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ABUST® 1507S298 
IMPACT MODIFIERS FOR ENGINEERING RESINS

ABUST® 1507S298 additive is an ABS impact modifier designed to provide superior low temperature toughness to thermoplastic polyester and polyester blends. The ABUST® 1507S298 impact modifiers are based on the well known core shell technology in which a rubber core is encapsulated by a hard polymer shell. A key toughening parameter is the particle size of the rubber which is determined during the manufacturing process of the modifier. The rubber particle size of ABUST® 1507S298 has been optimized for use in thermoplastic polyester and blends.

ABUST® 1507S298 offers the following benefits:

  • Excellent low temperature toughness
  • Ease of processing
  • Good balance of physical properties
  • Good thermal stability
  • Retention of matrix polymer's rheological properties

Impact Performance (At Various Temperatures)

    Table 1
    Impact Performance of ABUST® 1507S298 in PBT

    Izod Impact Strength
    ( ft – lb / in )

     

    23°C

    -20°C

    -40°C

      ABUST®1507S298

    19.5

    15.0

     3.4

    Standard test formulations consist of 80% PC and 20% impact modifier. Compounding was accomplished on a Leistriz 34 mm co-rotating twin screw extruder. Impact specimens (2.5 ”x 0.5 “ x 0.125 ”) were molded on a 73-ton Arburg injection molder.

    Table 2
    Impact Performance of ABUST® 1507S298 in PC
    Izod Impact Strength
    ( ft – lb / in )

     

    23°C

    -20°C

    -40°C

      ABUST®1507S298

    12.6

    10.0
    8.0
    Standard test formulations consist of 90% PC and 10% impact modifier Compounding was accomplished on a Leistriz 34 mm co-rotating twin screw extruder. Impact specimens (2.5 ”x 0.5 “ x 0.125 ”) were molded on a 73-ton Arburg injection molder.

Performance

Figures 1 and 2 demonstrate how ABUST® 1507S298 improves the impact performance of both polybutylene terephthalate and polycarbonate.

    Figure 1
    ABUST® 1507S298 Offers Superior Properties
    Polybutylene Terephthalate

    Figure 2
    ABUST® 1507S298 Offers Superior Impact
    Strength Polycarbonate

Thermal Stability

Table 3 shows the results of thermal gravimetric analysis (TGA) of ABUST® 1507S298 in both air and nitrogen environments.

    Table 3
    Thermal Stability of ABUST® 1507S298 (TGA, °C)
     
    Air
    Nitrogen

    5 % Wt. Loss

    248

    367

    10% Wt. Loss

    253

    387
    Heated at Deg / min

Figures 3 demonstrates the improvement in heat aging performance due to ABUST®1507S298in both polybutylene terephthalate and polycarbonate, compared to the same resins modified with a typical MBS modifier. The ABUST® 1507S298 modifier enables both resins to maintain their superior impact performance during prolonged exposure to elevated temperatures.

    Figure 3
    ABUST® 1507S298 Offers Superior Thermal Stability
    (80/20 – PBT Blends at Room Temp)

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