est. Priority Date: 11/04/2014
  • Status: Active Grant
First Claim
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1. An asphalt modifier comprising a vinyl aromatic hydrocarbon-conjugated diene block copolymer of Formula 1:


  • (A-B-C)n-D 



    [Formula 1]in Formula 1,A represents a vinyl aromatic hydrocarbon block having a peak molecular weight (Mp) of 10,000 g/mol to 35,000 g/mol,B represents a first conjugated diene block having a peak molecular weight (Mp) of 16,000 g/mol to 30,000 g/mol and an amount of vinyl of 10 wt % to 20 wt %,C represents a second conjugated diene block having a peak molecular weight (Mp) of 10,000 g/mol to 24,000 g/mol and an amount of vinyl of greater than 20 wt % and equal to or less than 34 wt %,D represents a residual group of a coupling agent, andn is an integer between 2 and 4.

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