With
Asaprene™ T
contents of up to about 5 wt%, as shown here, as blending
progresses the elastomer gradually forms an extremely
fine-particle, uniform dispersion throughout the straight
asphalt matrix.
Blend ratio: Asaprene™ T/straight
asphalt 60-80 = 5/95 wt%, blending temp.: 180°C
|
Blending time |
1.5
hr |
3
hr |
6
hr |
|
Softening
point (°C) |
92 |
73 |
62 |
|
Elastomer
area (%) |
13 |
15 |
14 |
|
Mean
particle size (µm2) |
1.1 |
0.4 |
0.3 |
|
Electron
micrographs |
 |
 |
 |
|
Dark regions: elastomer, light regions:
asphalt.
With Asaprene™ T
addition of about 8 wt% or more, the elastomer absorbs
oil from the straight asphalt as it disperses, grows
in relative area, and takes on a matrix configuration.
Blend ratio: Asaprene™ T/straight
asphalt 60-80 = 8/92 wt%, blending temp.: 180°C
|
Blending time |
1.5
hr |
3
hr |
6
hr |
|
Softening
point (°C) |
109 |
109 |
107 |
|
Elastomer
area (%) |
26 |
26 |
27 |
|
Electron
micrographs |
 |
 |
 |
|
Dark regions: elastomer, light regions:
asphalt. |
