K-Resin KR20

K-Resin® KR20 a clear styrene-butadiene block copolymer (SBC) with an exceptional high toughness. K-Resin® KR20 is mainly used in compounding of styrenic polymers to enhance the impact properties of such blends.

Key Features

  • Improved toughness for styrenic polymers and styrenic polymer blends


  • Impact modification of styrenic polymer and styrenic polymer blends
  • Grade Version
  • Properties

    Properties of K-Resin KR20

    Property, Test Condition Standard Unit Values
    Rheological Properties
    Melt Flow Rate, 200 °C/5 kg ASTM D 1238 g/10 min 6
    Mechanical Properties
    Instrumented Dart Impact (total energy) ASTM D 3763 in-lbs 292
    Tensile Stress at Yield, 23 °C ASTM D 638 psi 1500
    Flexural Strength, 23 °C ASTM D 790 psi 2300
    Flexural Modulus, 23 °C ASTM D 790 psi x 10³ 92670
    Hardness, Shore D ASTM D 2240 - 46
    Thermal Properties
    Vicat Softening Temperature, B/1 ( 120 °C/h, 10N) ASTM D 1525 °F 140
    DTUL @ 264 psi - Annealed ASTM D 648 °F 122
    Optical Properties
    Light Transmission at 550 nm ASTM D 1003 % 91
    Other Properties
    Density ASTM D 792 lb/in³ 0.99

    Typical values for uncolored products

  • Processing

    Processing of K-Resin KR20

  • Safety Data Sheet