Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Kaneka M-521 Impact Modifier

Kaneka M-521 is an MBS core-shell impact modifier copolymerized from methyl methacrylate-butadiene-styrene with 60% rubber content. It improves the room and low temperature impact strength of engineering plastics with almost no adverse effect on the core properties such as HDT, weather resistance of substrates, with excellent retention of rigidity and surface finish, suitable for PC, PC/ABS, PBT and other engineering plastics as well as glass fiber reinforced systems.

Features Of Kaneka M-521 Impact Modifier

  1. MBS core-shell structure with 60% rubber content, uniform particle size, no influence from mixing process and good dispersibility

  2. Excellent room and low temperature impact resistance, no adverse effect on substrate HDT heat distortion temperature, good weather resistance

  3. Negligible effect on the physical properties of engineering plastics, outstanding retention of rigidity and surface finish

  4. Superior processability, compatible with injection, compression molding, extrusion, blow molding and other forming processes

  5. Wide application range, suitable for thermoplastic engineering plastics and glass fiber reinforced nylon, epoxy resin and other thermosetting resins

Typical Applications Of Kaneka M-521 Impact Modifier

  1. Impact modification of PC, PBT, PET, SAN and PC/ABS, PC/PBT engineering plastics and their alloys

  2. Toughening modification of glass fiber reinforced nylon, epoxy resin and other thermosetting resins

  3. Preparation of electronic and electrical structural parts and enclosures with high requirements for rigidity and surface finish

  4. Modification processing of automotive lightweight engineering plastic parts and precision mechanical components

  5. Production of various engineering plastic products requiring room and low temperature impact resistance while retaining the basic properties of substrates

Specifications Of Kaneka M-521 Impact Modifier

Product Information
Product NameKaneka Kane Ace M-521 MBS Impact Modifier
Product SeriesKane Ace M Series
Product TypeMBS Core-shell Copolymer Impact Modifier
Chemical CompositionMethyl methacrylate-butadiene-styrene (MBS) copolymer
AppearanceWhite high-flow powder
Rubber Content60%
Molecular FormulaC17H22O2
Mechanical Properties (5phr in PC)
Izod Notched Impact (23℃, 1/8inch)74.3 kJ/m²
Izod Notched Impact (-30℃, 1/8inch)9.5 kJ/m²
Izod Notched Impact (23℃, 1/4inch)53.8 kJ/m²
Izod Notched Impact (-30℃, 1/4inch)8.0 kJ/m²
Heat Distortion Temperature (HDT)92.5 ℃
Melt Flow Rate (MFR)11.4 g/10min
Processing & Applications
Processing CompatibilityInjection, compression molding, extrusion, blow molding
Applicable SubstratesPC, PBT, PET, SAN, PC/ABS, PC/PBT, glass fiber reinforced nylon, epoxy resin










































































































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