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Tech guide Elastomers
December 12, 2001
Characteristics of Tufprene™- and Asaprene™-modified Asphalt
Asphalt modified with Tufprene™ and Asaprene™ series elastomers shows substantially reduced temperature sensitivity, lengthened service life, and other enhanced characteristics.

  Tufprene™
A
Tufprene™
315
Asaprene™
T-437
Asaprene™
T-430
Asaprene™
T-411
Straight
asphalt
60-80
Elastomer Styrene content (wt%) 40 20 30 30 30 --
MFR, 200°C, 5 kg load
(g/10 min)
13 15 2 <1 <1 --
Formulation Melt viscosity, 200°C(cP) 650 1,370 1,560 2,950 3,150 120
Softening point (°C) 96 83.5 108 112.5 119.5 48
Penetration (1/10 mm) 69 37 43 49 47 77
Tensile
properties
Yield strength
(kgf/cm2)
1.4 1.9 1.4 1.5 1.4 0.3
Max. stress
(kgf/cm2)
-- -- 3.7 4.4 5.1 --
Elongation (%) 1,500 1,050 1,700 1,950 1,800 >3,000
Low temperature bending test
(°C)
0 -20 -5 -5 -5 10
Formulation (parts): Elastomer (10); straight asphalt 60-80 (90)

Test conditions: Melt viscosity: Brookfield viscometer, 200°C
Softening point: R&B method
Penetration: 5 sec, 100 g, 25°C
Tensile properties: 100 mm/min, 23°C
Low temperature bending test: 15 mm dia. rods
  • Please note that all data and values are given as typical results obtained with the indicated test methods,
    and not as any product specification or warranty of any nature.

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